M1299Medical Services

Influenza immunization administered or previously received

Short description: Flu immunize order/admin

Effective date
January 1, 2024
Termination date

Related codes (M-series)

Frequently asked questions

What is HCPCS code M1299?

M1299 is a HCPCS Level II code for Influenza immunization administered or previously received.

What category is HCPCS code M1299 in?

M1299 falls under the Medical Services category of HCPCS Level II.

When did HCPCS code M1299 become effective?

M1299 has been effective since January 1, 2024, per CMS's quarterly HCPCS update.

HCPCS Level II data from CMS (public domain). HCPCS Level I (CPT) codes are not included — CPT is copyrighted by the American Medical Association. Always verify codes with authoritative sources before making coding or billing decisions.