Is B83.1 a billable ICD-10-CM code?

Yes. B83.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does B83.1 sit in the tabular list?

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

What cannot be coded together with B83.1?

B83.1 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 B83.1 (B83) and apply to it just the same.

B83.1

B83.1 — Gnathostomiasis

Billable / specific codeICD-10-CM

B83.1 is a billable, specific ICD-10-CM code for gnathostomiasis. It is valid for submission on a claim.

Inclusion terms

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

Wandering swelling

Excludes1 inherited from the categories above B83.1

These are not written on B83.1, but they bind it: a note on a category applies to every code beneath it. Billing B83.1 with anything listed here is a denial.

Written on B83 — Other helminthiases

capillariasis NOS (B81.1)

Excludes2 inherited from the categories above B83.1

Also inherited, and the opposite of Excludes1: these conditions are not part of B83.1, but a patient can have both, so you may code both.

Written on B83 — Other helminthiases

intestinal capillariasis (B81.1)

Risk adjustment

B83.1 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 B83.1 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 B83.1.

Gnathostoma spinigerum(infection) (infestation), gnathostomiasis (wandering swelling)
Infection, infected, infective›Gnathostoma(spinigerum)
Infestation›Gnathostoma(spinigerum)
Swelling›wandering, due to Gnathostoma(spinigerum)
Infestation›helminth›gnathostomiasis
Infestation›nematode NEC›Gnathostoma spinigerum

Code history

B83.1 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 B83. If B83.1 is not quite right, the correct code is usually one of these.

Questions about B83.1

Is B83.1 a billable ICD-10-CM code?: Yes. B83.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does B83.1 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Helminthiases (B65-B83).
What cannot be coded together with B83.1?: B83.1 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 B83.1 (B83) and apply to it just the same.