Stroke — ICD-10 Coding and Documentation Guidance
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Guidance on ICD-10 coding, documentation, and coding best practices for stroke, transient ischemic attack (TIA), and sequelae; intended for providers and coders who document strokes for Independence Administrators products.
No material clinical or coverage changes in this revision.
Documentation & Coding Criteria for Stroke, TIA, and Sequelae
Stroke coding/documentation criteria
Documentation and coding criteria for strokes, transient ischemic attack (TIA), and sequelae.
Use history or TIA codes when appropriate
- Use Z86.73 for history of stroke when the patient is seen outpatient after a confirmed past stroke with no current deficits.
- Use G45.9 to document a diagnosed TIA (transient ischemic attack) that has resolved.
Relevant ICD-10 Codes and Coding Guidance
| I63.- | Acute ischemic stroke |
| I60.- through I62.- | Hemorrhagic stroke codes |
| I69.- | Sequela of cerebrovascular disease (residuals) |
| G45.9 | Transient ischemic attack (TIA) |
| Z86.73 | History of stroke |
Provider Documentation Requirements & Billing Actions
Do not code unconfirmed stroke in outpatient visits
Do not code suspected or unconfirmed stroke diagnoses in outpatient encounters; assign a confirmed stroke diagnosis only after appropriate diagnostic studies (for example, non-contrast brain CT or brain MRI) have been performed and documentation supports causation and location.
- Focus on coding confirmed conditions or symptoms in outpatient settings rather than unconfirmed or suspected diagnoses.
- Diagnostic studies (e.g., non-contrast brain CT or brain MRI) are typically required to confirm stroke and are usually performed in emergency or inpatient settings.
- Documentation must include causation and location to the highest degree of certainty for codes in I60.-, I61.-, I62.- and I63.-.
Document sequela (I69.-) with explicit linkage to prior stroke
When using sequela codes (I69.-), explicitly document the residual condition and link it to the prior stroke; include details such as the specific residual (e.g., hemiplegia, speech deficit) and the affected side.
- Specify the residual condition being reported.
- Indicate the affected side (dominant or non-dominant) when applicable.
- Explicit linkage between the residual impairment and the prior stroke is required to justify use of I69.- codes.
Key Definitions
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