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ICD-10-CM 2027

ICD-10 code for coloboma

Q13.0

Coloboma of iris

✓ Billable / specific

From the official ICD-10-CM alphabetic index entry “Coloboma (iris)”. Page updated September 29, 2026.

About coding coloboma

The ICD-10-CM code for coloboma is Q13.0 (Coloboma of iris). The official index lists 5 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on Q13.0.

Within Q13 (congenital malformations of anterior segment of eye), Q13.0 is specifically for coloboma of iris. Related codes cover absence of iris (Q13.1), other congenital malformations of iris (Q13.2), 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 coloboma codes (official index)

  • eyelid Q10.3 — Other congenital malformations of eyelid
  • fundus Q14.8 — Other congenital malformations of posterior segment of eye
  • lens Q12.2 — Coloboma of lens
  • optic disc (congenital) Q14.2 — Congenital malformation of optic disc
  • acquired H47.31 — Coloboma of optic disc

Common questions about coloboma ICD-10 codes

What is the ICD-10 code for coloboma?

Q13.0 — Coloboma of iris. More specific codes apply when the documentation supports them: Q10.3, Q14.8, Q12.2, Q14.2 and others below.

What is the ICD-10 code for eyelid coloboma?

Q10.3 — Other congenital malformations of eyelid.

What is the ICD-10 code for fundus coloboma?

Q14.8 — Other congenital malformations of posterior segment of eye.

What is the ICD-10 code for lens coloboma?

Q12.2 — Coloboma of lens.

What is the ICD-10 code for optic disc coloboma?

Q14.2 — Congenital malformation of optic disc.

Is Q13.0 billable?

Yes. Q13.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can Q13.0 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict Q13.0 as a principal diagnosis.

Is Q13.0 a CC or MCC?

No. Q13.0 is neither a CC nor an MCC under MS-DRG v44.0.