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A03 ⚠ Non-billable

Shigellosis

ICD-10-CM · FY2026 · Certain Infectious and Parasitic Diseases

Code
A03
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Certain Infectious and Parasitic Diseases
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code A03?
ICD-10-CM code A03 represents Shigellosis. It is a non-billable header code requiring a more specific subcategory in the Certain Infectious and Parasitic Diseases chapter, effective October 1, 2025 – September 30, 2026.
Is A03 billable?
No. A03 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is A03 in?
A03 belongs to the Certain Infectious and Parasitic Diseases chapter (A00–B99) of ICD-10-CM.

Related codes in the A03 category

A03.0 Shigellosis due to Shigella dysenteriae Billable A03.1 Shigellosis due to Shigella flexneri Billable A03.2 Shigellosis due to Shigella boydii Billable A03.3 Shigellosis due to Shigella sonnei Billable A03.8 Other shigellosis Billable A03.9 Shigellosis, unspecified Billable

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