Is B81.2 a billable ICD-10-CM code?

Yes. B81.2 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does B81.2 sit in the tabular list?

Certain infectious and parasitic diseases (A00-B99), in the block Helminthiases (B65-B83).

What cannot be coded together with B81.2?

B81.2 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above B81.2 (B81) and apply to it just the same.

B81.2

B81.2 — Trichostrongyliasis

Billable / specific codeICD-10-CM

B81.2 is a billable, specific ICD-10-CM code for trichostrongyliasis. It is valid for submission on a claim.

Excludes1 inherited from the categories above B81.2

These are not written on B81.2, but they bind it: a note on a category applies to every code beneath it. Billing B81.2 with anything listed here is a denial.

Written on B81 — Other intestinal helminthiases, not elsewhere classified

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

Other codes that can never be billed with B81.2

These codes carry an Excludes1 note pointing at B81.2. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading B81.2 alone.

B78Strongyloidiasis

Risk adjustment

B81.2 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

How B81.2 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to B81.2.

Trichostrongyliasis, trichostrongylosis(small intestine)
Trichostrongylus infection
Infection, infected, infective›Trichostrongylus
Infestation›Trichostrongylus
Infestation›nematode NEC›trichostrongylus
Infestation›helminth›intestinal›trichostrongyliasis

Code history

B81.2 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share B81. If B81.2 is not quite right, the correct code is usually one of these.

Questions about B81.2

Is B81.2 a billable ICD-10-CM code?: Yes. B81.2 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does B81.2 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Helminthiases (B65-B83).
What cannot be coded together with B81.2?: B81.2 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above B81.2 (B81) and apply to it just the same.