Is B58.3 a billable ICD-10-CM code?

Yes. B58.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does B58.3 sit in the tabular list?

Certain infectious and parasitic diseases (A00-B99), in the block Protozoal diseases (B50-B64).

What cannot be coded together with B58.3?

B58.3 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 B58.3 (B58) and apply to it just the same.

B58.3

B58.3 — Pulmonary toxoplasmosis

Billable / specific codeICD-10-CM

B58.3 is a billable, specific ICD-10-CM code for pulmonary toxoplasmosis. It is valid for submission on a claim.

Excludes1 inherited from the categories above B58.3

These are not written on B58.3, but they bind it: a note on a category applies to every code beneath it. Billing B58.3 with anything listed here is a denial.

Written on B58 — Toxoplasmosis

congenital toxoplasmosis (P37.1)

Other codes that can never be billed with B58.3

These codes carry an Excludes1 note pointing at B58.3. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading B58.3 alone.

J17Pneumonia in diseases classified elsewhere

Risk adjustment

B58.3 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 6 Opportunistic Infections0.381 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

B58.3 is named in 3 Medicare coverage policies — 3 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56717Billing and Coding: Respiratory Therapy (Respiratory Care)
A57205Billing and Coding: Oximetry Services
A57224Billing and Coding: Respiratory Care

How B58.3 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 B58.3.

Pneumonia›in›toxoplasmosis
Pneumonitis›due to›toxoplasmosis(acquired)
Toxoplasma, toxoplasmosis›with›pneumonia, pneumonitis

Code history

B58.3 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 B58. If B58.3 is not quite right, the correct code is usually one of these.

Questions about B58.3

Is B58.3 a billable ICD-10-CM code?: Yes. B58.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does B58.3 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Protozoal diseases (B50-B64).
What cannot be coded together with B58.3?: B58.3 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 B58.3 (B58) and apply to it just the same.