ICD-10-CM 2027
ICD-10 code for Anisakiasis
From the official ICD-10-CM alphabetic index entry “Anisakiasis (infection) (infestation)”. Page updated September 29, 2026.
About coding Anisakiasis
The ICD-10-CM code for Anisakiasis is B81.0 (Anisakiasis).
Within B81 (other intestinal helminthiases, not elsewhere classified), B81.0 is specifically for Anisakiasis. Related codes cover intestinal capillariasis (B81.1), Trichostrongyliasis (B81.2), intestinal angiostrongyliasis (B81.3), mixed intestinal helminthiases (B81.4) and other specified intestinal helminthiases (B81.8).
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 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC, relative weight 1.2392) and DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC, relative weight 0.7645), in MDC 06 (Diseases and Disorders of the Digestive System), 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 Anisakiasis ICD-10 codes
What is the ICD-10 code for Anisakiasis?
- B81.0 — Anisakiasis.
Is B81.0 billable?
- Yes. B81.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B81.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B81.0 as a principal diagnosis.
Is B81.0 a CC or MCC?
- B81.0 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.