Q84.6 Other congenital malformations of nails

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

Applicable to

• Congenital clubnail
• Congenital koilonychia
• Congenital malformation of nail NOS

MS-DRG index

Defines the logic of DRG(s) 606-607 in MDC 09.

Approximate ICD-9-CM (GEMs)

• 757.5 Specified anomalies of nails (approximate)

Code annotations containing back-references to Q84.6

Back-references to Q84

• Type 1 Excludes: P83 Other conditions of integument specific to newborn ("congenital malformations of skin and integument (Q80-Q84)")

Diagnosis Index entries for Q84.6

• 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
• 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

Nearby codes

• Q84.1 Congenital morphological disturbances of hair, not elsewhere classified
• Q84.2 Other congenital malformations of hair
• Q84.3 Anonychia
• Q84.4 Congenital leukonychia
• Q84.5 Enlarged and hypertrophic nails
• Q84.6 Other congenital malformations of nails (this code)
• Q84.8 Other specified congenital malformations of integument
• Q84.9 Congenital malformation of integument, unspecified