Is ICD-10-CM code A49 billable?

No, A49 (Bacterial infection of unspecified site) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code A49 belong to?

A49 belongs to Chapter 1 of the ICD-10-CM tabular list: A00–B99 (Certain Infectious and Parasitic Diseases).

A49Non-billable

Bacterial infection of unspecified site

Certain Infectious and Parasitic Diseases·Other bacterial diseases (A30-A49)·category·FY 2026

Use a more specific code (5 billable, 1 non-billable)

A49.0Staphylococcal infection, unspecified sitehas subcodes A49.1Streptococcal infection, unspecified site A49.2Hemophilus influenzae infection, unspecified site A49.3Mycoplasma infection, unspecified site A49.8Other bacterial infections of unspecified site A49.9Bacterial infection, unspecified

CH1 Parent Instructions

Includes

diseases generally recognized as communicable or transmissible

Excludes1(Not coded here. Use a different code.)

certain localized infections - see body system-related chapters

Excludes2(Not included here. Code separately if applicable.)

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.-)

Instructional Notes

Excludes1(Not coded here. Use a different code.)

bacterial agents as the cause of diseases classified elsewhere (B95-B96)
chlamydial infection NOS (A74.9)
meningococcal infection NOS (A39.9)
rickettsial infection NOS (A79.9)
spirochetal infection NOS (A69.9)

Clinical Hierarchy

BillableHas subcodes

CH1Certain infectious and parasitic diseases (A00-B99)

A30-A49Other bacterial diseases (A30-A49)

A49Bacterial infection of unspecified siteNot billable

A49.0Staphylococcal infection, unspecified siteSubcodes

A49.1Streptococcal infection, unspecified siteBillable

A49.2Hemophilus influenzae infection, unspecified siteBillable

A49.3Mycoplasma infection, unspecified siteBillable

A49.8Other bacterial infections of unspecified siteBillable

A49.9Bacterial infection, unspecifiedBillable

MS-DRG Classification

2026

No direct MS-DRG triggers identified.