Early syphilis
A51.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2023 edition of ICD-10-CM A51.9 became effective on October 1, 2022.
This is the American ICD-10-CM version of A51.9 – other international versions of ICD-10 A51.9 may differ.