A77.3

Billable

ChapterA00–B99

Ranksubcategory

Official Description

Spotted fever due to Rickettsia australis

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Billable/specific code (valid for reimbursement).
•Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99).

Instructional Notes

Includes

Queensland tick typhus

General instructions are available for the parent sections:

View CH1 Notes

Clinical Hierarchy

CH1Certain infectious and parasitic diseases (A00-B99)

A75-A79Rickettsioses (A75-A79)

A77Spotted fever [tick-borne rickettsioses]

A77.3Spotted fever due to Rickettsia australis

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to A77.3:

chapterCH1

Certain infectious and parasitic diseases (A00-B99)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to A77.3. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

4 raw paths

Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)2 unique routes

Queensland (coastal) (tick)→A77.3

spotted

due to Rickettsia

australis→A77.3

Queensland fever1 unique routes

Direct index entry→A77.3

Typhus (fever)1 unique routes

Queensland tick→A77.3

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 867

Other Infectious and Parasitic Diseases Diagnoses with MCC

DRG 868

Other Infectious and Parasitic Diseases Diagnoses with CC

DRG 869

Other Infectious and Parasitic Diseases Diagnoses without CC/MCC

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Spotted fever due to Rickettsia australis.

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