Continuous Glucose Monitors (CGMs) Supply Allowance

When a CGM (code E2102 or E2103) is covered, the related supply allowance (code A4238 or A4239) is also covered. CGM Supply Allowance HCPCS codes A4238 and A4239 Include:

A4238 (supply allowance for adjunctive, non-implanted CGM) includes all items necessary for the use of the device.

  • Do not bill these items separately: CGM sensors and transmitters.
  • Code A4238 does not include a home blood glucose monitor and related BGM testing supplies and these items may be billed separately.

A4239 (supply allowance for non-adjunctive, non-implanted CGM) includes all items necessary for the use of the device.

  • Do not be bill these items separately: CGM sensors, CGM transmitters, home blood glucose monitors (BGMs), related BGM supplies (test strips, lancets, lancing devices, and calibration solutions), batteries, or any other items needed to use the device.

Additional information on the CGM supply fee codes can be found in the Glucose Local Coverage Determination (LCD) L33822 and Glucose Monitor policy article A52464.

Last Updated Oct 22 , 2024