ICD-10-CM 2027 diagnosis code

B78Strongyloidiasis

Not billable — use a more specific code

B78 is a header code, so it can't be reported by itself. Choose one of the 4 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 B78

B78 is the ICD-10-CM diagnosis code for strongyloidiasis. 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 4 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: B78.0 (strongyloidiasis), B78.1 (strongyloidiasis), B78.7 (strongyloidiasis) and B78.9 (unspecified).

Don't report B78 together with the conditions in its Excludes1 note: trichostrongyliasis (B81.2).

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 B78

Coding notes

Excludes1Not coded here — never report together with this code

trichostrongyliasis (B81.2)

Notes that apply from higher levels

Instructions written at a parent level also apply to B78.

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

Code history

2016
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2021
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2023
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2025
2026
2027

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

Common questions about B78

Is B78 billable?: No. B78 is a header code. Report one of its more specific subcodes instead.