ICD-10 Code for Rickettsial Disease
The ICD-10-CM code for rickettsial Disease is A79.9 — Rickettsiosis, unspecified. This is the code the Alphabetic Index gives for rickettsial Disease with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
A79.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which rickettsial Disease code should you use?
The Alphabetic Index lists 2 codes under Rickettsial disease. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| specified type NEC | A79.89 | Other specified rickettsioses |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources