A77
⚠ Non-billable
Spotted fever [tick-borne rickettsioses]
ICD-10-CM · FY2026 · Certain Infectious and Parasitic Diseases
Code
A77
System
ICD-10-CM
Billable
No — use specific code
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?
ICD-10-CM code A77 represents Spotted fever [tick-borne rickettsioses]. It is a non-billable header code requiring a more specific subcategory in the Certain Infectious and Parasitic Diseases chapter, effective October 1, 2025 – September 30, 2026.
Is A77 billable?
No. A77 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is A77 in?
A77 belongs to the Certain Infectious and Parasitic Diseases chapter (A00–B99) of ICD-10-CM.
Related codes in the A77 category
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
A77.40
Ehrlichiosis, unspecified
Billable
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