All ICD10 Codes

A77

Non-Billable
ChapterA00–B99
Rankcategory
Official Description

Spotted fever [tick-borne rickettsioses]

Use a more specific code (6 billable, 1 non-billable)
A77.0Spotted fever due to Rickettsia rickettsiiA77.1Spotted fever due to Rickettsia conoriiA77.2Spotted fever due to Rickettsia sibericaA77.3Spotted fever due to Rickettsia australisA77.4Ehrlichiosishas subcodesA77.8Other spotted feversA77.9Spotted fever, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99).

CH1 Parent Instructions

Includes
  • diseases generally recognized as communicable or transmissible
Excludes1(Not coded here. Use a different code.)
  • certain localized infections - see body system-related chapters
Excludes2(Not included here. Code separately if applicable.)
  • carrier or suspected carrier of infectious disease (Z22.-)
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)
Use Additional Code
  • code to identify resistance to antimicrobial drugs (Z16.-)

Clinical Hierarchy

BillableHas subcodes
CH1Certain infectious and parasitic diseases (A00-B99)
A75-A79Rickettsioses (A75-A79)
A77Spotted fever [tick-borne rickettsioses]Not billable
A77.0Spotted fever due to Rickettsia rickettsiiBillable
A77.1Spotted fever due to Rickettsia conoriiBillable
A77.2Spotted fever due to Rickettsia sibericaBillable
A77.3Spotted fever due to Rickettsia australisBillable
A77.4EhrlichiosisSubcodes
A77.8Other spotted feversBillable
A77.9Spotted fever, unspecifiedBillable

Applicable Ancestor Context

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

chapterCH1
Certain infectious and parasitic diseases (A00-B99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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