ICD-10-CM 2027
ICD-10 code for Megalophthalmos
From the official ICD-10-CM alphabetic index entry “Megalophthalmos”. Page updated September 29, 2026.
About coding Megalophthalmos
The ICD-10-CM code for Megalophthalmos is Q11.3 (Macrophthalmos).
Within Q11 (anophthalmos, microphthalmos and macrophthalmos), Q11.3 is specifically for macrophthalmos. Related codes cover cystic eyeball (Q11.0), other anophthalmos (Q11.1) and microphthalmos (Q11.2).
Don't report Q11.3 together with the conditions in its Excludes1 note: macrophthalmos in congenital glaucoma (Q15.0).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Don't confuse with (Excludes1 for Q11.3)
- macrophthalmos in congenital glaucoma (Q15.0)
Common questions about Megalophthalmos ICD-10 codes
What is the ICD-10 code for Megalophthalmos?
- Q11.3 — Macrophthalmos.
Is Q11.3 billable?
- Yes. Q11.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q11.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q11.3 as a principal diagnosis.
Is Q11.3 a CC or MCC?
- No. Q11.3 is neither a CC nor an MCC under MS-DRG v44.0.