Skip to Main Content

Print | Bookmark | | Font Size: + |

Fact Sheet

RT and LT Modifiers Fact Sheet

Medicare requires the use of the right (RT) and left (LT) modifiers for certain HCPCS codes. Suppliers must use the RT and LT modifiers when billing two of same item or accessory on the same date of service when the items are being used bilaterally.

Suppliers must bill each item on two separate claim lines using the RT and LT modifiers and 1 unit of service on each claim line. Do not use the combination RTLT modifier on the same claim line and bill with 2 units of service.

Claim lines for HCPCS codes requiring use of the RT and LT modifiers, billed without the RT and/or LT modifiers or with the RTLT on a single claim line, will be rejected as incorrect coding.

Refer to the following resources for more coding and documentation requirements

Resources:

  • Ankle-Foot/Knee-Ankle-Foot Orthoses (A52457External Website)
  • External Breast Prostheses (A52478External Website)
  • External Upper Limb Tremor Stimulator Therapy (A59680External Website)
  • Eye Prostheses (A52462External Website)
  • Facial Prostheses (A52463External Website)
  • Knee Orthoses (A52465External Website)
  • Lower Limb Prostheses (A52496External Website)
  • Orthopedic Footwear (A52481External Website)
  • Refractive Lenses (A52499External Website)
  • Surgical Dressings (A54563External Website)
  • Therapeutic Shoes for Persons with Diabetes (A52501External Website)
  • Standard Documentation Requirements Policy Article (A55426External Website)

Published: December 16, 2024

spacer

26 Century Blvd Ste ST610, Nashville, TN 37214-3685 © CGS Administrators, LLC. All Rights Reserved