2024 ICD-10-CM Diagnosis Code A56

Other sexually transmitted chlamydial diseases

• A56 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
• The 2024 edition of ICD-10-CM A56 became effective on October 1, 2023.
• This is the American ICD-10-CM version of A56 – other international versions of ICD-10 A56 may differ.

Type 1 Excludes

• neonatal chlamydial conjunctivitis (P39.1)
• neonatal chlamydial pneumonia (P23.1)

Type 2 Excludes

• chlamydial lymphogranuloma (A55)
• conditions classified to A74.-

Includes

• sexually transmitted diseases due to Chlamydia
• trachomatis

The following code(s) above A56 contain annotation back-references

 that may be applicable to A56:

• A00-B99  Certain infectious and parasitic diseases
• A50-A64  Infections with a predominantly sexual mode of transmission

Code History

• 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
• 2017 (effective 10/1/2016): No change
• 2018 (effective 10/1/2017): No change
• 2019 (effective 10/1/2018): No change
• 2020 (effective 10/1/2019): No change
• 2021 (effective 10/1/2020): No change
• 2022 (effective 10/1/2021): No change
• 2023 (effective 10/1/2022): No change
• 2024 (effective 10/1/2023): No change