A77 — Spotted fever [tick-borne rickettsioses]
Not billable
Is A77 billable?
No — A77 is a non-billable header code. A77 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 9 billable codes beneath A77.
Billable codes under this header
- A77.0Spotted fever due to Rickettsia rickettsii
- A77.1Spotted fever due to Rickettsia conorii
- A77.2Spotted fever due to Rickettsia siberica
- A77.3Spotted fever due to Rickettsia australis
- A77.8Other spotted fevers
- A77.9Spotted fever, unspecified
- A77.40Ehrlichiosis, unspecified
- A77.41Ehrlichiosis chaffeensis [E. chaffeensis]
- A77.49Other ehrlichiosis
A77 at a glance
| Code | A77 |
|---|---|
| Description | Spotted fever [tick-borne rickettsioses] |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Use additional code — inherited from Chapter 1
Report an additional code alongside A77 to fully describe the condition. A77 is sequenced first.
- code to identify resistance to antimicrobial drugs (Z16.-)
Excludes2 — not included here — inherited from Chapter 1
The conditions below are not part of A77, but a patient may have both at the same time. When documentation supports it, A77 and the excluded code may both be reported.
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
What codes fall under A77? (7)
How long has A77 existed?
A77 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.