Other intestinal helminthiases, not elsewhere classified (B81) ICD-10-CM
The B81 code range covers other intestinal helminthiases, not elsewhere classified with 7 ICD-10-CM diagnosis codes. 6 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the B81 Range 7 codes · 6 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the B81 range.
Anisakiasis
Infection with roundworms of the genus ANISAKIS. Human infection results from the consumption of fish harboring roundworm larvae. The worms may cause acute NAUSEA; VOMITING; or penetrate into the wall of the DIGESTIVE TRACT where they give rise to EOSINOPHILIC GRANULOMA in the STOMACH; INTESTINES; or the OMENTUM.
About the B81 Code Range
ICD-10 code section B81 covers various intestinal helminth infections that are not classified elsewhere, identifying specific parasitic worm diseases of the intestines beyond the common types. These codes help pinpoint diagnoses like anisakiasis and other rare worm infections.
This section includes codes such as B81.0 for Anisakiasis, a parasitic infection caused by larvae of the Anisakis family, which might also be called infections by Pseudoterranova or other Anisakidae larvae. B81.1intestinal capillariasis, linked to Capillaria species infections. The B81.2 code captures trichostrongyliasis, caused by several Trichostrongylus parasites. B81.3 stands for intestinal angiostrongyliasis, a condition caused by Angiostrongylus larvae. Mixed infections from different helminths fall under B81.4, while B81.8 records other specific intestinal helminthiasis infections with various parasites. Recognizing these specific ICD-10 codes is essential for accurate diagnosis and treatment documentation of these less common but distinct parasitic intestinal diseases.
Questions About This Page
How many billable codes are in the B81 range?
Of the 7 codes in this range, 6 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the B81 range classify?
The range classifies other intestinal helminthiases, not elsewhere classified. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
