A91
A91 — Dengue hemorrhagic fever
Billable / specific codeICD-10-CM
A91 is a billable, specific ICD-10-CM code for dengue hemorrhagic fever. It is valid for submission on a claim.
Other codes that can never be billed with A91
These codes carry an Excludes1 note pointing at A91. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A91 alone.
Risk adjustment
A91 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.
How A91 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 A91.
- Bangkok hemorrhagic fever
- Singapore hemorrhagic fever
- Southeast Asian hemorrhagic fever
- Thailand hemorrhagic fever
- Dengue›hemorrhagic
- Fever›Bangkok hemorrhagic
- Fever›Philippine hemorrhagic
- Fever›Singapore hemorrhagic
- Fever›Southeast Asia hemorrhagic
- Fever›Thailand hemorrhagic
- Fever›dengue›hemorrhagic
- Fever›hemorrhagic NOS›Bangkok
Questions about A91
- Is A91 a billable ICD-10-CM code?
- Yes. A91 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does A91 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).