A77 – Spotted fever [tick-borne rickettsioses]
ICD-10-CM 2027 diagnosis code · Rickettsioses
ICD-10-CM code
A77
- Code
A77(claims format:A77)- Description
- Spotted fever [tick-borne 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 A77
A77 is a header code and cannot be used on claims. Choose the most specific code:
- A77.0 – Spotted fever due to Rickettsia rickettsiiBillable
- A77.1 – Spotted fever due to Rickettsia conoriiBillable
- A77.2 – Spotted fever due to Rickettsia sibericaBillable
- A77.3 – Spotted fever due to Rickettsia australisBillable
- A77.4 – EhrlichiosisHeader (more codes below)
- A77.8 – Other spotted feversBillable
- A77.9 – Spotted fever, unspecifiedBillable
Frequently asked questions
What is ICD-10 code A77?
A77 is the ICD-10-CM code for spotted fever [tick-borne rickettsioses], in the block A75-A79 (Rickettsioses).
Is A77 a billable code?
No. A77 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.