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We look forward to continued collaboration with our provider partners to deliver quality care, improve outcomes and increase satisfaction for our collective members.

What's In This Section?

SCAN believes that sharing information is one way to ensure that we’re WITH our members, giving them the best care possible. On this website you will find helpful information and resources meant specifically for providers and office staff, including information on member eligibility, claims, medical policies, pharmacy, CMS programs, and much more. If you have any questions about this website, please contact your Network Management Specialist.

Continuous Glucose Monitor CGM FAQ

What are the CGM coverage requirements under Medicare?

CGMs are covered for members who:

  • Have been diagnosed with diabetes mellitus; AND
  • Administer insulin at least 3 times per day or use a continuous insulin pump; AND
  • Adjust insulin doses frequently based on the testing results; AND
  • Have had a visit within the last six (6) months with his or her prescriber

All coverage requests should be submitted through the member’s medical group.  For Medicare coverage policies, please see Local Coverage Determination (LCD): Glucose Monitors (L33822) and Local Coverage Article: Glucose Monitor - Policy Article (A52464).

What are the differences between non-adjunctive vs. adjunctive CGMs?

Non-adjunctive CGMs can be used as a complete replacement for traditional fingerstick blood glucose testing supplies and do not require a separate blood glucose monitor (BGM) to confirm testing results.

Adjunctive CGMs must be used in conjunction with standard finger stick tests using a home BGM to confirm testing results.

Both non-adjunctive and adjunctive CGMs are considered DME.

Why is my patient’s CGM rejecting/not covered at the pharmacy?

CGM supplies are covered under the durable medical equipment (DME) benefit under Medicare. For SCAN members, DME supplies are provided by the medical group’s contracted DME supplier and are not coverable under the pharmacy benefit.

My patient previously received a fill at the pharmacy, why is their CGM refill now rejecting?

Your patient may have received a temporary fill during their first 90 days of enrollment with SCAN at the pharmacy. Known as a transition fill, this allows patients to have access to these CGM supplies while they are new to the plan. This transition fill also allows you time to request authorization (referral) from the medical group to cover and supply CGMs under the DME benefit.

Why are CGMs covered under the DME benefit and not the pharmacy benefit (Part D)?

Medicare covers CGMs under the DME benefit. For SCAN members, this benefit is managed by the medical group and will not be covered at the pharmacy. Please make sure you DO NOT send an authorization request to Express Scripts. They only manage pharmacy authorizations and will not process your request.

What are the next steps to ensure my patient receives their CGMs in a timely manner?

Submit an authorization to your patient’s medical group with the appropriate CGM DME supply codes to ensure the CGM gets covered. 

CGM Type
Common Examples
Receiver (monitor), dedicated, for use with non-adjunctive glucose continuous monitor system
Freestyle Libre 14 Day Reader
FreeStyle Libre 2 Reader
FreeStyle Libre 3 Reader
Dexcom G5 Receiver
Dexcom G6 Receiver
Supply allowance for non-adjunctive continuous glucose monitor (CGM), includes all supplies and accessories, 1 month supply = 1 Unit of Service
FreeStyle Libre 2 Sensors
FreeStyle Libre 3 Sensors
Dexcom G5 Sensors
Dexcom G5 Transmitters
Dexcom G6 Sensors
Dexcom G6 Transmitters
Adjunctive continuous glucose monitor or receiver
Minimed 630G System
Minimed 670G System
Minimed 770G System
Supply allowance for adjunctive continuous glucose monitor (CGM), includes all supplies and accessories, 1 month supply = 1 unit of service
Guardian Sensor 3
Guardian Sensor 3 Kit
Guardian Transmitter 3
Guardian Transmitter 3 Kit
Enlite Sensor
Enlite Sensor Kit
Commonly Used ICD-10 Diagnosis Codes (for full list refer to LCA A52464)
Type 1 diabetes mellitus without complications
Type 2 diabetes mellitus with hyperglycemia
Type 1 diabetes mellitus with hyperglycemia
Type 2 diabetes mellitus with unspecified complications
Type 2 diabetes mellitus without complications
What kind of documentation needs to be submitted to my patient’s medical group or DME vendor?
Generally, the following information should be provided to your patient’s medical group:
  1. Documentation showing that your patient meets the criteria to use CGM supplies.
  2. Prescription for CGM supplies (refer to HCPCS and ICD-10 codes listed above).
  3. Documentation showing that your patient’s diabetes diagnosis will be re-evaluated and managed every 6 months.
Additional information may be requested from the medical group.
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