ICD-10-CM 2027
ICD-10 code for Otomycosis NEC
From the official ICD-10-CM alphabetic index entry “Otomycosis (diffuse) NEC”. Page updated September 29, 2026.
About coding Otomycosis NEC
The ICD-10-CM code for Otomycosis NEC is B36.9 (Superficial mycosis, unspecified). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on B36.9.
Within B36, choose B36.9 (Superficial mycosis, unspecified) only when documentation doesn't support a more specific option: pityriasis versicolor (B36.0), tinea nigra (B36.1), white piedra (B36.2), black piedra (B36.3) and other specified superficial mycoses (B36.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 606 (Minor Skin Disorders with MCC, relative weight 1.5728) and DRG 607 (Minor Skin Disorders without MCC, relative weight 0.8772), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific Otomycosis NEC codes (official index)
Common questions about Otomycosis NEC ICD-10 codes
What is the ICD-10 code for Otomycosis NEC?
- B36.9 — Superficial mycosis, unspecified. More specific codes apply when the documentation supports them: B44.89, B37.84, B37.84.
Is B36.9 billable?
- Yes. B36.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B36.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B36.9 as a principal diagnosis.
Is B36.9 a CC or MCC?
- No. B36.9 is neither a CC nor an MCC under MS-DRG v44.0.