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ICD-10/I97.821

I97.821 ICD-10-CM Code: Postprocedural cerebrovascular infarction following other surgery

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0, Appendix B.

  • MS-DRG 091 — OTHER DISORDERS OF NERVOUS SYSTEM WITH MCC (MDC 01)
  • MS-DRG 092 — OTHER DISORDERS OF NERVOUS SYSTEM WITH CC (MDC 01)
  • MS-DRG 093 — OTHER DISORDERS OF NERVOUS SYSTEM WITHOUT CC/MCC (MDC 01)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Official Registry Overview & Definition

Postprocedural cerebrovascular infarction following other surgery is a billable ICD-10-CM diagnosis code (I97.821).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for I97.821 in the official ICD-10-CM tabular list.

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code, if applicable, to further specify disorder

Change history

  • FY2017 — 2016-10-01
    Description revised
    Postprocedural cerebrovascular infarction during other surgery → Postprocedural cerebrovascular infarction following other surgery
    FY2017 changes
  • FY2017 — 2016-10-01
    Short description revised
    Postprocedural cerebrovascular infarction during oth surgery → Postprocedural cerebvasc infarction following other surgery
    FY2017 changes

Verify Before Coding

  • CC 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.

Contextual Map

Every relationship of I97.821 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.

Hierarchy

  • I00-I99 — Chapter 9: Diseases of the Circulatory System (I00-I99) (I00-I99) [Hierarchy]
  • I95-I99 — Other and unspecified disorders of the circulatory system [Hierarchy]

Referenced by Excludes2 notes

  • G97 — Intraoperative and postprocedural complications and disorders of nervous system, not elsewhere classified [Excludes2](via I97.82.-): “intraoperative and postprocedural cerebrovascular infarction (I97.81-, I97.82-)” · check together

Clinical classification (CCSR)

  • CIR038 — Postprocedural or postoperative circulatory system complication [CCSR]
  • CIR020 — Cerebral infarction [CCSR]

Potential MS-DRG

  • CC — Complication or Comorbidity [MS-DRG severity]: “As a secondary diagnosis this code can raise the stay's MS-DRG severity tier (CC).”
  • DRG 091 — OTHER DISORDERS OF NERVOUS SYSTEM WITH MCC [MS-DRG]: “OTHER DISORDERS OF NERVOUS SYSTEM WITH MCC (MDC 01)”
  • DRG 092 — OTHER DISORDERS OF NERVOUS SYSTEM WITH CC [MS-DRG]: “OTHER DISORDERS OF NERVOUS SYSTEM WITH CC (MDC 01)”
  • DRG 093 — OTHER DISORDERS OF NERVOUS SYSTEM WITHOUT CC/MCC [MS-DRG]: “OTHER DISORDERS OF NERVOUS SYSTEM WITHOUT CC/MCC (MDC 01)”

MDC crossing · procedures (8892)

  • 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.”
  • 0016070 — Bypass Cerebral Ventricle to Nasopharynx with Autologous Tissue Substitute, Open Approach [Same-MDC procedure]: “Bypass Cerebral Ventricle to Nasopharynx with Autologous Tissue Substitute, Open Approach — grouped in MDC 01, the procedure side of this code's crossing.” · check together
  • 0016071 — Bypass Cerebral Ventricle to Mastoid Sinus with Autologous Tissue Substitute, Open Approach [Same-MDC procedure]: “Bypass Cerebral Ventricle to Mastoid Sinus with Autologous Tissue Substitute, Open Approach — grouped in MDC 01, the procedure side of this code's crossing.” · check together
  • 0016072 — Bypass Cerebral Ventricle to Atrium with Autologous Tissue Substitute, Open Approach [Same-MDC procedure]: “Bypass Cerebral Ventricle to Atrium with Autologous Tissue Substitute, Open Approach — grouped in MDC 01, the procedure side of this code's crossing.” · check together
  • 0016073 — Bypass Cerebral Ventricle to Blood Vessel with Autologous Tissue Substitute, Open Approach [Same-MDC procedure]: “Bypass Cerebral Ventricle to Blood Vessel with Autologous Tissue Substitute, Open Approach — grouped in MDC 01, the procedure side of this code's crossing.” · check together
  • 0016074 — Bypass Cerebral Ventricle to Pleural Cavity with Autologous Tissue Substitute, Open Approach [Same-MDC procedure]: “Bypass Cerebral Ventricle to Pleural Cavity with Autologous Tissue Substitute, Open Approach — grouped in MDC 01, the procedure side of this code's crossing.” · check together
  • and 8887 more

Index entries

  • Infarct, infarction, cerebral (acute), postprocedural, following other surgery[Index term]
  • Stroke (apoplectic) (brain) (ischemic) (paralytic), postprocedural, following other surgery[Index term]

Nearest codes (40)

  • I97 — Intraoperative and postprocedural complications and disorders of circulatory system, not elsewhere classified [Sibling]
  • I97.41 — Intraoperative hemorrhage and hematoma of a circulatory system organ or structure complicating a circulatory system procedure [Sibling]
  • I97.410 — Intraoperative hemorrhage and hematoma of a circulatory system organ or structure complicating a cardiac catheterization [Sibling]
  • I97.411 — Intraoperative hemorrhage and hematoma of a circulatory system organ or structure complicating a cardiac bypass [Sibling]
  • I97.418 — Intraoperative hemorrhage and hematoma of a circulatory system organ or structure complicating other circulatory system procedure [Sibling]
  • I97.42 — Intraoperative hemorrhage and hematoma of a circulatory system organ or structure complicating other procedure [Sibling]
  • I97.5 — Accidental puncture and laceration of a circulatory system organ or structure during a procedure [Sibling]
  • I97.51 — Accidental puncture and laceration of a circulatory system organ or structure during a circulatory system procedure [Sibling]
  • and 32 more

Change history (2)

  • FY2017 — Description revised [Change history]
  • and 1 more

Referenced by Other Codes

Clinical classification (AHRQ CCSR):CIR038 — Postprocedural or postoperative circulatory system complication (default); CIR020 — Cerebral infarction.

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

Potential MS-DRG Relationships (FY2026)

CC — 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 58 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 3 MS-DRGs: DRG 091 (MDC 01), DRG 092 (MDC 01), DRG 093 (MDC 01).

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

Official ICD-10-CM tabular notes on other codes that name I97.821 or its code family.

1 Excludes2 notes: G97 (via I97.82.-).

Nearest Codes in This Family

Official ICD-10-CM classifications closest to I97.821 in its code family, with their registry titles.

  • I97.79 — Other intraoperative cardiac functional disturbances
  • I97.790 — Other intraoperative cardiac functional disturbances during cardiac surgery
  • I97.791 — Other intraoperative cardiac functional disturbances during other surgery
  • I97.8 — Other intraoperative and postprocedural complications and disorders of the circulatory system, not elsewhere classified
  • I97.81 — Intraoperative cerebrovascular infarction
  • I97.810 — Intraoperative cerebrovascular infarction during cardiac surgery
  • I97.811 — Intraoperative cerebrovascular infarction during other surgery
  • I97.82 — Postprocedural cerebrovascular infarction
  • I97.820 — Postprocedural cerebrovascular infarction following cardiac surgery
  • I97.88 — Other intraoperative complications of the circulatory system, not elsewhere classified

View all codes in the I97 family

Indexed Clinical Terms (2)

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.

  • Infarct, infarction, cerebral (acute), postprocedural, following other surgery
  • Stroke (apoplectic) (brain) (ischemic) (paralytic), postprocedural, following other surgery