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ICD-10 Coding for Anisocoria(H57.02, G90.2, H21.56)

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Learn about the ICD-10 coding for anisocoria, including documentation requirements and related conditions like Horner syndrome.

Also known as:
Unequal Pupil SizePupillary Asymmetry
Related ICD-10 Code Ranges

Complete code families applicable to Anisocoria

H00-H59Primary Range

Diseases of the eye and adnexa

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Primary ICD-10-CM Codes
Anisocoria
H57.02Billable
Differential Codes

Alternative codes to consider when ruling out similar conditions

Coloboma of irisQ13.0
Pupillary abnormality NECH21.56

Documentation & Coding Risks

Avoid these common issues when documenting Anisocoria.

Omitting documentation of pharmacologic testing.

Impact

Clinical: Inaccurate diagnosis of underlying conditions., Regulatory: Potential for audit issues., Financial: Risk of claim denials.

Mitigation

Ensure all pharmacologic tests are documented.

Using H57.02 alone for Horner syndrome.

Impact

Reimbursement: Incorrect coding may lead to denied claims., Compliance: Non-compliance with coding guidelines., Data Quality: Inaccurate clinical data representation.

Mitigation

Add G90.2 for Horner syndrome and document supporting tests.

Incomplete documentation

Impact

Lack of detailed pupil examination findings.

Mitigation

Implement standardized documentation templates.

Frequently Asked Questions

Related condition guides

Documentation requirements, coding pitfalls and FAQs for conditions coded with H57.02.