A03.3

Billable
ChapterA00–B99
Ranksubcategory
Official Description

Shigellosis due to Shigella sonnei

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99).

Instructional Notes

Includes
  • Group D shigellosis
General instructions are available for the parent sections:
View CH1 Notes

Clinical Hierarchy

CH1Certain infectious and parasitic diseases (A00-B99)
A00-A09Intestinal infectious diseases (A00-A09)
A03Shigellosis
A03.3Shigellosis due to Shigella sonnei

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to A03.3:

chapterCH1
Certain infectious and parasitic diseases (A00-B99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to A03.3. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

8 raw paths
Dysentery, dysenteric (catarrhal) (diarrhea) (epidemic) (hemorrhagic) (infectious) (sporadic) (tropical)4 unique routes
bacillary(3 variants)
Shigella(2 variants)
group D→A03.3
sonnei→A03.3
Sonne→A03.3
Sonne→A03.3
Infection, infected, infective (opportunistic)2 unique routes
Shigella(2 variants)
group
D→A03.3
sonnei→A03.3
Shigellosis1 unique routes
Group D→A03.3
Sonne dysentery1 unique routes
Direct index entry→A03.3

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 371
Major Gastrointestinal Disorders and Peritoneal Infections with MCC
DRG 372
Major Gastrointestinal Disorders and Peritoneal Infections with CC
DRG 373
Major Gastrointestinal Disorders and Peritoneal Infections without CC/MCC

Cross Reference

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