ICD10BillableValid for clinical use

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

I97.821 is a billable ICD-10 diagnosis code used to classify Postprocedural cerebrovascular infarction following other surgery in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the circulatory system (I00-I99).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the circulatory system (I00-I99).

When is it used?

  • May be used when a clinician documents postprocedural cerebrovascular infarction following other surgery in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
9Diseases of the circulatory system (I00-I99)
block
I95-I99Other and unspecified disorders of the circulatory system
category
I97Intraoperative and postprocedural complications and disorders of circulatory system, not elsewhere classified
category
I97.8Other intraoperative and postprocedural complications and disorders of the circulatory system, not elsewhere classified
category
I97.82Postprocedural cerebrovascular infarction
currentI97.82

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

CardiologistGeneral Physician

Coverage-related procedures and services

CPT 93880high
DUPLEX SCAN OF EXTRACRANIAL ARTERIES; COMPLETE BILATERAL STUDY
Source: CMS coverage guidance
CPT 93882high
DUPLEX SCAN OF EXTRACRANIAL ARTERIES; UNILATERAL OR LIMITED STUDY
Source: CMS coverage guidance
CPT 36222high
SELECTIVE CATHETER PLACEMENT, COMMON CAROTID OR INNOMINATE ARTERY, UNILATERAL, ANY APPROACH, WITH ANGIOGRAPHY OF THE IPSILATERAL EXTRACRANIAL CAROTID CIRCULATION AND ALL ASSOCIATED RADIOLOGICAL SUPERVISION AND INTERPRETATION, INCLUDES ANGIOGRAPHY OF THE CERVICOCEREBRAL ARCH, WHEN PERFORMED
Source: CMS coverage guidance
CPT 36223high
SELECTIVE CATHETER PLACEMENT, COMMON CAROTID OR INNOMINATE ARTERY, UNILATERAL, ANY APPROACH, WITH ANGIOGRAPHY OF THE IPSILATERAL INTRACRANIAL CAROTID CIRCULATION AND ALL ASSOCIATED RADIOLOGICAL SUPERVISION AND INTERPRETATION, INCLUDES ANGIOGRAPHY OF THE EXTRACRANIAL CAROTID AND CERVICOCEREBRAL ARCH, WHEN PERFORMED
Source: CMS coverage guidance
CPT 36228high
SELECTIVE CATHETER PLACEMENT, EACH INTRACRANIAL BRANCH OF THE INTERNAL CAROTID OR VERTEBRAL ARTERIES, UNILATERAL, WITH ANGIOGRAPHY OF THE SELECTED VESSEL CIRCULATION AND ALL ASSOCIATED RADIOLOGICAL SUPERVISION AND INTERPRETATION (EG, MIDDLE CEREBRAL ARTERY, POSTERIOR INFERIOR CEREBELLAR ARTERY) (LIST SEPARATELY IN ADDITION TO CODE FOR PRIMARY PROCEDURE)
Source: CMS coverage guidance
CPT 36227high
SELECTIVE CATHETER PLACEMENT, EXTERNAL CAROTID ARTERY, UNILATERAL, WITH ANGIOGRAPHY OF THE IPSILATERAL EXTERNAL CAROTID CIRCULATION AND ALL ASSOCIATED RADIOLOGICAL SUPERVISION AND INTERPRETATION (LIST SEPARATELY IN ADDITION TO CODE FOR PRIMARY PROCEDURE)
Source: CMS coverage guidance

Coding guidelines

Common synonyms

Postprocedural cerebrovascular infarction following other surgery

Frequently asked questions

Code details

CodeI97.821
SystemICD10
Display namePostprocedural cerebrovascular infarction following other surgery
ChapterDiseases of the circulatory system (I00-I99)
BlockOther and unspecified disorders of the circulatory system

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Infarct, infarctionStroke(apoplectic) (brain) (ischemic) (paralytic)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code I97.821 for Postprocedural cerebrovascular infarction following other surgery | HealthAssure