A30-A49

Non-Billable
ChapterA00–B99
Rankblock
Official Description

Other bacterial diseases (A30-A49)

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99).

CH1 Parent Instructions

Includes
  • diseases generally recognized as communicable or transmissible
Excludes1(Not coded here)
  • certain localized infections - see body system-related chapters
Excludes2(Not included here)
  • carrier or suspected carrier of infectious disease (Z22.-)
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)
Use Additional Code
  • code to identify resistance to antimicrobial drugs (Z16.-)

Clinical Hierarchy

CH1Certain infectious and parasitic diseases (A00-B99)
A30-A49Other bacterial diseases (A30-A49)
A30Leprosy [Hansen's disease]
A31Infection due to other mycobacteria
A32Listeriosis
A33Tetanus neonatorum
A34Obstetrical tetanus
A35Other tetanus
A36Diphtheria
A37Whooping cough
A38Scarlet fever
A39Meningococcal infection
A40Streptococcal sepsis
A41Other sepsis
A42Actinomycosis
A43Nocardiosis
A44Bartonellosis
A46Erysipelas
A48Other bacterial diseases, not elsewhere classified
A49Bacterial infection of unspecified site

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to A30-A49:

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

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Other bacterial diseases (A30-A49).

Search PCS Codes