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The rules say that plans must pay for a medical service or item if regular Medicare would pay for it in this case. You can find this rule at 42 Code of Federal Regulations (CFR) Section 422.101.
The rules say that Medicare pays for therapeutic continuous glucose monitors (CGMs) when they are medically reasonable and necessary. Therapeutic CGMs are defined in CMS Ruling 1682R. You can find these rules in Local Coverage Article A52464, effective on and after January 12, 2017. CGMs consist of three components: a glucose sensor, a transmitter, and a receiver. CGMs are considered therapeutic CGMs if they are: - approved by the FDA for use in place of a blood glucose monitor for making diabetes treatment decisions (for example, changes in diet and insulin dosage); - generally not useful to the individual in the absence of an illness or injury; - appropriate for use in the home; and - those which include a durable component that can withstand repeated use, are expected to last at least three years, and are capable of displaying the trending of the continuous glucose measurements. The rules also say that a CGM which does not replace a blood glucose monitor for making diabetes treatment decisions is not covered. You can find these rules in CMS Ruling 1682R. The rules say that to be eligible for coverage of home blood glucose monitors and related accessories and supplies, the beneficiary must meet both of the following basic criteria (1) - (2): 1. The beneficiary has diabetes; and 2. The beneficiary's treating practitioner has concluded that the beneficiary (or the beneficiary's caregiver) has sufficient training using the particular device prescribed as evidenced by providing a prescription for the appropriate supplies and frequency of blood glucose testing. You can find this rule in Local Coverage Determination (LCD): Glucose Monitors (L33822) - Effective January 1, 2020. The rules say that CGM devices covered by Medicare under the DME benefit are defined in CMS Ruling 1682R as therapeutic CGMs. Therapeutic CGMs and related supplies are covered by Medicare when all of the following coverage criteria (1-6) are met: 1. The beneficiary has diabetes mellitus and, 2. The beneficiary has been using a BGM and performing frequent (four or more times a day) testing; and, 3. The beneficiary is insulin-treated with multiple (three or more) daily injections of insulin or a Medicare-covered continuous subcutaneous insulin infusion (CSII) pump; and, 4. The beneficiary's insulin treatment regimen requires frequent adjustment by the beneficiary on the basis of BGM or CGM testing results; and, 5. Within six (6) months prior to ordering the CGM, the treating practitioner has an in-person visit with the beneficiary to evaluate their diabetes control and determined that criteria (1-4) above are met; and, 6. Every six (6) months following the initial prescription of the CGM, the treating practitioner has an in-person visit with the beneficiary to assess adherence to their CGM regimen and diabetes treatment plan. You can find this rule in Local Coverage Determination (LCD): Glucose Monitors (L33822) - Effective January 1, 2020.
If you want to read these Medicare rules, you can go to this website www.medicareappeal.com.
The Plan contract says that the Plan covers items and services in accordance with Medicare rules.