ICD-10-CM 2027
ICD-10 code for nail s agenesis
From the official ICD-10-CM alphabetic index entry “Agenesis › nail (s)”. Page updated September 29, 2026.
About coding nail s agenesis
The ICD-10-CM code for nail s agenesis is Q84.3 (Anonychia).
Within Q84 (other congenital malformations of integument), Q84.3 is specifically for Anonychia. Related codes cover congenital alopecia (Q84.0), congenital morphological disturbances of hair, not elsewhere classified (Q84.1), other congenital malformations of hair (Q84.2), congenital leukonychia (Q84.4), enlarged and hypertrophic nails (Q84.5), other congenital malformations of nails (Q84.6), other specified congenital malformations of integument (Q84.8) and congenital malformation of integument, unspecified (Q84.9).
Don't report Q84.3 together with the conditions in its Excludes1 note: nail patella syndrome (Q87.2).
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 Q84.3)
- nail patella syndrome (Q87.2)
Common questions about nail s agenesis ICD-10 codes
What is the ICD-10 code for nail s agenesis?
- Q84.3 — Anonychia.
Is Q84.3 billable?
- Yes. Q84.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q84.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q84.3 as a principal diagnosis.
Is Q84.3 a CC or MCC?
- No. Q84.3 is neither a CC nor an MCC under MS-DRG v44.0.