Continuous glucose monitor (CGM) HCPCS code
A continuous glucose monitor (CGM) is usually billed under HCPCS code E2102 (Adjunctive, non-implanted continuous glucose monitor or receiver); related codes are E2103, A4238, A4239. The 2026 Medicare DMEPOS fee schedule pays $189.08 to $239.22 (NU, new equipment, purchased) for E2102, depending on the state. Medicare paid for 10,777 E2102 services from 30 suppliers in 2024.
HCPCS codes for continuous glucose monitor (CGM)
| Code | Description | Medicare coverage | DMEPOS fee (state range) | Medicare services |
|---|---|---|---|---|
| E2102 | Adjunctive, non-implanted continuous glucose monitor or receiver | Carrier judgment | $189.08–$239.22 (NU) | 10,777 (2024) |
| E2103 | Non-adjunctive, non-implanted continuous glucose monitor or receiver | Carrier judgment | $256.09–$334.44 (NU) | 297,173 (2024) |
| A4238 | Supply allowance for adjunctive, non-implanted continuous glucose monitor (CGM), includes all supplies and accessories, 1 month supply = 1 unit of service | Carrier judgment | $280.71 (KF) | 161,814 (2024) |
| A4239 | Supply allowance for non-adjunctive, non-implanted continuous glucose monitor (CGM), includes all supplies and accessories, 1 month supply = 1 unit of service | Carrier judgment | $273.28 | 7,094,388 (2024) |
Medicare revenue estimate for E2102
Units per month × state fee = monthly Medicare revenue. At 10 units a month, E2102 (NU) pays $2,392.20 in AZ and $1,890.80 in IN, before the 20% patient coinsurance.
Medicare coverage policy
Frequently asked questions
What is the HCPCS code for a continuous glucose monitor (CGM)?
E2102: Adjunctive, non-implanted continuous glucose monitor or receiver. Other continuous glucose monitor (CGM) codes: E2103 (Non-adju cgm receiver/mon); A4238 (Adju cgm supply allowance); A4239 (Non-adju cgm supply allow).
Does Medicare cover a continuous glucose monitor (CGM)?
By HCPCS coverage code — E2102: Carrier judgment; E2103: Carrier judgment; A4238: Carrier judgment; A4239: Carrier judgment.
How much does Medicare pay for a continuous glucose monitor (CGM)?
Under the 2026 DMEPOS fee schedule (non-rural state fees): E2102 $189.08 to $239.22 (NU, new equipment, purchased); E2103 $256.09 to $334.44 (NU, new equipment, purchased); A4238 $280.71 (KF, FDA Class III device); A4239 $273.28.
Next steps
- Run a reimbursement report for a device billed under E2102
- Watch E2102 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for E2102
Part of Diabetes devices and supplies.
Related equipment
Sources: CMS HCPCS Level II; CMS DMEPOS fee schedule 2026; CMS Medicare utilization; CMS Medicare Coverage Database. Fees are Medicare allowables (non-rural, by state), not commercial rates. Code choice depends on the exact item; check the descriptor. Not billing or legal advice.