ICD-10 · PDGM grouping
A90-A99 — Arthropod-borne viral fevers and viral hemorrhagic fevers
Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.2.26.
Codes in range
34
No clinical group
0
A period cannot be grouped from these.
Barred as primary
0
CMS rejects these in the primary position.
Where these codes group
32 of the 34 codes in A90-A99 group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases, but the range is not uniform — it spreads across 2 clinical groups. Every code here is assigned a group.
Code families in A90-A99
One page per three-character family: every code in it, whether it can lead a claim, its clinical group and comorbidity subgroup.
- A90Dengue fever [classical dengue]1 code
- A91Dengue hemorrhagic fever1 code
- A92Other mosquito-borne viral fevers11 codes
- A93Other arthropod-borne viral fevers, not elsewhere classified4 codes
- A94Unspecified arthropod-borne viral fever1 code
- A95Yellow fever3 codes
- A96Arenaviral hemorrhagic fever5 codes
- A98Other viral hemorrhagic fevers, not elsewhere classified7 codes
- A99Unspecified viral hemorrhagic fever1 code
Every code in A90-A99
Descriptions are CMS’s own, abbreviated as CMS abbreviates them.
| Code | Description | Clinical group | Primary position |
|---|---|---|---|
| A90 | Dengue fever [classical dengue] | K | Can lead a claim |
| A91 | Dengue hemorrhagic fever | K | Can lead a claim |
| A920 | Chikungunya virus disease | K | Can lead a claim |
| A921 | O'nyong-nyong fever | K | Can lead a claim |
| A922 | Venezuelan equine fever | K | Can lead a claim |
| A9230 | West Nile virus infection, unspecified | K | Can lead a claim |
| A9231 | West Nile virus infection with encephalitis | B | Can lead a claim |
| A9232 | West Nile virus infection with oth neurologic manifestation | B | Can lead a claim |
| A9239 | West Nile virus infection with other complications | K | Can lead a claim |
| A924 | Rift Valley fever | K | Can lead a claim |
| A925 | Zika virus disease | K | Can lead a claim |
| A928 | Other specified mosquito-borne viral fevers | K | Can lead a claim |
| A929 | Mosquito-borne viral fever, unspecified | K | Can lead a claim |
| A930 | Oropouche virus disease | K | Can lead a claim |
| A931 | Sandfly fever | K | Can lead a claim |
| A932 | Colorado tick fever | K | Can lead a claim |
| A938 | Other specified arthropod-borne viral fevers | K | Can lead a claim |
| A94 | Unspecified arthropod-borne viral fever | K | Can lead a claim |
| A950 | Sylvatic yellow fever | K | Can lead a claim |
| A951 | Urban yellow fever | K | Can lead a claim |
| A959 | Yellow fever, unspecified | K | Can lead a claim |
| A960 | Junin hemorrhagic fever | K | Can lead a claim |
| A961 | Machupo hemorrhagic fever | K | Can lead a claim |
| A962 | Lassa fever | K | Can lead a claim |
| A968 | Other arenaviral hemorrhagic fevers | K | Can lead a claim |
| A969 | Arenaviral hemorrhagic fever, unspecified | K | Can lead a claim |
| A980 | Crimean-Congo hemorrhagic fever | K | Can lead a claim |
| A981 | Omsk hemorrhagic fever | K | Can lead a claim |
| A982 | Kyasanur Forest disease | K | Can lead a claim |
| A983 | Marburg virus disease | K | Can lead a claim |
| A984 | Ebola virus disease | K | Can lead a claim |
| A985 | Hemorrhagic fever with renal syndrome | K | Can lead a claim |
| A988 | Other specified viral hemorrhagic fevers | K | Can lead a claim |
| A99 | Unspecified viral hemorrhagic fever | K | Can lead a claim |
Source: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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