ICD-10 Code B35.6 – Tinea cruris (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B35.6 – Tinea cruris
What it is
B35.6 identifies tinea cruris, a superficial fungal infection of the groin and adjacent inner thigh. It is commonly called jock itch and is caused by dermatophytes.
Clinical signs
Typical findings include an itchy, red, scaly rash in the groin with a well-defined border. The scrotum is often spared; clinical features vary, so refer to documentation.
When to use this code
Use B35.6 when the provider documents tinea cruris, groin ringworm, or jock itch. Code it for confirmed dermatophyte infection of the inguinal area, including recurrent or persistent cases when documented as tinea cruris.
Do not use for
Do not use this code for nonspecific groin rash, intertrigo, candidiasis, or dermatitis unless the record specifically identifies tinea cruris. Check documentation if the cause is unclear.
Coding tip
Assign B35.6 only when the fungal diagnosis is documented; if the note says “rash” alone, query or code the documented symptom instead.