B35.9 – Dermatophytosis, unspecified
ICD-10-CM 2027 diagnosis code · Mycoses
ICD-10-CM code
B35.9
- Code
B35.9(claims format:B359)- Description
- Dermatophytosis, unspecified
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 1. Certain infectious and parasitic diseases (A00-B99)
- Block
- B35-B49 Mycoses
- Parent codes
- B35
Notes for B35.9
Applicable to:
- Ringworm NOS
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
B35 – Dermatophytosis
Includes:
- favus
- infections due to species of Epidermophyton, Micro-sporum and Trichophyton
- tinea, any type except those in B36.-
Block B35-B49
Index terms for B35.9
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in B35
- B35.0 – Tinea barbae and tinea capitisBillable
- B35.1 – Tinea unguiumBillable
- B35.2 – Tinea manuumBillable
- B35.3 – Tinea pedisBillable
- B35.4 – Tinea corporisBillable
- B35.5 – Tinea imbricataBillable
- B35.6 – Tinea crurisBillable
- B35.8 – Other dermatophytosesBillable
Frequently asked questions
What is ICD-10 code B35.9?
B35.9 is the ICD-10-CM code for dermatophytosis, unspecified, in the block B35-B49 (Mycoses).
Is B35.9 a billable code?
Yes. B35.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does B35.9 belong to?
It belongs to category B35 – Dermatophytosis.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.