A77.49

Billable
ChapterA00–B99
Ranksubcategory
Official Description

Other ehrlichiosis

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
  • Ehrlichiosis due to E. ewingii
  • Ehrlichiosis due to E. muris euclairensis
General instructions are available for the parent sections:
View CH1 NotesView A77.4 Notes

Clinical Hierarchy

CH1Certain infectious and parasitic diseases (A00-B99)
A75-A79Rickettsioses (A75-A79)
A77Spotted fever [tick-borne rickettsioses]
A77.4Ehrlichiosis
A77.49Other ehrlichiosis

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to A77.49:

subcategoryA77.4
Ehrlichiosis
View context instructions
chapterCH1
Certain infectious and parasitic diseases (A00-B99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to A77.49. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

5 raw paths
Anaplasmosis [A. phagocytophilum] (transfusion transmitted)1 unique routes
human→A77.49
Ehrlichiosis3 unique routes
due to(3 variants)
E. ewingii→A77.49
E. muris euclairensis→A77.49
specified organism NEC→A77.49
Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)1 unique routes
spotted
Ehrlichiosis
due to
specified organism NEC→A77.49

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

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