What is the ICD-10 code for a transient ischemic attack?

The ICD-10 code for a transient ischemic attack is G45.9, used for episodes of neurological dysfunction without acute infarction evidence.

How do you document a TIA?

Document the symptom onset, duration, resolution, and imaging results to support the TIA diagnosis. Ensure symptoms resolve within 24 hours without infarction evidence.

ICD-10 Coding for Transient Ischemic Attack (TIA)(G45.9, G45.0, I63.0)

Save

Learn about the ICD-10 coding for transient ischemic attacks, including documentation requirements and common coding pitfalls.

Also known as:

Mini-strokeTemporary strokeCerebral ischemic attack

Related ICD-10 Code Ranges

Complete code families applicable to Transient Ischemic Attack (TIA)

G00-G99Primary Range

Diseases of the nervous system

→

Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

Code	Description	When to Use	Key Documentation
G45.9	Transient ischemic attack, unspecified	Use for episodes of neurological dysfunction without acute infarction evidence.	Sudden onset of neurological symptoms resolving within 24 hours Negative imaging for acute infarction
I63.9	Cerebral infarction, unspecified	Use for confirmed acute infarction with imaging evidence.	Imaging evidence of acute infarction Persistent neurological deficits

Primary ICD-10-CM Codes

Transient cerebral ischemic attack, unspecified

G45.9Billable

Differential Codes

Alternative codes to consider when ruling out similar conditions

Cerebral infarction, unspecifiedI63.9

Transient ischemic attack, unspecifiedG45.9

Documentation & Coding Risks

Avoid these common issues when documenting Transient Ischemic Attack (TIA).

Failure to document imaging results

Impact

Clinical: May lead to misdiagnosis of stroke vs. TIA, Regulatory: Non-compliance with coding guidelines, Financial: Potential for claim denials

Mitigation

Ensure imaging results are included in the medical record, Verify documentation before coding

Using acute stroke codes for resolved TIAs

Impact

Reimbursement: Incorrect coding may lead to denied claims., Compliance: Misclassification affects compliance with coding guidelines., Data Quality: Impacts accuracy of patient records and data reporting.

Mitigation

Ensure documentation specifies symptom resolution and imaging findings.

Imaging Documentation

Impact

Lack of imaging documentation for TIA claims

Mitigation

Implement checklist for imaging documentation in TIA cases

Frequently Asked Questions

Documentation requirements, coding pitfalls and FAQs for conditions coded with G45.9.

Primary Code

G45.9

Transient cerebral ischemic attack, unspecified

Quick Navigation

ICD-10 codes7

Coding risks3

FAQs2

ICD-10 Coding for Transient Ischemic Attack (TIA)(G45.9, G45.0, I63.0)

Documentation & Coding Risks

Frequently Asked Questions

What is the ICD-10 code for a transient ischemic attack?

How do you document a TIA?

Related condition guides