H21.56
Non-billablePupillary abnormalities
H21.56 is the ICD-10-CM code for Pupillary abnormalities. It is a non-billable category code — use a more specific child code such as H21.561 for billing.
H00-H59 Diseases of the eye and adnexa
Includes
- •Deformed pupil
- •Ectopic pupil
- •Rupture of sphincter, pupil
Excludes1 — not coded here
- •congenital deformity of pupil (Q13.2-)
Frequently asked questions
- What is ICD-10 code H21.56?
- H21.56 is the ICD-10-CM code for "Pupillary abnormalities". It falls under H00-H59 Diseases of the eye and adnexa.
- Is H21.56 a billable code?
- No — H21.56 is a non-billable header code. Use a more specific child code (such as H21.561) for billing.
- What are the subcodes of H21.56?
- H21.56 has 4 more specific child codes, including H21.561, H21.562, H21.563.
- What is excluded from H21.56?
- Excludes1 (not coded here): congenital deformity of pupil (Q13.2-).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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