ICD-10-CM A49.9 is the diagnosis code for Bacterial infection, unspecified. This code falls under the section "Other bacterial diseases" within Chapter 1 — Certain infectious and parasitic diseases (A00-B99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as A49.9. They are mutually exclusive:
Understanding where A49.9 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, A49.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
A49.9 is the ICD-10-CM diagnosis code for "Bacterial infection, unspecified". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of A49.9 is A49 ("Bacterial infection of unspecified site"). A49.9 provides a more specific classification within this category.
A49.9 is located in Section A30-A49 — "Other bacterial diseases" within Chapter 1 of the ICD-10-CM Tabular List.
Use A49.9 when the patients documented diagnosis matches "Bacterial infection, unspecified" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Bacterial infection, unspecified is A49.9.
Yes, A49.9 can be used as a primary diagnosis code since it is billable and specific.
A49.9 is in Chapter 1 of the ICD-10-CM Tabular List.
Type 1 Excludes for A49.9 include: bacteremia NOS (R78.81).
Yes, A49.9 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.