Diabetes Equipment and Supplies - (0106) — MM 0106 | CIGNA Coverage Update

Cigna modified MM 0106, its continuous glucose monitoring coverage policy, effective February 24, 2026. Here's what changes for billing teams.

Cigna Healthcare updated Policy MM 0106, which governs durable medical equipment coverage for continuous glucose monitoring (CGM) systems. This modification affects nine HCPCS codes — including A4238, A4239, A9276, A9277, A9278, E2102, E2103, G0564, and E1399 — and draws a clear line between what Cigna will reimburse and what it classifies as experimental or investigational. If your practice or DME supplier bills CGM equipment and supplies to Cigna members, this coverage policy change applies to your claims now.

Quick-Reference Table

Cigna Continuous Glucose Monitor Coverage Criteria and Medical Necessity Requirements 2026

The Cigna continuous glucose monitor coverage policy under MM 0106 separates CGM equipment into two categories: nonimplanted noninterventional (nonadjunctive) systems and adjunctive systems. Each category has its own HCPCS codes, and meeting medical necessity criteria is what determines reimbursement.

For nonadjunctive CGM systems — devices where the glucose reading alone can drive a treatment decision without a confirmatory fingerstick — Cigna considers E2103 (the monitor or receiver) and A4239 (the supply allowance) medically necessary when criteria in the applicable coverage policy are met. These are the standalone CGM systems like the Dexterity-style readers where the number on the screen is actionable by itself.

For adjunctive CGM systems — where the device reading requires confirmation before dosing — Cigna covers E2102 (the monitor or receiver) and A4238 (the supply allowance) under the same medical necessity framework. The distinction matters for billing because you're not coding adjunctive and nonadjunctive interchangeably. The wrong E-code on a claim is a fast path to a claim denial.

The individual components of a CGM system have their own codes under MM 0106. Cigna considers A9276 (the subcutaneous disposable sensor), A9277 (the external transmitter), and A9278 (the external receiver or monitor) medically necessary when criteria are met. These codes apply to nondurable medical equipment interstitial CGM systems — the class of device that doesn't meet DME durability standards on its own.

For the implantable 365-day interstitial glucose sensor insertion, Cigna covers G0564. This code covers the creation of a subcutaneous pocket and insertion of the long-duration sensor — a meaningfully different clinical and billing scenario than disposable sensor supply codes. If your practice performs this procedure, confirm your prior authorization workflow includes G0564 explicitly. This is not a code you can slip through without documentation.

The Cigna CGM coverage policy does not specify a fee schedule for these codes within MM 0106 itself. Reimbursement rates follow your contracted rate schedule. But the medical necessity criteria in MM 0106 are the gate — you clear those, then you get paid at your contracted rate.

Cigna CGM Exclusions and Non-Covered Indications

E1399 is the one code in MM 0106 that Cigna treats differently from everything else on the list. Cigna classifies billing under E1399 — durable medical equipment, miscellaneous — as experimental, investigational, or unproven in this context.

This is the catch-all DME code. When a CGM product doesn't map cleanly to a specific HCPCS code, billers sometimes drop E1399 as a miscellaneous code to get a claim out the door. Cigna's MM 0106 update makes clear: that approach won't work here. If you bill E1399 for CGM equipment that belongs under one of the eight other covered codes, expect a denial.

The real issue is product classification. New CGM devices hit the market faster than HCPCS codes get assigned. If your practice is supplying a CGM device that doesn't have a current specific HCPCS code, you have two choices: wait for code assignment, or bill E1399 knowing Cigna will deny it as experimental. Neither is great. Talk to your compliance officer before billing E1399 for any CGM-related equipment under a Cigna plan.

Coverage Indications at a Glance

Cigna CGM Billing Guidelines and Action Items 2026

The effective date for MM 0106 is February 24, 2026. That means this is live now. Here's what your billing team needs to do.

HCPCS Codes for Continuous Glucose Monitoring Under Cigna MM 0106

Covered HCPCS Codes (When Medical Necessity Criteria Are Met)

Experimental / Investigational / Not Covered