ICD-10-CM 2027
ICD-10 code for Swimmer's itch
From the official ICD-10-CM alphabetic index entry “Itch, itching › swimmer's”. Page updated September 29, 2026.
About coding Swimmer's itch
The ICD-10-CM code for Swimmer's itch is B65.3 (Cercarial dermatitis).
Within B65 (schistosomiasis [bilharziasis]), B65.3 is specifically for Cercarial dermatitis. Related codes cover schistosomiasis due to Schistosoma haematobium [urinary schistosomiasis] (B65.0), schistosomiasis due to Schistosoma mansoni [intestinal schistosomiasis] (B65.1), schistosomiasis due to Schistosoma japonicum (B65.2), other schistosomiasis (B65.8) and schistosomiasis, unspecified (B65.9).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
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.
Common questions about Swimmer's itch ICD-10 codes
What is the ICD-10 code for Swimmer's itch?
- B65.3 — Cercarial dermatitis.
Is B65.3 billable?
- Yes. B65.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B65.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B65.3 as a principal diagnosis.
Is B65.3 a CC or MCC?
- B65.3 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.