A77.8 Other spotted fevers
The ICD-10-CM code for Other spotted fevers is A77.8 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- A75-A79: Rickettsioses (A75-A79)
- Category A77
- 11 codes (9 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to A77.8:
- Rickettsia 364D/R. philipii (Pacific Coast tick fever)
- Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › pacific coast tick
- Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › African tick bite
- Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › spotted › due to Rickettsia › parkeri
- Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › spotted › due to Rickettsia › specified type NEC
- Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › spotted › due to Rickettsia › africae (African tick bite fever)
Inclusion Terms
- Rickettsia 364D/R. philipii (Pacific Coast tick fever)
- Spotted fever due to Rickettsia africae (African tick bite fever)
- Spotted fever due to Rickettsia parkeri
U.S. Hospital Utilization
A77.8 appeared in too few sampled U.S. inpatient stays in 2023 to report a national estimate (AHRQ suppresses counts of 10 or fewer) — a rare inpatient diagnosis.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
HIV Infections (TOC entry)a. Human Immunodeficiency Virus (HIV) Infections .............................................................. 19
Infectious agents causing diseases in other chapters (TOC)b. Infectious agents as the cause of diseases classified to other chapters ................................. 22
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026