A50.9 – Congenital syphilis, unspecified
ICD-10-CM 2027 diagnosis code · Infections with a predominantly sexual mode of transmission
ICD-10-CM code
A50.9
- Code
A50.9(claims format:A509)- Description
- Congenital syphilis, unspecified
- 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
- Parent codes
- A50
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 A50.9
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in A50
- A50.0 – Early congenital syphilis, symptomaticHeader
- A50.1 – Early congenital syphilis, latentBillable
- A50.2 – Early congenital syphilis, unspecifiedBillable
- A50.3 – Late congenital syphilitic oculopathyHeader
- A50.4 – Late congenital neurosyphilis [juvenile neurosyphilis]Header
- A50.5 – Other late congenital syphilis, symptomaticHeader
- A50.6 – Late congenital syphilis, latentBillable
- A50.7 – Late congenital syphilis, unspecifiedBillable
Frequently asked questions
What is ICD-10 code A50.9?
A50.9 is the ICD-10-CM code for congenital syphilis, unspecified, in the block A50-A64 (Infections with a predominantly sexual mode of transmission).
Is A50.9 a billable code?
Yes. A50.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does A50.9 belong to?
It belongs to category A50 – Congenital syphilis.
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.