Tinea cruris

This code represents a superficial fungal infection of the groin area, commonly known as "jock itch." It is characterized by an itchy, red, often ring-shaped rash that typically affects the inner thighs, perineum, and buttocks. The infection is caused by dermatophytes, fungi that thrive in warm, moist environments.

Use this code when documentation explicitly states a diagnosis of tinea cruris or jock itch. This diagnosis is typically made based on clinical presentation, but may be supported by microscopic examination of skin scrapings (KOH prep) or fungal culture.

• Differentiate from other dermatophyte infections; ensure the documentation specifies the groin area.
• Do not confuse with candidiasis of the skin (B37.2), which is a yeast infection and presents differently.
• Code any associated symptoms, such as pruritus (L29.x), as secondary diagnoses if documented.