Is B81 a billable ICD-10-CM code?

No. B81 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does B81 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?

B81 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

B81

B81 — Other intestinal helminthiases, not elsewhere classified

Non-billable headerICD-10-CM

B81 is a non-billable header ICD-10-CM code for other intestinal helminthiases, not elsewhere classified. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

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

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

Other codes that can never be billed with B81

These codes carry an Excludes1 note pointing at B81. 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 alone.

B78Strongyloidiasis
B83Other helminthiases

Risk adjustment

B81 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.

Code to one of these instead B81

6 child codes. Green means billable.

Questions about B81

Is B81 a billable ICD-10-CM code?: No. B81 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does B81 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?: B81 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.