A64 – Unspecified sexually transmitted disease
ICD-10-CM 2027 diagnosis code · Infections with a predominantly sexual mode of transmission
ICD-10-CM code
A64
- Code
A64(claims format:A64)- Description
- Unspecified sexually transmitted disease
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 1. Certain infectious and parasitic diseases (A00-B99)
- Block
- A50-A64 Infections with a predominantly sexual mode of transmission
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Block A50-A64
Excludes1 (not coded here):
Excludes2 (not included here):
- human immunodeficiency virus [HIV] disease (B20)
Index terms for A64
Entries in the ICD-10-CM alphabetic index that lead to this code:
Frequently asked questions
What is ICD-10 code A64?
A64 is the ICD-10-CM code for unspecified sexually transmitted disease, in the block A50-A64 (Infections with a predominantly sexual mode of transmission).
Is A64 a billable code?
Yes. A64 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.