Q84.6
Other congenital malformations of nails
Q84.6 (also written Q846) is a billable ICD-10-CM diagnosis code for other congenital malformations of nails. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 9 codes in category Q84 (Other congenital malformations of integument). The Alphabetic Index lists it under 26 entries. Its coding notes include 1 Excludes2 entry.
Guidelines tip
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
Chapter 17 codes can be used for life. Manifestations that are an inherent part of a specifically coded anomaly are not coded separately. A corrected malformation is reported with a personal history code.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (1 note)
- inborn errors of metabolism (E70-E88)
Inclusion terms
Conditions classified to this code.
- Congenital clubnail
- Congenital koilonychia
- Congenital malformation of nail NOS
Notes
Also from chapter/block level (1 note)
- Codes from this chapter are not for use on maternal records
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 26 entries
- Anomaly, anomalous (congenital) (unspecified type), nail
- Atrophia, unguium, congenita
- Brittle, nails, congenital
- Clubnail, congenital
- Deformity, nail (acquired), congenital
- Displacement, displaced, nail (congenital)
- Dystrophy, dystrophia, nail, congenital
- Dystrophy, dystrophia, unguium, congenital
- Egg shell nails, congenital
- Eponychia
- Fragilitas, unguium, congenital
- Furrowed, nail (s) (transverse), congenital
Show 14 more
- Horn, nail, congenital
- Hypoplasia, hypoplastic, nail (s)
- Koilonychia, congenital
- Longitudinal stripes or grooves, nails, congenital
- Malformation (congenital), nail
- Malposition, congenital, nail (s)
- Onychodystrophy, congenital
- Onychorrhexis, congenital
- Persistence, persistent (congenital), nail (s), anomalous
- Platyonychia (congenital)
- Polyunguia
- Remnant, fingernail, congenital
- Spading nail, congenital
- Spoon nail, congenital