ICD-10-CM 2027 diagnosis code

A01.0Typhoid fever

Not billable — use a more specific code

A01.0 is a header code, so it can't be reported by itself. Choose one of the 7 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About A01.0

A01.0 is the ICD-10-CM diagnosis code for typhoid fever. It belongs to category A01 (typhoid and paratyphoid fevers), block A00-A09 (intestinal infectious diseases) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 7 subcodes must be used instead.

Within A01 (typhoid and paratyphoid fevers), A01.0 is specifically for typhoid fever. Related codes cover paratyphoid fever A (A01.1), paratyphoid fever B (A01.2), paratyphoid fever C (A01.3) and paratyphoid fever, unspecified (A01.4).

To report this condition, pick the subcode that matches the documentation: A01.00 (unspecified), A01.01 (meningitis), A01.02 (with heart involvement), A01.03 (pneumonia), A01.04 (arthritis), A01.05 (osteomyelitis) and A01.09 (with other complications).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under A01.0

Coding notes

Applicable toConditions and synonyms classified to this code

Infection due to Salmonella typhi

Notes that apply from higher levels

Instructions written at a parent level also apply to A01.0.

Broader instructions also apply from Chapter 1: Certain infectious and parasitic diseases.

Code history

2016
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2021
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2023
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2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about A01.0

Is A01.0 billable?: No. A01.0 is a header code. Report one of its more specific subcodes instead.