Is B00 a billable ICD-10-CM code?

No. B00 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does B00 sit in the tabular list?

Certain infectious and parasitic diseases (A00-B99), in the block Viral infections characterized by skin and mucous membrane lesions (B00-B09).

What cannot be coded together with B00?

B00 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

B00

B00 — Herpesviral [herpes simplex] infections

Non-billable headerICD-10-CM

B00 is a non-billable header ICD-10-CM code for herpesviral [herpes simplex] infections. 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 herpesviral infections (P35.2)

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

anogenital herpesviral infection (A60.-)
gammaherpesviral mononucleosis (B27.0-)
herpangina (B08.5)

Other codes that can never be billed with B00

These codes carry an Excludes1 note pointing at B00. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading B00 alone.

L03.01Cellulitis of finger
B30Viral conjunctivitis
B34Viral infection of unspecified site
A85Other viral encephalitis, not elsewhere classified
A87Viral meningitis
G02Meningitis in other infectious and parasitic diseases classified elsewhere
G05Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere
H20.0Acute and subacute iridocyclitis

Risk adjustment

B00 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 B00

9 child codes. Green means billable.

Questions about B00

Is B00 a billable ICD-10-CM code?: No. B00 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does B00 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Viral infections characterized by skin and mucous membrane lesions (B00-B09).
What cannot be coded together with B00?: B00 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.