Is A98 a billable ICD-10-CM code?

No. A98 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does A98 sit in the tabular list?

Certain infectious and parasitic diseases (A00-B99), in the block Arthropod-borne viral fevers and viral hemorrhagic fevers (A90-A99).

What cannot be coded together with A98?

A98 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

A98

A98 — Other viral hemorrhagic fevers, not elsewhere classified

Non-billable headerICD-10-CM

A98 is a non-billable header ICD-10-CM code for other viral hemorrhagic fevers, not elsewhere classified. 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.

chikungunya hemorrhagic fever (A92.0)
dengue hemorrhagic fever (A91)

Other codes that can never be billed with A98

These codes carry an Excludes1 note pointing at A98. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A98 alone.

B33.4Hantavirus (cardio)-pulmonary syndrome [HPS] [HCPS]

Risk adjustment

A98 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 A98

7 child codes. Green means billable.

Questions about A98

Is A98 a billable ICD-10-CM code?: No. A98 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does A98 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Arthropod-borne viral fevers and viral hemorrhagic fevers (A90-A99).
What cannot be coded together with A98?: A98 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.