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B83.9

B83.9: Helminthiasis, unspecified

Billable / specific codeICD-10-CM

B83.9 is a billable, specific ICD-10-CM code for helminthiasis, unspecified. It is valid for submission on a claim.

Check B83.9 with the rest of the claim: free scrubber

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • intestinal helminthiasis NOS (B82.0)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Worms NOS

Excludes1 inherited from the categories above B83.9

A category’s note binds every code beneath it.

Written on B83: Other helminthiases

  • capillariasis NOS (B81.1)

Excludes2 inherited from the categories above B83.9

Not part of this code, but both may be coded when both are present.

Written on B83: Other helminthiases

  • intestinal capillariasis (B81.1)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

B83.9 is named in 2 Medicare coverage policies: 2 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56456Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy
  • A56632Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy

Alphabetic index entries that lead here

  • Colic›worm NOS
  • Fever›worm
  • Infection, infected, infective›helminths
  • Infection, infected, infective›worms
  • Infestation›helminth
  • Infestation›worms
  • Arthritis, arthritic›due to or associated with›helminthiasis
  • Arthritis, arthritic›in›helminthiasis NEC
  • Granuloma›peritoneum›due to ova of helminths NOS
  • Infestation›nematode NEC›conjunctiva NEC

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under B83

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.