ICD-10 · PDGM grouping
A75-A79 — Rickettsioses
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
21
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
21 of the 21 codes in A75-A79 group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases. Every code here is assigned a group.
Code families in A75-A79
One page per three-character family: every code in it, whether it can lead a claim, its clinical group and comorbidity subgroup.
Every code in A75-A79
Descriptions are CMS’s own, abbreviated as CMS abbreviates them.
| Code | Description | Clinical group | Primary position |
|---|---|---|---|
| A750 | Epidemic louse-borne typhus fever d/t Rickettsia prowazekii | K | Can lead a claim |
| A751 | Recrudescent typhus [Brill's disease] | K | Can lead a claim |
| A752 | Typhus fever due to Rickettsia typhi | K | Can lead a claim |
| A753 | Typhus fever due to Rickettsia tsutsugamushi | K | Can lead a claim |
| A759 | Typhus fever, unspecified | K | Can lead a claim |
| A770 | Spotted fever due to Rickettsia rickettsii | K | Can lead a claim |
| A771 | Spotted fever due to Rickettsia conorii | K | Can lead a claim |
| A772 | Spotted fever due to Rickettsia siberica | K | Can lead a claim |
| A773 | Spotted fever due to Rickettsia australis | K | Can lead a claim |
| A7740 | Ehrlichiosis, unspecified | K | Can lead a claim |
| A7741 | Ehrlichiosis chaffeensis [E. chaffeensis] | K | Can lead a claim |
| A7749 | Other ehrlichiosis | K | Can lead a claim |
| A778 | Other spotted fevers | K | Can lead a claim |
| A779 | Spotted fever, unspecified | K | Can lead a claim |
| A78 | Q fever | K | Can lead a claim |
| A790 | Trench fever | K | Can lead a claim |
| A791 | Rickettsialpox due to Rickettsia akari | K | Can lead a claim |
| A7981 | Rickettsiosis due to Ehrlichia sennetsu | K | Can lead a claim |
| A7982 | Anaplasmosis [A. phagocytophilum] | K | Can lead a claim |
| A7989 | Other specified rickettsioses | K | Can lead a claim |
| A799 | Rickettsiosis, unspecified | 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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