A79 – Other rickettsioses
ICD-10-CM 2027 diagnosis code · Rickettsioses
ICD-10-CM code
A79
- Code
A79(claims format:A79)- Description
- Other rickettsioses
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 1. Certain infectious and parasitic diseases (A00-B99)
- Block
- A75-A79 Rickettsioses
Billable codes under A79
A79 is a header code and cannot be used on claims. Choose the most specific code:
- A79.0 – Trench feverBillable
- A79.1 – Rickettsialpox due to Rickettsia akariBillable
- A79.8 – Other specified rickettsiosesHeader (more codes below)
- A79.9 – Rickettsiosis, unspecifiedBillable
Frequently asked questions
What is ICD-10 code A79?
A79 is the ICD-10-CM code for other rickettsioses, in the block A75-A79 (Rickettsioses).
Is A79 a billable code?
No. A79 is a header code with more specific child codes; report one of the billable codes listed above.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.