ICD-10 Code for Relapsing Fever
The ICD-10-CM code for relapsing Fever is A68.9 — Relapsing fever, unspecified. This is the code the Alphabetic Index gives for relapsing Fever with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
A68.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which relapsing Fever code should you use?
The Alphabetic Index lists 3 codes under Relapsing fever. 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
| Carter's | A68.1 | Tick-borne relapsing fever |
| Dutton's | A68.1 | Tick-borne relapsing fever |
| Koch's | A68.9 | Relapsing fever, unspecified |
| louse-borne | A68.0 | Louse-borne relapsing fever |
| Novy's | A68.1 | Tick-borne relapsing fever |
| Obermeyer's | A68.0 | Louse-borne relapsing fever |
| Spirillum | A68.9 | Relapsing fever, unspecified |
| tick-borne | A68.1 | Tick-borne relapsing fever |
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