M1311Medical Services
Anaphylaxis due to the vaccine on or before the date of the encounter
Short description: Aphlx to vax bef enc
- Effective date
- January 1, 2024
- Termination date
- —
Related codes (M-series)
M0001Advancing cancer care mvpM0002Opt care kidney hlth mvpM0003Opt care episod neuro mvpM0004Qual care neurologic cnd mvpM0005Value in primary care mvpM0010Eom meos paymentM0064Visit for drug monitoringM0075Cellular therapyM0076ProlotherapyM0100Intragastric hypothermiaM0201Pne flu hepb cov home adminM0220Tixagev and cilgav inj
Frequently asked questions
What is HCPCS code M1311?
M1311 is a HCPCS Level II code for Anaphylaxis due to the vaccine on or before the date of the encounter.
What category is HCPCS code M1311 in?
M1311 falls under the Medical Services category of HCPCS Level II.
When did HCPCS code M1311 become effective?
M1311 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.