ICD-10 Code B37 – Candidiasis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B37 – Candidiasis
What it is
B37 identifies candidiasis, an infection caused by Candida species. Use it when the record documents Candida infection without a more specific site or subtype.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include mucosal irritation, white plaques, rash, itching, or other site-specific signs of Candida infection.
When to use this code
Use B37 when the provider documents candidiasis and does not specify a more precise codeable site or form. It may apply to oral, skin, genital, or systemic Candida infection only if the chart supports the nonspecific diagnosis. Review the note for location and specificity before assigning this code.
Do not use for
Do not use B37 when the record identifies a more specific candidiasis code or a non-Candida condition. Check documentation if the diagnosis is colonization, carrier status, or an unrelated fungal infection.
Coding tip
Code the most specific Candida site documented; reserve B37 for nonspecific candidiasis only.