2024 ICD-10-CM Diagnosis Code B35.1

by

Tinea unguium

  • B35.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2024 edition of ICD-10-CM B35.1 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of B35.1 – other international versions of ICD-10 B35.1 may differ.

Applicable To

  • Dermatophytic onychia
  • Dermatophytosis of nail
  • Onychomycosis
  • Ringworm of nails

The following code(s) above B35.1 contain annotation back-references

 that may be applicable to B35.1:

  • A00-B99  Certain infectious and parasitic diseases
  • B35-B49  Mycoses
  • B35  Dermatophytosis

Approximate Synonyms

  • Onychomycosis
  • Onychomycosis (nail fungal infection)
  • Onychomycosis/dystrophy
  • Total dystrophic onychomycosis

Clinical Information

  • A fungal infection of the nail, usually caused by dermatophytes; yeasts; or nondermatophyte molds.

ICD-10-CM B35.1 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):

  • 606 Minor skin disorders with mcc
  • 607 Minor skin disorders without mcc

Convert B35.1 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change

Diagnosis Index entries containing back-references to B35.1: