2020 ICD-10-CM Diagnosis Code B35.9

Dermatophytosis, unspecified

    2016 2017 2018 2019 2020 Billable/Specific Code
  • B35.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM B35.9 became effective on October 1, 2019.
  • 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
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to B35.9:
  • A00-B99
    2020 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    Includes
    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • carrier or suspected carrier of infectious disease (Z22.-)
    • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
    • infectious and parasitic diseases specific to the perinatal period (P35-P39)
    • influenza and other acute respiratory infections (J00-J22)
    Use Additional
    • code to identify resistance to antimicrobial drugs (Z16.-)
    Certain infectious and parasitic diseases
  • B35-B49
    2020 ICD-10-CM Range B35-B49

    Mycoses

    Type 2 Excludes
    • hypersensitivity pneumonitis due to organic dust (J67.-)
    • mycosis fungoides (C84.0-)
    Mycoses
  • B35
    ICD-10-CM Diagnosis Code B35

    Dermatophytosis

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Includes
    • favus
    • infections due to species of Epidermophyton, Micro-sporum and Trichophyton
    • tinea, any type except those in B36.-
    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 v37.0):
  • 606 Minor skin disorders with mcc
  • 607 Minor skin disorders without mcc

Convert B35.9 to ICD-9-CM

Code 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

Diagnosis Index entries containing back-references to B35.9:

ICD-10-CM Codes Adjacent To B35.9
B34.9 Viral infection, unspecified
B35 Dermatophytosis
B35.0 Tinea barbae and tinea capitis
B35.1 Tinea unguium
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
B36 Other superficial mycoses
B36.0 Pityriasis versicolor
B36.1 Tinea nigra
B36.2 White piedra
B36.3 Black piedra
B36.8 Other specified superficial mycoses
B36.9 Superficial mycosis, unspecified
B37 Candidiasis
B37.0 Candidal stomatitis
B37.1 Pulmonary candidiasis

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.