A77.1

Spotted fever due to Rickettsia conorii

Billable FY2026 2025-10-01 → 2026-09-30

Exclusions 5 never code together

A00-B99chapter

Excludes1

certain localized infections - see body system-related chapters

Excludes2

carrier or suspected carrier of infectious disease (Z22.-)Z22.-
infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)O98.-
infectious and parasitic diseases specific to the perinatal period (P35-P39)P35-P39
influenza and other acute respiratory infections (J00-J22)J00-J22

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 8

A77.1code

Inclusion terms

African tick typhus
Boutonneuse fever
India tick typhus
Kenya tick typhus
Marseilles fever
Mediterranean tick fever

A00-B99chapter

Includes

diseases generally recognized as communicable or transmissible

Use additional code

code to identify resistance to antimicrobial drugs (Z16.-)Z16.-

Index entries leading here 7

Infection, infected, infective (opportunistic) B99.9
- typhus A75.9
  - tick-borne A77.9
    - African A77.1
Typhus (fever) A75.9
- African tick A77.1
- India tick A77.1
- Kenya (tick) A77.1
Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) R50.9
- boutonneuse A77.1
- spotted A77.9
  - due to Rickettsia
    - conorii A77.1
- tick
  - Mediterranean A77.1
- Marseilles A77.1
- Kenya (tick) A77.1
- Mediterranean A23.9
  - tick A77.1
Disease, diseased — see also Syndrome
- Conor and Bruch's (boutonneuse fever) A77.1
Mediterranean
- fever — see Brucellosis
  - tick A77.1
- tick fever A77.1
Kenya fever A77.1
Marseilles fever A77.1

Alongside this code 6 same parent — A77

A77.0 Spotted fever due to Rickettsia rickettsii A77.2 Spotted fever due to Rickettsia siberica A77.3 Spotted fever due to Rickettsia australis A77.4 Ehrlichiosis category A77.8 Other spotted fevers A77.9 Spotted fever, unspecified

Medications 2

10 Spotted Fever Group Rickettsiosis drugs 10 Rocky Mountain Spotted Fever drugs

MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable: yes
Code set: FY2026
Parent: A77
Block: A75-A79
Siblings: 6

Present FY2024–FY2027.