2027 ICD-10-CM Diagnosis Code A75Typhus fever

ICD-10-CM Codes›A00–B99›A75-A79›A75

ICD-10-CM A75
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

A75 is a non-billable ICD-10-CM category code for typhus fever, so it cannot be submitted on claims. Use a more specific code from this category instead, such as A75.0, A75.1, A75.2, and A75.3.

Code Identity

ICD-10-CM Code
A75
Billable Status
No — Non-Billable Category
Code Describes
Typhus fever
Short Description
Typhus fever
Same as the full description in the CMS dataset.
Chapter
A75-A79
Rickettsioses

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA75-A79Rickettsioses
CategoryA75Typhus fever
This CodeA75Typhus fever

Specific Coding for Typhus feverOverview

Non-specific codes like A75 require more characters. Use one of these billable codes instead:

  • Use A75.0 for Epidemic louse-borne typhus fever due to Rickettsia prowazekii

  • Use A75.1 for Recrudescent typhus [Brill's disease]

  • Use A75.2 for Typhus fever due to Rickettsia typhi

  • Use A75.3 for Typhus fever due to Rickettsia tsutsugamushi

  • Use A75.9 for Typhus fever, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to A75: its own notes plus those printed at Chapter 1. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • diseases generally recognized as communicable or transmissible

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • rickettsiosis due to Ehrlichia sennetsu (A79.81)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • 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

Add a second code, after this one, to fully describe the condition.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Patient EducationClinical

Bacterial Infections

Bacteria are tiny organisms (living things) that have only one cell. Under a microscope, they look like balls, rods, or spirals. They can be found almost everywhere on Earth. There are lots of bacteria in and on your body. In fact, your body has about 10 times more bacteria cells than human cells.

The full article covers:

  • What are bacteria?
  • How do bacterial infections spread?
  • What are the treatments for bacterial infections?
  • Can bacterial infections be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About A75Overview

What is the ICD-10 code for typhus fever?

A75 is the ICD-10-CM category for typhus fever, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is A75 (Typhus fever) a billable code?

No. This is a category header that groups the codes for typhus fever, and headers cannot be submitted on claims. Claims for typhus fever need a more specific code from this category, such as A75.0, A75.1, and A75.2.

Can A75 be reported with A79.81?

Not as a rule. The Excludes1 note on A75 lists "rickettsiosis due to Ehrlichia sennetsu (A79.81)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).