Other bacterial diseases (A30-A49) ICD-10-CM
The A30–A49 section covers other bacterial diseases with 144 ICD-10-CM diagnosis codes, of which 115 are billable in fiscal year 2027. The section is organized into the 18 code ranges listed below.
Code Ranges in This Section 18 ranges · 144 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the A30–A49 Code Range
These bacterial diseases include named infections, sepsis, and infections for which the body site is not specified.
A30 separates forms of leprosy, a long-lasting infection affecting the skin, mucous membranes, and peripheral nerves. A31 separates mycobacterial infections by where they occur or whether they have spread. A32 separates forms of listeriosis, including skin infection, meningitis, and sepsis.
The tetanus categories distinguish newborns, obstetrical cases, and other cases: A33, A34, and A35. A36 separates diphtheria by affected site; A37 separates whooping cough by Bordetella species. A38 distinguishes scarlet fever by complication, while A39 separates forms of meningococcal infection.
A40 and A41 distinguish sepsis by the organism named. A42, A43, and A44 separate their respective infections by site or form. A46 identifies erysipelas. A48 groups other named bacterial diseases; A49 distinguishes infections of unspecified site by organism.
Questions About This Page
How many codes are in the A30-A49 range?
The A30-A49 range contains 144 ICD-10-CM diagnosis codes in FY 2027. 115 of them are billable, and the rest are category headers that organize the section.
What conditions does A30-A49 cover?
The range covers other bacterial diseases. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
