ICD-10 Code B37.2 – Candidiasis of skin and nail (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B37.2 – Candidiasis of skin and nail
What it is
B37.2 identifies a Candida infection affecting the skin or nails. Use it when documentation states cutaneous candidiasis, candidal intertrigo, or Candida involvement of the nail unit.
Clinical signs
Findings often include erythematous, moist, macerated skin in skin folds, sometimes with satellite lesions. Nail involvement may show discoloration, thickening, or dystrophic change; clinical features vary, refer to documentation.
When to use this code
Use B37.2 when the provider documents Candida infection limited to skin or nails, including intertriginous areas, perineal folds, or periungual disease. Code it when the record clearly identifies candidiasis rather than a nonspecific rash or dermatitis. If the site or organism is not documented, check documentation.
Do not use for
Do not use this code for oral, esophageal, vulvovaginal, or systemic candidiasis. Avoid it when the note describes another fungal infection or an unspecified skin eruption without Candida.
Coding tip
Look for the word “Candida” in the assessment and match the documented site before assigning B37.2.