A03.1 Shigellosis due to Shigella flexneri

Billable ICD-10-CM code, FY2026.

Applicable to

• Group B shigellosis

MS-DRG index

Defines the logic of DRG(s) 371-373 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 004.1 Shigella flexneri

Code annotations containing back-references to A03.1

Back-references to A03

• Code First: M49 Spondylopathies in diseases classified elsewhere ("enterobacterial infections (A01-A04)")
• Type 2 Excludes: P37 Other congenital infectious and parasitic diseases ("infectious neonatal diarrhea (A00-A09)")

Diagnosis Index entries for A03.1

• Bacillus › Flexner's
• Diarrhea, diarrheal (disease) (infantile) (inflammatory) › Flexner's (ulcerative)
• Dysentery, dysenteric (catarrhal) (diarrhea) (epidemic) (hemorrhagic) (infectious) (sporadic) (tropical) › bacillary › Flexner
• Dysentery, dysenteric (catarrhal) (diarrhea) (epidemic) (hemorrhagic) (infectious) (sporadic) (tropical) › bacillary › Shigella › flexneri
• Dysentery, dysenteric (catarrhal) (diarrhea) (epidemic) (hemorrhagic) (infectious) (sporadic) (tropical) › bacillary › Shigella › group B
• Dysentery, dysenteric (catarrhal) (diarrhea) (epidemic) (hemorrhagic) (infectious) (sporadic) (tropical) › Flexner's
• Dysentery, dysenteric (catarrhal) (diarrhea) (epidemic) (hemorrhagic) (infectious) (sporadic) (tropical) › Hiss-Russell
• Flexner's dysentery
• Hiss-Russell dysentery
• Infection, infected, infective (opportunistic) › Bacillus › Flexner's
• Infection, infected, infective (opportunistic) › Shigella › flexneri
• Infection, infected, infective (opportunistic) › Shigella › group › B
• Shigellosis › Group B

Nearby codes

• A03 Shigellosis
• A03.0 Shigellosis due to Shigella dysenteriae
• A03.1 Shigellosis due to Shigella flexneri (this code)
• A03.2 Shigellosis due to Shigella boydii
• A03.3 Shigellosis due to Shigella sonnei
• A03.8 Other shigellosis
• A03.9 Shigellosis, unspecified