ICD-10-CM 2027 diagnosis code

B81Other intestinal helminthiases, not elsewhere classified

Not billable — use a more specific code

B81 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About B81

B81 is the ICD-10-CM diagnosis code for other intestinal helminthiases, not elsewhere classified. It belongs to block B65-B83 (helminthiases) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: B81.0 (Anisakiasis), B81.1 (capillariasis), B81.2 (Trichostrongyliasis), B81.3 (angiostrongyliasis), B81.4 (helminthiases) and B81.8 (helminthiases).

Don't report B81 together with the conditions in its Excludes1 note: Angiostrongylus cantonensis (B83.2) and Parastrongylus cantonensis (B83.2).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under B81

Coding notes

Excludes1Not coded here — never report together with this code

angiostrongyliasis due to:
Angiostrongylus cantonensis (B83.2)
Parastrongylus cantonensis (B83.2)

Notes that apply from higher levels

Instructions written at a parent level also apply to B81.

Broader instructions also apply from Chapter 1: Certain infectious and parasitic diseases.

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about B81

Is B81 billable?: No. B81 is a header code. Report one of its more specific subcodes instead.