HCPCS Modifier LM

Published 07/16/2020

Description
HCPCS modifier LM is used to identify the left main coronary artery.

Guidelines and Instructions
This modifier may be submitted with the following CPT codes:

  • 92920–92944
  • 92978
  • 92975
  • 92979
  • 92980
  • 92982
  • 92995–92996
  • 93454–93461
  • 93530–93533
This modifier may not be submitted with the following CPT codes:
  • 32701
  • 33361–33369  
  • 33990–33993  
  • 36221–36228
  • 37197
  • 37211–37214

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