ICD-10-CM 2027
ICD-10 code for salmonella infection
From the official ICD-10-CM alphabetic index entry “Infection, infected, infective (opportunistic) › Salmonella (aertrycke) (arizonae) (cholerae-suis) (enteritidis) (gallinarum) (suipestifer) (typhimurium)”. Page updated September 29, 2026.
About coding salmonella infection
The ICD-10-CM code for salmonella infection is A02.9 (Salmonella infection, unspecified). The official index lists 17 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on A02.9.
Within A02, choose A02.9 (Salmonella infection, unspecified) only when documentation doesn't support a more specific option: salmonella enteritis (A02.0), salmonella sepsis (A02.1), localized salmonella infections (A02.2) and other specified salmonella infections (A02.8).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 867 (Other Infectious and Parasitic Diseases Diagnoses with MCC, relative weight 2.1859), DRG 868 (Other Infectious and Parasitic Diseases Diagnoses with CC, relative weight 1.0235), DRG 869 (Other Infectious and Parasitic Diseases Diagnoses without CC/MCC, relative weight 0.6787), DRG 974 (HIV with Major Related Condition with MCC, relative weight 3.0506), DRG 975 (HIV with Major Related Condition with CC, relative weight 1.3252) and DRG 976 (HIV with Major Related Condition without CC/MCC, relative weight 0.8124), in MDC 18 (Infectious and Parasitic Diseases, Systemic or Unspecified Sites) and MDC 25 (Human Immunodeficiency Virus Infections), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific salmonella infection codes (official index)
- with
- (gastro)enteritis A02.0 — Salmonella enteritis
- sepsis A02.1 — Salmonella sepsis
- specified manifestation NEC A02.8 — Other specified salmonella infections
- due to food (poisoning) A02.9 — Salmonella infection, unspecified
- hirschfeldii A01.3 — Paratyphoid fever C
- localized A02.20 — Localized salmonella infection, unspecified
- arthritis A02.23 — Salmonella arthritis
- meningitis A02.21 — Salmonella meningitis
- osteomyelitis A02.24 — Salmonella osteomyelitis
- pneumonia A02.22 — Salmonella pneumonia
- pyelonephritis A02.25 — Salmonella pyelonephritis
- specified NEC A02.29 — Salmonella with other localized infection
- paratyphi A01.4 — Paratyphoid fever, unspecified
- A A01.1 — Paratyphoid fever A
- B A01.2 — Paratyphoid fever B
- C A01.3 — Paratyphoid fever C
- schottmuelleri A01.2 — Paratyphoid fever B
- typhi, typhosa
Common questions about salmonella infection ICD-10 codes
What is the ICD-10 code for salmonella infection?
- A02.9 — Salmonella infection, unspecified. More specific codes apply when the documentation supports them: A02.0, A02.1, A02.8, A02.9 and others below.
What is the ICD-10 code for hirschfeldii salmonella infection?
- A01.3 — Paratyphoid fever C.
What is the ICD-10 code for localized salmonella infection?
- A02.20 — Localized salmonella infection, unspecified.
What is the ICD-10 code for paratyphi salmonella infection?
- A01.4 — Paratyphoid fever, unspecified.
What is the ICD-10 code for schottmuelleri salmonella infection?
- A01.2 — Paratyphoid fever B.
Is A02.9 billable?
- Yes. A02.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A02.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A02.9 as a principal diagnosis.
Is A02.9 a CC or MCC?
- A02.9 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.