ICD-10-CM 2027
ICD-10 code for Helminths infection
From the official ICD-10-CM alphabetic index entry “Infection, infected, infective (opportunistic) › helminths”. Page updated September 29, 2026.
About coding Helminths infection
The ICD-10-CM code for Helminths infection is B83.9 (Helminthiasis, unspecified). The official index lists 4 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on B83.9.
Within B83, choose B83.9 (Helminthiasis, unspecified) only when documentation doesn't support a more specific option: visceral larva migrans (B83.0), Gnathostomiasis (B83.1), angiostrongyliasis due to Parastrongylus cantonensis (B83.2), Syngamiasis (B83.3), internal hirudiniasis (B83.4) and other specified helminthiases (B83.8).
Don't report B83.9 together with the conditions in its Excludes1 note: intestinal helminthiasis NOS (B82.0).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific Helminths infection codes (official index)
Don't confuse with (Excludes1 for B83.9)
- intestinal helminthiasis NOS (B82.0)
Common questions about Helminths infection ICD-10 codes
What is the ICD-10 code for Helminths infection?
- B83.9 — Helminthiasis, unspecified. More specific codes apply when the documentation supports them: B82.0, B81.4, B81.8, B83.8.
What is the ICD-10 code for intestinal helminths infection?
- B82.0 — Intestinal helminthiasis, unspecified.
Is B83.9 billable?
- Yes. B83.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B83.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B83.9 as a principal diagnosis.
Is B83.9 a CC or MCC?
- No. B83.9 is neither a CC nor an MCC under MS-DRG v44.0.