A77

⚠ Non-billable (Header)

Spotted fever [tick-borne rickettsioses]

Certain infectious and parasitic diseases (A00-B99)

⚠️ This is a category header code — not billable. Use a more specific child code below.

✓ No additional coding notes for A77

Child Codes (7)

A77.0Spotted fever due to Rickettsia rickettsii✓ Billable A77.1Spotted fever due to Rickettsia conorii✓ Billable A77.2Spotted fever due to Rickettsia siberica✓ Billable A77.3Spotted fever due to Rickettsia australis✓ Billable A77.4EhrlichiosisHeader A77.8Other spotted fevers✓ Billable A77.9Spotted fever, unspecified✓ Billable

Clinical Description

ICD-10-CM code A77 represents spotted fever [tick-borne rickettsioses]. This code falls under the Certain infectious and parasitic diseases (A00-B99) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.

Frequently Asked Questions

What is ICD-10 code A77?

ICD-10-CM code A77 is "Spotted fever [tick-borne rickettsioses]". It belongs to the category: Certain infectious and parasitic diseases (A00-B99).

Is A77 a billable ICD-10 code?

No, A77 is a non-billable header code. A more specific child code must be used for billing.

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Code Information

CodeA77

BillableNo — Header code

CategoryCertain infectious and parasitic diseases (A00-B99)

Excludes10 rule(s)

Excludes20 note(s)

Child codes7

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)