I97.12 ICD-10-CM Code: Postprocedural cardiac arrest

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for I97.12 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 I97.12 itself; “inherited from” names the category or block whose note applies here.

Coder workflow for I97.12

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

Before you code I97.12

1. I97.12 is not reportable as written. Select the more specific code beneath it that the documentation supports. Codes are reported to the highest level of specificity the classification provides (Guidelines I.B.2).

   ReviewI97.120, I97.121

   See the relationships section · Guide: How to choose an ICD-10-CM code →

Choose the right path

1. Does the documentation support one of the more specific codes beneath I97.12?
   Yes → Select that code and continue the checks below on its own page.
   No → I97.12 cannot be reported as written; query for the specificity its subcategory needs.

   ReviewI97.120, I97.121

Consider I97.12. Then 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).

Official instructions as workflow

• Excludes2 — not part of I97.12(3 notes)

  Coding workflow: The conditions named in this note are not included in I97.12. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

  CompareJ95.1, I97.7, T81.1

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

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.

Don’t confuse I97.12 with…

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

The codes most likely to be picked instead of I97.12 — 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.

• J95.1— 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 acute pulmonary insufficiency following thoracic surgery adds J95.1; it is not part of this code and both may be reported when both are documented.

  Full comparison: I97.12 vs J95.1 →

• I97.7— 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 intraoperative cardiac functional disturbances adds I97.7; it is not part of this code and both may be reported when both are documented.

  Full comparison: I97.12 vs I97.7 →

• T81.1— 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 postprocedural shock adds T81.1; it is not part of this code and both may be reported when both are documented.

  Full comparison: I97.12 vs T81.1 →

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.

Verify Before Coding

• Not billable as written — a more specific code is required: I97.120, I97.121.

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 I97.12 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 14 Excludes2 notes across 3 chapters: I97.7 — Intraoperative cardiac functional disturbances (via I97.1.-), J95.1 — Acute pulmonary insufficiency following thoracic surgery (via I97.1.-), J95.2 — Acute pulmonary insufficiency following nonthoracic surgery (via I97.1.-), J95.3 — Chronic pulmonary insufficiency following surgery (via I97.1.-), T80 — Complications following infusion, transfusion and therapeutic injection (via I97.-), T80-T88 — Complications of surgical and medical care, not elsewhere classified (T80-T88) (via I97.-), T81 — Complications of procedures, not elsewhere classified (via I97.-), T82 — Complications of cardiac and vascular prosthetic devices, implants and grafts (via I97.-), T83 — Complications of genitourinary prosthetic devices, implants and grafts (via I97.-), T84 — Complications of internal orthopedic prosthetic devices, implants and grafts (via I97.-), T85 — Complications of other internal prosthetic devices, implants and grafts (via I97.-), T86 — Complications of transplanted organs and tissue (via I97.-), T87 — Complications peculiar to reattachment and amputation (via I97.-), T88 — Other complications of surgical and medical care, not elsewhere classified (via I97.-).

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

Related Codes

Same Index main term, other category

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

I45.5 — Other specified heart block (sinus), I46.2 — Cardiac arrest due to underlying cardiac condition (cardiac, due to, cardiac condition), I46.8 — Cardiac arrest due to other underlying condition (cardiac, due to, specified condition NEC), I46.9 — Cardiac arrest, cause unspecified (cardiac), M89.12 — Physeal arrest, humerus (epiphyseal, partial, humerus), M89.13 — Physeal arrest, forearm (epiphyseal, forearm), M89.15 — Physeal arrest, femur (epiphyseal, partial, femur), M89.16 — Physeal arrest, lower leg (epiphyseal, lower leg), M89.168 — Other physeal arrest of lower leg (epiphyseal, lower leg, specified NEC), M89.18 — Physeal arrest, other site (epiphyseal, specified NEC), O29.11 — Cardiac arrest due to anesthesia during pregnancy (cardiac, complicating, anesthesiaor other sedation, in pregnancy), O64.0 — Obstructed labor due to incomplete rotation of fetal head (transverse), O74.2 — Cardiac complications of anesthesia during labor and delivery (cardiac, complicating, anesthesiaor other sedation, in labor and delivery), O75.4 — Other complications of obstetric surgery and procedures (cardiac, complicating, delivery), O89.1 — Cardiac complications of anesthesia during the puerperium (cardiac, complicating, anesthesiaor other sedation, postpartum, puerperal), P28.81 — Respiratory arrest of newborn (respiratory, newborn), P29.81 — Cardiac arrest of newborn (cardiac, newborn), Q32.1 — Other congenital malformations of trachea (development or growth, tracheal rings), R09.2 — Respiratory arrest (respiratory), R62.50 — Unspecified lack of expected normal physiological development in childhood (development or growth, child), +2 more

Contextual Map

Every relationship of I97.12 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 I97.12 with these 8 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
• I95-I99 — Other and unspecified disorders of the circulatory system[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026

Referenced by Excludes2 notes (14)

• I97.7 — Intraoperative cardiac functional disturbances[Excludes2](via I97.1.-): “postprocedural cardiac functional disturbances (I97.1-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• J95.1 — Acute pulmonary insufficiency following thoracic surgery[Excludes2](via I97.1.-): “Functional disturbances following cardiac surgery (I97.0, I97.1-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• J95.2 — Acute pulmonary insufficiency following nonthoracic surgery[Excludes2](via I97.1.-): “Functional disturbances following cardiac surgery (I97.0, I97.1-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• J95.3 — Chronic pulmonary insufficiency following surgery[Excludes2](via I97.1.-): “Functional disturbances following cardiac surgery (I97.0, I97.1-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• T80 — Complications following infusion, transfusion and therapeutic injection[Excludes2](via I97.-): “functional disturbances following cardiac surgery (I97.0-I97.1)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• T80-T88 — Complications of surgical and medical care, not elsewhere classified (T80-T88)[Excludes2](via I97.-): “functional disturbances following cardiac surgery (I97.0-I97.1)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• T81 — Complications of procedures, not elsewhere classified[Excludes2](via I97.-): “functional disturbances following cardiac surgery (I97.0-I97.1)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• T82 — Complications of cardiac and vascular prosthetic devices, implants and grafts[Excludes2](via I97.-): “functional disturbances following cardiac surgery (I97.0-I97.1)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• and 6 more

Nearest codes (40)

• I97 — Intraoperative and postprocedural complications and disorders of circulatory system, not elsewhere classified[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I97.0 — Postcardiotomy syndrome[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I97.1 — Other postprocedural cardiac functional disturbances[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I97.11 — Postprocedural cardiac insufficiency[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I97.110 — Postprocedural cardiac insufficiency following cardiac surgery[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I97.111 — Postprocedural cardiac insufficiency following other surgery[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I97.120 — Postprocedural cardiac arrest following cardiac surgery[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I97.121 — Postprocedural cardiac arrest following other surgery[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• and 32 more

Change history

• FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Common coding questions

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

Claim edits Official source data

CMS Definitions of Medicare Code Edits — v43.1 (April 2026) 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.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Nearest Codes in This Family

Official ICD-10-CM classifications closest to I97.12 in its code family, with their registry titles.

• I97.0 — Postcardiotomy syndrome
• I97.1 — Other postprocedural cardiac functional disturbances
• I97.11 — Postprocedural cardiac insufficiency
• I97.110 — Postprocedural cardiac insufficiency following cardiac surgery
• I97.111 — Postprocedural cardiac insufficiency following other surgery
• I97.120 — Postprocedural cardiac arrest following cardiac surgery
• I97.121 — Postprocedural cardiac arrest following other surgery
• I97.13 — Postprocedural heart failure
• I97.130 — Postprocedural heart failure following cardiac surgery
• I97.131 — Postprocedural heart failure following other surgery

View all codes in the I97 family