Non-Billable / Non-Specific Code
ICD-10-CM A56 is the diagnosis code for Other sexually transmitted chlamydial diseases. This code falls under the section "Infections with a predominantly sexual mode of transmission" within Chapter 1 â Certain infectious and parasitic diseases (A00-B99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. 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 A56. They are mutually exclusive:
The following conditions are not included in A56. If the patient has both, code each condition separately:
Understanding where A56 sits in the ICD-10-CM classification helps ensure proper coding:
No, A56 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
A56 is the ICD-10-CM diagnosis code for "Other sexually transmitted chlamydial diseases". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
A56 is located in Section A50-A64 â "Infections with a predominantly sexual mode of transmission" within Chapter 1 of the ICD-10-CM Tabular List.
A56 has 6 sub-code(s) that provide more specific detail: A56.0, A56.1, A56.2, A56.3, A56.4 and more.
Use A56 when the patients documented diagnosis matches "Other sexually transmitted chlamydial diseases" 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 Other sexually transmitted chlamydial diseases is A56.
No, A56 is non-billable. Use a more specific sub-code for primary diagnosis billing.
A56 is in Chapter 1 of the ICD-10-CM Tabular List.
Type 1 Excludes for A56 include: neonatal chlamydial conjunctivitis (P39.1); neonatal chlamydial pneumonia (P23.1).
Yes, A56 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.