ICD-10-CM 2027
ICD-10 code for microphthalmos
From the official ICD-10-CM alphabetic index entry “Microphthalmos, microphthalmia (congenital)”. Page updated September 29, 2026.
About coding microphthalmos
The ICD-10-CM code for microphthalmos is Q11.2 (Microphthalmos). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on Q11.2.
Within Q11 (anophthalmos, microphthalmos and macrophthalmos), Q11.2 is specifically for microphthalmos. Related codes cover cystic eyeball (Q11.0), other anophthalmos (Q11.1) and macrophthalmos (Q11.3).
Don't report Q11.2 together with the conditions in its Excludes1 note: cryptophthalmos syndrome (Q87.0).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific microphthalmos codes (official index)
- due to toxoplasmosis P37.1 — Congenital toxoplasmosis
Don't confuse with (Excludes1 for Q11.2)
- cryptophthalmos syndrome (Q87.0)
Common questions about microphthalmos ICD-10 codes
What is the ICD-10 code for microphthalmos?
- Q11.2 — Microphthalmos. More specific codes apply when the documentation supports them: P37.1.
Is Q11.2 billable?
- Yes. Q11.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q11.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q11.2 as a principal diagnosis.
Is Q11.2 a CC or MCC?
- No. Q11.2 is neither a CC nor an MCC under MS-DRG v44.0.