ICD-10-CM 2027 diagnosis code

B74Filariasis

Not billable — use a more specific code

B74 is a header code, so it can't be reported by itself. Choose one of the 7 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 B74

B74 is the ICD-10-CM diagnosis code for filariasis. 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 7 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: B74.0 (due to Wuchereria bancrofti), B74.1 (due to Brugia malayi), B74.2 (due to Brugia timori), B74.3 (Loiasis), B74.4 (Mansonelliasis), B74.8 (filariases) and B74.9 (unspecified).

The conditions in its Excludes2 note aren't part of B74, but may be coded alongside it if the patient has both: onchocerciasis (B73) and tropical (pulmonary) eosinophilia NOS (J82.89).

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 B74

Coding notes

Excludes2Not included here — may be reported together if both conditions exist

onchocerciasis (B73)
tropical (pulmonary) eosinophilia NOS (J82.89)

Notes that apply from higher levels

Instructions written at a parent level also apply to B74.

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

Codes whose notes reference B74

I89Excludes1
R82.0Excludes1

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 B74

Is B74 billable?: No. B74 is a header code. Report one of its more specific subcodes instead.