Is B40.0 a billable ICD-10-CM code?

Yes. B40.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does B40.0 sit in the tabular list?

Certain infectious and parasitic diseases (A00-B99), in the block Mycoses (B35-B49).

What cannot be coded together with B40.0?

B40.0 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 B40.0 (B40) and apply to it just the same.

B40.0

B40.0 — Acute pulmonary blastomycosis

Billable / specific codeICD-10-CM

B40.0 is a billable, specific ICD-10-CM code for acute pulmonary blastomycosis. It is valid for submission on a claim.

Excludes1 inherited from the categories above B40.0

These are not written on B40.0, but they bind it: a note on a category applies to every code beneath it. Billing B40.0 with anything listed here is a denial.

Written on B40 — Blastomycosis

Brazilian blastomycosis (B41.-)
keloidal blastomycosis (B48.0)

Other codes that can never be billed with B40.0

These codes carry an Excludes1 note pointing at B40.0. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading B40.0 alone.

J99Respiratory disorders in diseases classified elsewhere

Risk adjustment

B40.0 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.

Medicare coverage

B40.0 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A57224Billing and Coding: Respiratory Care

How B40.0 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 B40.0.

Blastomycosis, blastomycotic›primary pulmonary
Blastomycosis, blastomycotic›pulmonary›acute

Code history

B40.0 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 B40. If B40.0 is not quite right, the correct code is usually one of these.

Questions about B40.0

Is B40.0 a billable ICD-10-CM code?: Yes. B40.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does B40.0 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Mycoses (B35-B49).
What cannot be coded together with B40.0?: B40.0 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 B40.0 (B40) and apply to it just the same.