ICD-10-CM 2027
ICD-10 code for myiasis
From the official ICD-10-CM alphabetic index entry “Myiasis (cavernous)”. Page updated September 29, 2026.
About coding myiasis
The ICD-10-CM code for myiasis is B87.9 (Myiasis, unspecified). The official index lists 16 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on B87.9.
Within B87, choose B87.9 (unspecified) only when documentation doesn't support a more specific option: cutaneous myiasis (B87.0), wound myiasis (B87.1), ocular myiasis (B87.2), nasopharyngeal myiasis (B87.3), Aural myiasis (B87.4) and of other sites (B87.8).
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 myiasis codes (official index)
- aural B87.4 — Aural myiasis
- creeping B87.0 — Cutaneous myiasis
- cutaneous B87.0 — Cutaneous myiasis
- dermal B87.0 — Cutaneous myiasis
- ear (external) (middle) B87.4 — Aural myiasis
- eye B87.2 — Ocular myiasis
- genitourinary B87.81 — Genitourinary myiasis
- intestinal B87.82 — Intestinal myiasis
- laryngeal B87.3 — Nasopharyngeal myiasis
- nasopharyngeal B87.3 — Nasopharyngeal myiasis
- ocular B87.2 — Ocular myiasis
- orbit B87.2 — Ocular myiasis
- skin B87.0 — Cutaneous myiasis
- specified site NEC B87.89 — Myiasis of other sites
- traumatic B87.1 — Wound myiasis
- wound B87.1 — Wound myiasis
Common questions about myiasis ICD-10 codes
What is the ICD-10 code for myiasis?
- B87.9 — Myiasis, unspecified. More specific codes apply when the documentation supports them: B87.4, B87.0, B87.0, B87.0 and others below.
What is the ICD-10 code for aural myiasis?
- B87.4 — Aural myiasis.
What is the ICD-10 code for creeping myiasis?
- B87.0 — Cutaneous myiasis.
What is the ICD-10 code for cutaneous myiasis?
- B87.0 — Cutaneous myiasis.
What is the ICD-10 code for dermal myiasis?
- B87.0 — Cutaneous myiasis.
What is the ICD-10 code for ear myiasis?
- B87.4 — Aural myiasis.
What is the ICD-10 code for eye myiasis?
- B87.2 — Ocular myiasis.
Is B87.9 billable?
- Yes. B87.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B87.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B87.9 as a principal diagnosis.
Is B87.9 a CC or MCC?
- No. B87.9 is neither a CC nor an MCC under MS-DRG v44.0.