A77.40
✓ Billable
Ehrlichiosis, unspecified
ICD-10-CM · FY2026 · Certain Infectious and Parasitic Diseases
Code
A77.40
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Certain Infectious and Parasitic Diseases
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code A77.40?
ICD-10-CM code A77.40 represents Ehrlichiosis, unspecified. It is a billable diagnosis code in the Certain Infectious and Parasitic Diseases chapter, effective October 1, 2025 – September 30, 2026.
Is A77.40 billable?
Yes. A77.40 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is A77.40 in?
A77.40 belongs to the Certain Infectious and Parasitic Diseases chapter (A00–B99) of ICD-10-CM.
Related codes in the A77 category
A77
Spotted fever [tick-borne rickettsioses]
Non-billable
A77.0
Spotted fever due to Rickettsia rickettsii
Billable
A77.1
Spotted fever due to Rickettsia conorii
Billable
A77.2
Spotted fever due to Rickettsia siberica
Billable
A77.3
Spotted fever due to Rickettsia australis
Billable
A77.4
Ehrlichiosis
Non-billable
A77.8
Other spotted fevers
Billable
A77.9
Spotted fever, unspecified
Billable
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