ICD-10-CM 2027
ICD-10 code for Anonychia
From the official ICD-10-CM alphabetic index entry “Anonychia (congenital)”. Page updated September 29, 2026.
About coding Anonychia
The ICD-10-CM code for Anonychia is Q84.3 (Anonychia). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on Q84.3.
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.
More specific Anonychia codes (official index)
- acquired L60.8 — Other nail disorders
Don't confuse with (Excludes1 for Q84.3)
- nail patella syndrome (Q87.2)
Common questions about Anonychia ICD-10 codes
What is the ICD-10 code for Anonychia?
- Q84.3 — Anonychia. More specific codes apply when the documentation supports them: L60.8.
What is the ICD-10 code for acquired anonychia?
- L60.8 — Other nail disorders.
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.