I63.89 ICD-10-CM Code: Other cerebral infarction

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for I63.89 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2026Effective: October 1, 2025

Notes without a marker are published on I63.89 itself; “inherited from” names the category or block whose note applies here.

Coder workflow for I63.89

MedCoder structured workflow — derived from this code’s own official record

Before you code I63.89

1. “Other” (NEC) means the condition is specified in the record but no dedicated code captures it. Confirm the documented form is not one a sibling code names before settling on I63.89; if the record states no specifics at all, the unspecified sibling applies instead. “Other” codes are for documented conditions the classification gives no specific code; “unspecified” codes are for records lacking the detail (Guidelines I.A.9.a, I.A.9.b).

   See the relationships section · Guide: Other vs unspecified (NEC vs NOS) →

2. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with I63.89. Excludes1 conditions are not reported together with this code unless the record shows they are unrelated (Guidelines I.A.12.a).

   See the official tabular notes

Choose the right path

1. Does the documentation support a condition named in I63.89’s Excludes1 note?
   Yes → Do not simply proceed: review the excluded code. Both are reported only when the record shows the two conditions are unrelated.
   No → Continue.

   ReviewP91.82, S06

Consider I63.89. Then work the Use Additional Code note, and confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement

Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).

The conditions the Use Additional Code note names

Reported with this code when documented; a conditional instruction (“if applicable”, “if known”) applies only when the record supports it.

Any detail beyond this code’s title

What the record states that a more specific sibling code would capture — or its absence, which itself supports the unspecified code.

Official instructions as workflow

• Excludes1 — check before selecting I63.89(2 notes)

  Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with I63.89: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

  CompareP91.82, S06

  See the official tabular notes · Guidelines I.A.12.a

• Excludes2 — not part of I63.89(2 notes)

  Coding workflow: The conditions named in this note are not included in I63.89. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

  CompareZ86.73, I69.3

  See the official tabular notes · Guidelines I.A.12.b

• Use Additional Code — after identifying I63.89(10 notes)

  Coding workflow: Check whether the documentation supports the additional code(s) the note names, and report them with I63.89 when it does. Where the instruction is conditional (“if applicable”, “if known”), it applies only when the record documents the condition.

  ReviewZ92.82, R29.7, F10, Z77.22, Z87.891, Z57.31

  See the official tabular notes · Guidelines I.A.13

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Indexed Clinical Terms (2)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

• Infarct, infarction, cerebral (acute), specified NEC
• Syndrome, superior, cerebellar artery

Official Coding Guidelines

Official source data — quoted verbatim from the CMS/NCHS Official Guidelines

Official source data — quoted verbatim from the CMS/NCHS Official Guidelines

Verbatim excerpts from the ICD-10-CM Official Guidelines for Coding and Reporting (CMS/NCHS) that govern this code.

Don’t confuse I63.89 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of I63.89 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

• P91.82— Excludes1 conflict (Excludes1 — generally not reported together)

  Not coded here — the tabular list excludes this pair for the same encounter.

  Not reported together with this code, except where the two conditions are documented as unrelated.

  What moves you there: Documentation of neonatal cerebral infarction moves the case to P91.82; the two are not reported together unless documented as unrelated.

  Full comparison: I63.89 vs P91.82 →

• S06— Excludes1 conflict (Excludes1 — generally not reported together)

  Not coded here — the tabular list excludes this pair for the same encounter.

  Not reported together with this code, except where the two conditions are documented as unrelated.

  What moves you there: Documentation of traumatic intracranial hemorrhage moves the case to S06; the two are not reported together unless documented as unrelated.

  Full comparison: I63.89 vs S06 →

• Z86.73— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of chronic, without residual deficits (sequelae) adds Z86.73; it is not part of this code and both may be reported when both are documented.

  Full comparison: I63.89 vs Z86.73 →

• I69.3— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of sequelae of cerebral infarction adds I69.3; it is not part of this code and both may be reported when both are documented.

  Full comparison: I63.89 vs I69.3 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Decision Points

The directives on this code's own record, as a pre-claim checklist.

1. 10 Use Additional Code instructions — report the named additional code(s) when the documentation supports them. See the Use Additional Code notes
2. 2 Excludes1 entries — codes named there are generally not reported together with this code (Guidelines I.A.12.a). See the Excludes1 notes
3. 2 Excludes2 entries — those conditions are not part of this code and may be reported additionally when documented. See the Excludes2 notes

Checklist rows are derived from this code's own official directives; the wording of each check is MedCoder editorial. The official notes themselves are in the sections each row links to.

Verify Before Coding

• MCC as a secondary diagnosis (FY2026). Can raise the stay's MS-DRG severity tier.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder structured relationships — computed from published CMS and AHRQ datasets

Other codes that name I63.89 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 5 Excludes1 notes across 3 chapters: G31.84 — Mild cognitive impairment of uncertain or unknown etiology (via I63.-), I65 — Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction (via I63.-), I66 — Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction (via I63.-), I67 — Other cerebrovascular diseases (via I63.-), P91.82 — Neonatal cerebral infarction (via I63.-).

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 3 Excludes2 notes: I10 — Essential (primary) hypertension (via I63.-), I15 — Secondary hypertension (via I63.-), I74 — Arterial embolism and thrombosis (via I63.-).

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

Referenced by 3 Code First instructions across 3 chapters: G46 — Vascular syndromes of brain in cerebrovascular diseases (via I63.-), R29.7 — National Institutes of Health Stroke Scale (NIHSS) score (via I63.-), Z92.82 — Status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility (via I63.-).

Each of these codes carries a Code First note naming this condition — when that code is reported, THIS code is sequenced first, ahead of it.

Referenced by 11 Code Also instructions across 3 chapters: D57.03 — Hb-SS disease with cerebral vascular involvement (via I63.-), D57.213 — Sickle-cell/Hb-C disease with cerebral vascular involvement (via I63.-), D57.413 — Sickle-cell thalassemia, unspecified, with cerebral vascular involvement (via I63.-), D57.433 — Sickle-cell thalassemia beta zero with cerebral vascular involvement (via I63.-), D57.453 — Sickle-cell thalassemia beta plus with cerebral vascular involvement (via I63.-), D57.813 — Other sickle-cell disorders with cerebral vascular involvement (via I63.-), D81.32 — Adenosine deaminase 2 deficiency (via I63.-), G43.6 — Persistent migraine aura with cerebral infarction (via I63.-), G96.81 — Intracranial hypotension (via I63.-), I16.1 — Hypertensive emergency (via I63.-), I67.850 — Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (via I63.-).

These codes suggest coding this condition alongside when both are present.

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

FY2026 MS-DRG: MCC — Major Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 84 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 10 MS-DRGs: DRG 023 (MDC 01), DRG 024 (MDC 01), DRG 061 (MDC 01), DRG 062 (MDC 01), DRG 063 (MDC 01), DRG 064 (MDC 01), DRG 065 (MDC 01), DRG 066 (MDC 01), DRG 791 (MDC 15), DRG 793 (MDC 15).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):CIR020 — Cerebral infarction (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same clinical process (MS-DRG)

Acts as MCC — raises the severity of other admissions. CMS groups these diagnoses into one MS-DRG principal-diagnosis exclusion process — a CC/MCC on this list never raises severity when the principal diagnosis is also on it.

I63.532 — Cerebral infarction due to unspecified occlusion or stenosis of left posterior cerebral artery, I63.533 — Cerebral infarction due to unspecified occlusion or stenosis of bilateral posterior cerebral arteries, I63.539 — Cerebral infarction due to unspecified occlusion or stenosis of unspecified posterior cerebral artery, I63.541 — Cerebral infarction due to unspecified occlusion or stenosis of right cerebellar artery, I63.542 — Cerebral infarction due to unspecified occlusion or stenosis of left cerebellar artery, I63.543 — Cerebral infarction due to unspecified occlusion or stenosis of bilateral cerebellar arteries, I63.549 — Cerebral infarction due to unspecified occlusion or stenosis of unspecified cerebellar artery, I63.59 — Cerebral infarction due to unspecified occlusion or stenosis of other cerebral artery, I63.6 — Cerebral infarction due to cerebral venous thrombosis, nonpyogenic, I63.81 — Other cerebral infarction due to occlusion or stenosis of small artery, I63.9 — Cerebral infarction, unspecified, I66.01 — Occlusion and stenosis of right middle cerebral artery, I66.02 — Occlusion and stenosis of left middle cerebral artery, I66.03 — Occlusion and stenosis of bilateral middle cerebral arteries, I66.09 — Occlusion and stenosis of unspecified middle cerebral artery, I66.11 — Occlusion and stenosis of right anterior cerebral artery, I66.12 — Occlusion and stenosis of left anterior cerebral artery, I66.13 — Occlusion and stenosis of bilateral anterior cerebral arteries, I66.19 — Occlusion and stenosis of unspecified anterior cerebral artery, I66.21 — Occlusion and stenosis of right posterior cerebral artery, +63 more

Same CMS-HCC risk category (V28)

CMS maps these diagnoses to the same Hierarchical Condition Category (Ischemic or Unspecified Stroke) for risk-adjusted payment.

I63.521 — Cerebral infarction due to unspecified occlusion or stenosis of right anterior cerebral artery, I63.522 — Cerebral infarction due to unspecified occlusion or stenosis of left anterior cerebral artery, I63.523 — Cerebral infarction due to unspecified occlusion or stenosis of bilateral anterior cerebral arteries, I63.529 — Cerebral infarction due to unspecified occlusion or stenosis of unspecified anterior cerebral artery, I63.531 — Cerebral infarction due to unspecified occlusion or stenosis of right posterior cerebral artery, I63.532 — Cerebral infarction due to unspecified occlusion or stenosis of left posterior cerebral artery, I63.533 — Cerebral infarction due to unspecified occlusion or stenosis of bilateral posterior cerebral arteries, I63.539 — Cerebral infarction due to unspecified occlusion or stenosis of unspecified posterior cerebral artery, I63.541 — Cerebral infarction due to unspecified occlusion or stenosis of right cerebellar artery, I63.542 — Cerebral infarction due to unspecified occlusion or stenosis of left cerebellar artery, I63.543 — Cerebral infarction due to unspecified occlusion or stenosis of bilateral cerebellar arteries, I63.549 — Cerebral infarction due to unspecified occlusion or stenosis of unspecified cerebellar artery, I63.59 — Cerebral infarction due to unspecified occlusion or stenosis of other cerebral artery, I63.6 — Cerebral infarction due to cerebral venous thrombosis, nonpyogenic, I63.81 — Other cerebral infarction due to occlusion or stenosis of small artery, I63.9 — Cerebral infarction, unspecified, P91.821 — Neonatal cerebral infarction, right side of brain, P91.822 — Neonatal cerebral infarction, left side of brain, P91.823 — Neonatal cerebral infarction, bilateral, P91.829 — Neonatal cerebral infarction, unspecified side, +74 more

Related risk categories

These categories interact through CMS's HCC hierarchy — one can suppress the other's risk-adjustment weight when both are present on a claim.

Intracranial Hemorrhage

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Cerebral infarction).

I63.533 — Cerebral infarction due to unspecified occlusion or stenosis of bilateral posterior cerebral arteries, I63.539 — Cerebral infarction due to unspecified occlusion or stenosis of unspecified posterior cerebral artery, I63.541 — Cerebral infarction due to unspecified occlusion or stenosis of right cerebellar artery, I63.542 — Cerebral infarction due to unspecified occlusion or stenosis of left cerebellar artery, I63.543 — Cerebral infarction due to unspecified occlusion or stenosis of bilateral cerebellar arteries, I63.549 — Cerebral infarction due to unspecified occlusion or stenosis of unspecified cerebellar artery, I63.59 — Cerebral infarction due to unspecified occlusion or stenosis of other cerebral artery, I63.6 — Cerebral infarction due to cerebral venous thrombosis, nonpyogenic, I63.8 — Other cerebral infarction, I63.81 — Other cerebral infarction due to occlusion or stenosis of small artery, I63.9 — Cerebral infarction, unspecified, I97.810 — Intraoperative cerebrovascular infarction during cardiac surgery, I97.811 — Intraoperative cerebrovascular infarction during other surgery, I97.820 — Postprocedural cerebrovascular infarction following cardiac surgery, I97.821 — Postprocedural cerebrovascular infarction following other surgery, R29.700 — NIHSS score 0, R29.701 — NIHSS score 1, R29.702 — NIHSS score 2, R29.703 — NIHSS score 3, R29.704 — NIHSS score 4, +122 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main term “Infarct, infarction”; these codes share that main term but sit in a different category of the Tabular List.

I21.9 — Acute myocardial infarction, unspecified (myocardium, myocardial), I21.A1 — Myocardial infarction type 2 (myocardium, myocardial, type 2), I21.A9 — Other myocardial infarction type (myocardium, myocardial, type 4), I21.B — Myocardial infarction with coronary microvascular dysfunction (myocardium, myocardial, with, coronary microvascular disease), I22.0 — Subsequent ST elevation (STEMI) myocardial infarction of anterior wall (myocardium, myocardial, subsequent, anterior), I22.1 — Subsequent ST elevation (STEMI) myocardial infarction of inferior wall (myocardium, myocardial, subsequent, inferior), I22.2 — Subsequent non-ST elevation (NSTEMI) myocardial infarction (myocardium, myocardial, subsequent, subendocardial), I22.8 — Subsequent ST elevation (STEMI) myocardial infarction of other sites (myocardium, myocardial, subsequent, septal), I22.9 — Subsequent ST elevation (STEMI) myocardial infarction of unspecified site (myocardium, myocardial, subsequent), I25.2 — Old myocardial infarction (myocardium, myocardial, past), I74.8 — Embolism and thrombosis of other arteries (spleen, embolic or thrombotic), I89.8 — Other specified noninfective disorders of lymphatic vessels and lymph nodes (lymph node), I97.190 — Other postprocedural cardiac functional disturbances following cardiac surgery (myocardium, myocardial, postprocedural, following cardiac surgery), I97.191 — Other postprocedural cardiac functional disturbances following other surgery (myocardium, myocardial, postprocedural, following other surgery), I97.790 — Other intraoperative cardiac functional disturbances during cardiac surgery (myocardium, myocardial, intraoperative, during cardiac surgery), I97.791 — Other intraoperative cardiac functional disturbances during other surgery (myocardium, myocardial, intraoperative, during other surgery), I97.810 — Intraoperative cerebrovascular infarction during cardiac surgery (cerebral, intraoperative, during cardiac surgery), I97.811 — Intraoperative cerebrovascular infarction during other surgery (cerebral, intraoperative, during other surgery), I97.820 — Postprocedural cerebrovascular infarction following cardiac surgery (cerebral, postprocedural, following cardiac surgery), I97.821 — Postprocedural cerebrovascular infarction following other surgery (cerebral, postprocedural, following other surgery), +46 more

Lab tests where this diagnosis supports Medicare coverage (NCD)

Medicare's National Coverage Determination (NCD) program lists this diagnosis as medical justification for these lab tests.

Lipid Panel, Partial Thromboplastin Time (PTT) Test, Prothrombin Time Test and INR (PT/INR)

Contextual Map

Every relationship of I63.89 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run I63.89 with these 19 related codes in Claim Check

Hierarchy

• I00-I99 — Chapter 9: Diseases of the Circulatory System (I00-I99) (I00-I99)[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I60-I69 — Cerebrovascular diseases[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026

Referenced by Excludes1 notes

• G31.84 — Mild cognitive impairment of uncertain or unknown etiology[Excludes1](via I63.-): “cerebrovascular diseases (I60-I69)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• I65 — Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction[Excludes1](via I63.-): “insufficiency of precerebral arteries causing cerebral infarction (I63.0-I63.2)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• I66 — Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction[Excludes1](via I63.-): “Occlusion and stenosis of cerebral artery causing cerebral infarction (I63.3-I63.5)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• I67 — Other cerebrovascular diseases[Excludes1](via I63.-): “Occlusion and stenosis of cerebral artery causing cerebral infarction (I63.3-I63.5-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• P91.82 — Neonatal cerebral infarction[Excludes1](via I63.-): “cerebral infarction (I63.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Referenced by Excludes2 notes

• I10 — Essential (primary) hypertension[Excludes2](via I63.-): “essential (primary) hypertension involving vessels of brain (I60-I69)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• I15 — Secondary hypertension[Excludes2](via I63.-): “secondary hypertension involving vessels of brain (I60-I69)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• I74 — Arterial embolism and thrombosis[Excludes2](via I63.-): “basilar embolism and thrombosis (I63.0-I63.2, I65.1)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Referenced by Code First instructions

• G46 — Vascular syndromes of brain in cerebrovascular diseases[Code First](via I63.-): “underlying cerebrovascular disease (I60-I69)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• R29.7 — National Institutes of Health Stroke Scale (NIHSS) score[Code First](via I63.-): “the type of cerebral infarction (I60.-, I61.-, I62.-, I63.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• Z92.82 — Status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility[Code First](via I63.-): “acute cerebral infarction (I63.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Referenced by Code Also instructions (11)

• D57.03 — Hb-SS disease with cerebral vascular involvement[Code Also](via I63.-): “, if applicable, cerebral infarction (I63.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• D57.213 — Sickle-cell/Hb-C disease with cerebral vascular involvement[Code Also](via I63.-): “, if applicable, cerebral infarction (I63.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• D57.413 — Sickle-cell thalassemia, unspecified, with cerebral vascular involvement[Code Also](via I63.-): “, if applicable cerebral infarction (I63.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• D57.433 — Sickle-cell thalassemia beta zero with cerebral vascular involvement[Code Also](via I63.-): “, if applicable cerebral infarction (I63.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• D57.453 — Sickle-cell thalassemia beta plus with cerebral vascular involvement[Code Also](via I63.-): “, if applicable cerebral infarction (I63.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• D57.813 — Other sickle-cell disorders with cerebral vascular involvement[Code Also](via I63.-): “, if applicable: cerebral infarction (I63.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• D81.32 — Adenosine deaminase 2 deficiency[Code Also](via I63.-): “stroke (I63.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• G43.6 — Persistent migraine aura with cerebral infarction[Code Also](via I63.-): “the type of cerebral infarction (I63.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• and 3 more

Clinical classification (CCSR)

• CIR020 — Cerebral infarction[CCSR]— AHRQ CCSR for ICD-10-CM Diagnoses (HCUP)

Risk adjustment (CMS-HCC)

• HCC 249 — Ischemic or Unspecified Stroke [CMS-HCC]— CMS-HCC V28 · 2026

MS-DRG Grouper (10)

• MCC — Major Complication or Comorbidity [MS-DRG severity]: “As a secondary diagnosis this code can raise the stay's MS-DRG severity tier (MCC).”— CMS MS-DRG Definitions Manual (Appendix C) · FY2026
• DRG 023 — CRANIOTOMY WITH MAJOR DEVICE IMPLANT OR ACUTE COMPLEX CNS PRINCIPAL DIAGNOSIS WITH MCC OR ANTINEOPLASTIC IMPLANT OR EPILEPSY WITH NEUROSTIMULATOR[MS-DRG]: “CRANIOTOMY WITH MAJOR DEVICE IMPLANT OR ACUTE COMPLEX CNS PRINCIPAL DIAGNOSIS WITH MCC OR ANTINEOPLASTIC IMPLANT OR EPILEPSY WITH NEUROSTIMULATOR (MDC 01)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• DRG 024 — CRANIOTOMY WITH MAJOR DEVICE IMPLANT OR ACUTE COMPLEX CNS PRINCIPAL DIAGNOSIS WITHOUT MCC[MS-DRG]: “CRANIOTOMY WITH MAJOR DEVICE IMPLANT OR ACUTE COMPLEX CNS PRINCIPAL DIAGNOSIS WITHOUT MCC (MDC 01)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• DRG 061 — ISCHEMIC STROKE, PRECEREBRAL OCCLUSION OR TRANSIENT ISCHEMIA WITH THROMBOLYTIC AGENT WITH MCC[MS-DRG]: “ISCHEMIC STROKE, PRECEREBRAL OCCLUSION OR TRANSIENT ISCHEMIA WITH THROMBOLYTIC AGENT WITH MCC (MDC 01)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• DRG 062 — ISCHEMIC STROKE, PRECEREBRAL OCCLUSION OR TRANSIENT ISCHEMIA WITH THROMBOLYTIC AGENT WITH CC[MS-DRG]: “ISCHEMIC STROKE, PRECEREBRAL OCCLUSION OR TRANSIENT ISCHEMIA WITH THROMBOLYTIC AGENT WITH CC (MDC 01)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• DRG 063 — ISCHEMIC STROKE, PRECEREBRAL OCCLUSION OR TRANSIENT ISCHEMIA WITH THROMBOLYTIC AGENT WITHOUT CC/MCC[MS-DRG]: “ISCHEMIC STROKE, PRECEREBRAL OCCLUSION OR TRANSIENT ISCHEMIA WITH THROMBOLYTIC AGENT WITHOUT CC/MCC (MDC 01)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• DRG 064 — INTRACRANIAL HEMORRHAGE OR CEREBRAL INFARCTION WITH MCC[MS-DRG]: “INTRACRANIAL HEMORRHAGE OR CEREBRAL INFARCTION WITH MCC (MDC 01)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• DRG 065 — INTRACRANIAL HEMORRHAGE OR CEREBRAL INFARCTION WITH CC OR TPA IN 24 HOURS[MS-DRG]: “INTRACRANIAL HEMORRHAGE OR CEREBRAL INFARCTION WITH CC OR TPA IN 24 HOURS (MDC 01)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• and 3 more

MDC crossing

• MDC 01 — Diseases and Disorders of the Nervous System[MDC crossing]: “Diseases and Disorders of the Nervous System — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 8,892 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Index entries

• Infarct, infarction, cerebral (acute), specified NEC[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Syndrome, superior, cerebellar artery[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026

Nearest codes (40)

• I63 — Cerebral infarction[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I63.423 — Cerebral infarction due to embolism of bilateral anterior cerebral arteries[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I63.429 — Cerebral infarction due to embolism of unspecified anterior cerebral artery[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I63.43 — Cerebral infarction due to embolism of posterior cerebral artery[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I63.431 — Cerebral infarction due to embolism of right posterior cerebral artery[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I63.432 — Cerebral infarction due to embolism of left posterior cerebral artery[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I63.433 — Cerebral infarction due to embolism of bilateral posterior cerebral arteries[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I63.439 — Cerebral infarction due to embolism of unspecified posterior cerebral artery[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• and 32 more

Change history

• FY2019 — Added to the code set[Change history]— CMS release files (code change ledger) · icd10cm-fy2019

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data

CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page

Coding guidelines Official source data

ICD-10-CM Official Guidelines for Coding and Reporting (FY2026), quoted by section Release, file and checksum · Publisher’s page

Claim edits Official source data

CMS Definitions of Medicare Code Edits — v43.1 (April 2026) Release, file and checksum · Publisher’s page

Inpatient payment groups Official source data

CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v43 Release, file and checksum · Publisher’s page

Risk adjustment Official source data

2026 Mid-Year Final ICD-10 Mappings + Model Software (cms.gov/files/zip/2026-midyear-final-icd-10-mappings.zip, 2026-midyear-final-model-software.zip) — CMS-HCC V28, PY2026 mid-year final release Release, file and checksum · Publisher’s page

Change history and date-of-service validity Official source data

CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page

Comparisons, relationships and the contextual map MedCoder structured relationship

Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears

Summary and FAQ answers MedCoder explanation

Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

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Nearest Codes in This Family

Official ICD-10-CM classifications closest to I63.89 in its code family, with their registry titles.

• I63.539 — Cerebral infarction due to unspecified occlusion or stenosis of unspecified posterior cerebral artery
• I63.54 — Cerebral infarction due to unspecified occlusion or stenosis of cerebellar artery
• I63.541 — Cerebral infarction due to unspecified occlusion or stenosis of right cerebellar artery
• I63.542 — Cerebral infarction due to unspecified occlusion or stenosis of left cerebellar artery
• I63.543 — Cerebral infarction due to unspecified occlusion or stenosis of bilateral cerebellar arteries
• I63.549 — Cerebral infarction due to unspecified occlusion or stenosis of unspecified cerebellar artery
• I63.59 — Cerebral infarction due to unspecified occlusion or stenosis of other cerebral artery
• I63.6 — Cerebral infarction due to cerebral venous thrombosis, nonpyogenic
• I63.8 — Other cerebral infarction
• I63.81 — Other cerebral infarction due to occlusion or stenosis of small artery

View all codes in the I63 family