Diagnosis Code


Code Information

Diagnosis Code: B35.1

Short Description: Tinea unguium

Long Description: Tinea unguium

The code B35.1 is VALID for claim submission

Code Classification:

  • Certain infectious and parasitic diseases (A00–B99)
    • Mycoses (B35-B49)
      • Dermatophytosis (B35)
        • B35.1 Tinea unguium

Code Version: 2020 ICD-10-CM


  • Distal and lateral subungual onychomycosis
  • Endonyx onychomycosis
  • Fusarium infection
  • Infection caused by Scytalidium
  • Infection of toenail
  • Nail bed infection
  • Nail bed infection
  • Onycholysis
  • Onycholysis due to fungal infection of nail
  • Onychomycosis
  • Onychomycosis caused by Acremonium
  • Onychomycosis caused by Neoscytalidium dimidiatum
  • Onychomycosis due to Botryodiplodia theobromae
  • Onychomycosis due to Curvularia lunata
  • Onychomycosis due to dermatophyte
  • Onychomycosis due to Epidermophyton floccosum
  • Onychomycosis due to Fusarium
  • Onychomycosis due to mold infection
  • Onychomycosis due to Onychocola canadensis
  • Onychomycosis due to opportunistic infection
  • Onychomycosis due to Pseudeurotium ovale
  • Onychomycosis due to Pyrenochaeta unguis hominis
  • Onychomycosis due to Scopulariopsis brevicaulis
  • Onychomycosis due to Scytalidium hyalinum
  • Onychomycosis due to Trichophyton interdigitale
  • Onychomycosis due to Trichophyton mentagrophytes
  • Onychomycosis due to Trichophyton rubrum
  • Onychomycosis due to Trichophyton schoenleinii
  • Onychomycosis due to Trichophyton soudanense
  • Onychomycosis due to Trichophyton tonsurans
  • Onychomycosis due to Trichophyton violaceum
  • Onychomycosis of nail of digit
  • Onychomycosis of toenails
  • Proximal subungual onychomycosis
  • Superficial white onychomycosis
  • Tinea due to Trichophyton rubrum
  • Total dystrophic onychomycosis

Diagnostic Related Group(s)

The code B35.1 is grouped in the following Diagnostic Related Group(s) (MS-DRG v37.0)
  • Minor Skin Disorders With Mcc (606)
  • Minor Skin Disorders Without Mcc (607)

References to Index of Diseases and Injuries

The code B35.1 has the following ICD-10-CM references to the Index of Diseases and Injuries
  • Inclusion Terms:
    • Dermatophytic onychia
    • Dermatophytosis of nail
    • Onychomycosis
    • Ringworm of nails

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
B35.1 Right Arrow 110.1 Dermatophytosis of nail

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
B35 Dermatophytosis
B35.0 Tinea barbae and tinea capitis
B35.2 Tinea manuum
B35.3 Tinea pedis
B35.4 Tinea corporis
B35.5 Tinea imbricata
B35.6 Tinea cruris
B35.8 Other dermatophytoses
B35.9 Dermatophytosis, unspecified

This page was last updated on: 10/1/2019