A51.46 – Secondary syphilitic osteopathy

ICD-10-CM 2027 diagnosis code · Infections with a predominantly sexual mode of transmission

Billable code

ICD-10-CM code A51.46

Code: A51.46 (claims format: A5146)
Description: Secondary syphilitic osteopathy
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: A51 › A51.4

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):

nonspecific and nongonococcal urethritis (N34.1)
Reiter's disease (M02.3-)

Excludes2 (not included here):

human immunodeficiency virus [HIV] disease (B20)

Index terms for A51.46

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in A51.4

A51.41 – Secondary syphilitic meningitisBillable
A51.42 – Secondary syphilitic female pelvic diseaseBillable
A51.43 – Secondary syphilitic oculopathyBillable
A51.44 – Secondary syphilitic nephritisBillable
A51.45 – Secondary syphilitic hepatitisBillable
A51.49 – Other secondary syphilitic conditionsBillable

Frequently asked questions

What is ICD-10 code A51.46?

A51.46 is the ICD-10-CM code for secondary syphilitic osteopathy, in the block A50-A64 (Infections with a predominantly sexual mode of transmission).

Is A51.46 a billable code?

Yes. A51.46 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does A51.46 belong to?

It belongs to category A51 – Early 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.