A79.82 Anaplasmosis [A. phagocytophilum]

The ICD-10-CM code for Anaplasmosis [A. phagocytophilum] is A79.82 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

1: Certain infectious and parasitic diseases (A00-B99)

Section

A75-A79: Rickettsioses (A75-A79)

Category A79

8 codes (6 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to A79.82:

• Anaplasmosis [A. phagocytophilum] (transfusion transmitted)

Inclusion Terms

• Transfusion transmitted A. phagocytophilum

U.S. Hospital Utilization

• An estimated 2,300 U.S. inpatient stays in 2023 included A79.82 among the documented diagnoses.
• 790 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

HIV Infections (TOC entry)

a. Human Immunodeficiency Virus (HIV) Infections .............................................................. 19

Infectious agents causing diseases in other chapters (TOC)

b. Infectious agents as the cause of diseases classified to other chapters ................................. 22

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)