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A51.3

Non-billable

Secondary syphilis of skin and mucous membranes

A51.3 is the ICD-10-CM code for Secondary syphilis of skin and mucous membranes. It is a non-billable category code — use a more specific child code such as A51.31 for billing.

Status
Header (non-billable)
Chapter
A00-B99
Parent
A51
Subcodes
3
Edition
FY2026

A00-B99 Certain infectious and parasitic diseases

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code A51.3?
A51.3 is the ICD-10-CM code for "Secondary syphilis of skin and mucous membranes". It falls under A00-B99 Certain infectious and parasitic diseases.
Is A51.3 a billable code?
No — A51.3 is a non-billable header code. Use a more specific child code (such as A51.31) for billing.
What are the subcodes of A51.3?
A51.3 has 3 more specific child codes, including A51.31, A51.32, A51.39.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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