Is B58 a billable ICD-10-CM code?

No. B58 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does B58 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?

B58 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

B58

B58 — Toxoplasmosis

Non-billable headerICD-10-CM

B58 is a non-billable header ICD-10-CM code for toxoplasmosis. 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.

congenital toxoplasmosis (P37.1)

Includes

Conditions this code covers.

infection due to Toxoplasma gondii

Other codes that can never be billed with B58

These codes carry an Excludes1 note pointing at B58. 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 alone.

M63Disorders of muscle in diseases classified elsewhere
N16Renal tubulo-interstitial disorders in diseases classified elsewhere
G05Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere
H20.0Acute and subacute iridocyclitis
H32Chorioretinal disorders in diseases classified elsewhere
I41Myocarditis in diseases classified elsewhere
J17Pneumonia in diseases classified elsewhere
K77Liver disorders in diseases classified elsewhere

Risk adjustment

B58 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 B58

6 child codes. Green means billable.

Questions about B58

Is B58 a billable ICD-10-CM code?: No. B58 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does B58 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?: B58 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.