A01.4 Paratyphoid fever, unspecified
The ICD-10-CM code for Paratyphoid fever, unspecified is A01.4 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- A00-A09: Intestinal infectious diseases (A00-A09)
- Category A01
- 13 codes (11 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to A01.4:
- Schottmuller's disease
- Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › paratyphoid
- Cholecystitis › paratyphoidal, current
- Infection, infected, infective (opportunistic) › Bacillus › paratyphoid, paratyphosus
- Infection, infected, infective (opportunistic) › Bacterium › paratyphosum
- Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) › in (due to) › paratyphoid fever
- Infection, infected, infective (opportunistic) › Parastrongylus › paratyphoid
- Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) › due to or associated with › paratyphoid fever (see also category M01)
Inclusion Terms
- Infection due to Salmonella paratyphi NOS
U.S. Hospital Utilization
A01.4 appeared in too few sampled U.S. inpatient stays in 2023 to report a national estimate (AHRQ suppresses counts of 10 or fewer) — a rare inpatient diagnosis.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
HIV Infections (TOC entry)a. Human Immunodeficiency Virus (HIV) Infections .............................................................. 19
Infectious agents causing diseases in other chapters (TOC)b. Infectious agents as the cause of diseases classified to other chapters ................................. 22
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026