MCMedicalCodingSoftware
Q84.5

Q84.5: Enlarged and hypertrophic nails

Billable / specific codeICD-10-CMPOA exempt

Q84.5 is a billable, specific ICD-10-CM code for enlarged and hypertrophic nails. It is valid for submission on a claim.

Check Q84.5 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Congenital onychauxis
  • Pachyonychia

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

Q84.5 is named in 4 Medicare coverage policies: 4 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A52998Billing and Coding: Surgical Treatment of Nails
  • A57666Billing and Coding: Surgical Treatment of Nails
  • A59028Billing and Coding: Surgical Treatment of Nails
  • A60545Billing and Coding: Surgical Treatment of Nails

Alphabetic index entries that lead here

  • Pachyonychia(congenital)
  • Onychauxis›congenital
  • Hypertrophy, hypertrophic›nail›congenital
  • Thickening›nail›congenital

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under Q84

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.