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Adjunctive Nonimplanted Continuous Glucose Monitor Supplies

Massachusetts rates for HCPCS A4238

Supply allowance for adjunctive, nonimplanted continuous glucose monitor (CGM), includes all supplies and accessories, 1 month supply = 1 unit of service

Rates data updated July 2026.

How much does Adjunctive Nonimplanted Continuous Glucose Monitor Supplies cost?

$240

Typical negotiated rate. In Massachusetts, July 2026.

Insurers have agreed to pay about $240 for this service. The price depends on where it is billed: about $240 from a physician practice, and about $363 from a hospital or other facility. The two figures are alternatives, not parts of one bill.

These are rates insurers have negotiated with providers, not the amount a patient is billed. What you owe depends on your plan's deductible and coinsurance. Based on rates published by 8 insurance carriers under federal price transparency rules.

Where it's billed changes the price

Billed byTypicalRange
Physician practiceA doctor's office, clinic or independent provider$240$174 to $240
FacilityA hospital or hospital-owned outpatient department$363$295 to $447

How much rates vary

Facilitymedian $363 · 10th to 90th $174 to $661Professionalmedian $240 · 10th to 90th $145 to $282
$100$200$500$1K$2K$5Kfacility $363professional $240

Distribution of negotiated rates across all payers (price axis is log-scale). Each curve is scaled to its own total: facility and professional rates are different services, shown together to compare where they cluster. Need provider-level prices or 24+ months of history? Contact us.

Rates by insurance carrier

Insurance Carrier
Aetna
Setting
Facility
Modifier
Global
Typical Low
$173.78
Median
$173.78
Typical High
$173.78
Aetna
Setting
Professional
Modifier
Global
Typical Low
$147.91
Median
$190.55
Typical High
$251.19
AllWays Health Partners
Setting
Facility
Modifier
Global
Typical Low
$263.03
Median
$281.84
Typical High
$1,548.82
AllWays Health Partners
Setting
Professional
Modifier
Global
Typical Low
$144.54
Median
$269.15
Typical High
$457.09
BCBS
Setting
Facility
Modifier
Global
Typical Low
$316.23
Median
$380.19
Typical High
$501.19
Cigna
Setting
Professional
Modifier
Global
Typical Low
$162.18
Median
$162.18
Typical High
$162.18
Fallon Health
Setting
Facility
Modifier
Global
Typical Low
$60.26
Median
$295.12
Typical High
$8,511.38
Harvard Pilgrim
Setting
Professional
Modifier
Global
Typical Low
$239.88
Median
$239.88
Typical High
$257.04
Mass General Brigham
Setting
Facility
Modifier
Global
Typical Low
$263.03
Median
$281.84
Typical High
$1,548.82
Mass General Brigham
Setting
Professional
Modifier
Global
Typical Low
$144.54
Median
$269.15
Typical High
$457.09
United
Setting
Facility
Modifier
Global
Typical Low
$194.98
Median
$194.98
Typical High
$281.84
United
Setting
Professional
Modifier
Global
Typical Low
$144.54
Median
$239.88
Typical High
$269.15

Where Massachusetts sits

The same service costs 1.9 times more in Oregon than in Oklahoma. Every bar is a state, most expensive first. Touch or drag across it to read any state, then open that state for its carriers and full range.

Massachusetts· 9th of 51

$240

OR $275OK $145

Median negotiated rate in each state, from every insurer that publishes one. States where no insurer publishes a rate for this service are not shown.