2024 ICD-10-CM Diagnosis Code B35.9

by

Dermatophytosis, unspecified

  • B35.9 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 B35.9 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of B35.9 – other international versions of ICD-10 B35.9 may differ.

Applicable To

  • Ringworm NOS

The following code(s) above B35.9 contain annotation back-references

 that may be applicable to B35.9:

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

Approximate Synonyms

  • Dermatophytosis
  • Dermatophytosis (fungal infection of skin)

Clinical Information

  • Fungal infection of keratinized tissues such as hair, skin and nails. The main causative fungi include microsporum; trichophyton; and epidermophyton.
  • General term describing various dermatophytoses; specific types include tinea capitis (ringworm of the scalp), tinea favosa (of scalp and skin), tinea pedis (athlete’s foot), and tinea unguium (ringworm of the nails).
  • Tinea is the name of a group of diseases caused by a fungus. Types of tinea include ringworm, athlete’s foot and jock itch. These infections are usually not serious, but they can be uncomfortable. You can get them by touching an infected person, from damp surfaces such as shower floors, or even from a pet. Symptoms depend on the affected area of the body:
    • ringworm is a red skin rash that forms a ring around normal-looking skin. A worm doesn’t cause it.
    • scalp ringworm causes itchy, red patches on your head. It can leave bald spots. It usually affects children.
    • athlete’s foot causes itching, burning and cracked skin between your toes.
    • jock itch causes an itchy, burning rash in your groin area.
    over-the-counter creams and powders will get rid of many tinea infections, particularly athlete’s foot and jock itch. Other cases require prescription medicine.

ICD-10-CM B35.9 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):

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

Convert B35.9 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 B35.9:

  • Dermatophytosis (epidermophyton) (infection) (Microsporum) (tinea) (Trichophyton) B35.9
  • Ringworm B35.9
  • Tinea (intersecta) (tarsi) B35.9