ICD-10-CM 2027
ICD-10 code for sporotrichosis
From the official ICD-10-CM alphabetic index entry “Sporotrichosis”. Page updated September 29, 2026.
About coding sporotrichosis
The ICD-10-CM code for sporotrichosis is B42.9 (Sporotrichosis, unspecified). The official index lists 6 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on B42.9.
Within B42, choose B42.9 (unspecified) only when documentation doesn't support a more specific option: pulmonary sporotrichosis (B42.0), Lymphocutaneous sporotrichosis (B42.1), disseminated sporotrichosis (B42.7) and other forms of sporotrichosis (B42.8).
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 867 (Other Infectious and Parasitic Diseases Diagnoses with MCC, relative weight 2.1859), DRG 868 (Other Infectious and Parasitic Diseases Diagnoses with CC, relative weight 1.0235) and DRG 869 (Other Infectious and Parasitic Diseases Diagnoses without CC/MCC, relative weight 0.6787), in MDC 18 (Infectious and Parasitic Diseases, Systemic or Unspecified Sites), 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 sporotrichosis codes (official index)
- arthritis B42.82 — Sporotrichosis arthritis
- disseminated B42.7 — Disseminated sporotrichosis
- generalized B42.7 — Disseminated sporotrichosis
- lymphocutaneous (fixed) (progressive) B42.1 — Lymphocutaneous sporotrichosis
- pulmonary B42.0 — Pulmonary sporotrichosis
- specified NEC B42.89 — Other forms of sporotrichosis
Common questions about sporotrichosis ICD-10 codes
What is the ICD-10 code for sporotrichosis?
- B42.9 — Sporotrichosis, unspecified. More specific codes apply when the documentation supports them: B42.82, B42.7, B42.7, B42.1 and others below.
What is the ICD-10 code for arthritis sporotrichosis?
- B42.82 — Sporotrichosis arthritis.
What is the ICD-10 code for disseminated sporotrichosis?
- B42.7 — Disseminated sporotrichosis.
What is the ICD-10 code for generalized sporotrichosis?
- B42.7 — Disseminated sporotrichosis.
What is the ICD-10 code for lymphocutaneous sporotrichosis?
- B42.1 — Lymphocutaneous sporotrichosis.
What is the ICD-10 code for pulmonary sporotrichosis?
- B42.0 — Pulmonary sporotrichosis.
Is B42.9 billable?
- Yes. B42.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B42.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B42.9 as a principal diagnosis.
Is B42.9 a CC or MCC?
- No. B42.9 is neither a CC nor an MCC under MS-DRG v44.0.