ICD-10-CM 2027
ICD-10 code for pupil anomaly
From the official ICD-10-CM alphabetic index entry “Anomaly, anomalous (congenital) (unspecified type) › pupil”. Page updated September 29, 2026.
About coding pupil anomaly
The ICD-10-CM code for pupil anomaly is Q13.2 (Other congenital malformations of iris). The official index lists 7 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on Q13.2.
Within Q13, choose Q13.2 (Other congenital malformations of iris) only when documentation doesn't support a more specific option: coloboma of iris (Q13.0), absence of iris (Q13.1), congenital corneal opacity (Q13.3), other congenital corneal malformations (Q13.4), Blue sclera (Q13.5), other congenital malformations of anterior segment of eye (Q13.8) and congenital malformation of anterior segment of eye, unspecified (Q13.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 124 (Other Disorders of the Eye with MCC or Thrombolytic Agent, relative weight 1.2471) and DRG 125 (Other Disorders of the Eye without MCC, relative weight 0.7702), in MDC 02 (Diseases and Disorders of the Eye), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific pupil anomaly codes (official index)
- function H57.00 — Unspecified anomaly of pupillary function
- anisocoria H57.02 — Anisocoria
- Argyll Robertson pupil H57.01 — Argyll Robertson pupil, atypical
- miosis H57.03 — Miosis
- mydriasis H57.04 — Mydriasis
- specified type NEC H57.09 — Other anomalies of pupillary function
- tonic pupil H57.05 — Tonic pupil
Common questions about pupil anomaly ICD-10 codes
What is the ICD-10 code for pupil anomaly?
- Q13.2 — Other congenital malformations of iris. More specific codes apply when the documentation supports them: H57.00, H57.02, H57.01, H57.03 and others below.
What is the ICD-10 code for function pupil anomaly?
- H57.00 — Unspecified anomaly of pupillary function.
Is Q13.2 billable?
- Yes. Q13.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q13.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q13.2 as a principal diagnosis.
Is Q13.2 a CC or MCC?
- No. Q13.2 is neither a CC nor an MCC under MS-DRG v44.0.