Is B30 a billable ICD-10-CM code?

No. B30 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does B30 sit in the tabular list?

Certain infectious and parasitic diseases (A00-B99), in the block Other viral diseases (B25-B34).

What cannot be coded together with B30?

B30 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

B30

B30 — Viral conjunctivitis

Non-billable headerICD-10-CM

B30 is a non-billable header ICD-10-CM code for viral conjunctivitis. 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.

herpesviral [herpes simplex] ocular disease (B00.5)
ocular zoster (B02.3)

Other codes that can never be billed with B30

These codes carry an Excludes1 note pointing at B30. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading B30 alone.

H10.23Serous conjunctivitis, except viral

Risk adjustment

B30 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 B30

6 child codes. Green means billable.

Questions about B30

Is B30 a billable ICD-10-CM code?: No. B30 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does B30 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Other viral diseases (B25-B34).
What cannot be coded together with B30?: B30 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.