M1311
HCPCSAphlx to vax bef enc
Official HCPCS Level II long descriptor
Anaphylaxis due to the vaccine on or before the date of the encounter
HCPCS Level II code M1311 is maintained by CMS and is active in the current quarterly release.
Short descriptor
Aphlx to vax bef enc
Added to HCPCS: 2024-01-01
Nearby codes in M1
- M1303Hospc serv dur meas pd
- M1304No pneum vax admin 19+
- M1305Pneum vax admin 19+
- M1306Pt anphx due to pneum
- M1307Doc pt pal or hospice
- M1308Flu immunize no admin
- M1309Pall serv during meas
- M1310Pt scr tob & cess int
- M1312No pt tbco scrn rng
- M1313No tob scr/cess int
- M1314Bmi not calculated
- M1315Crc no doc no rsn
- M1316Tobacco non-user
- M1317Pts counsl cpt opt out
- M1318Pts no csp doc contact
- M1319Pts csp doc contact
Where this code sits
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HCPCS Level II July 2026 quarterly update. Centers for Medicare & Medicaid Services (CMS), “July 2026 Alpha-Numeric HCPCS File” (HCPC2026_JUL_ANWEB_06172026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.