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Adjunctive Nonimplanted Continuous Glucose Monitor Supplies

Washington 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?

$214

Typical negotiated rate. In Washington, July 2026.

Insurers have agreed to pay about $214 for this service. The price depends on where it is billed: about $214 from a physician practice, and about $331 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$214$158 to $229
FacilityA hospital or hospital-owned outpatient department$331$275 to $537

How much rates vary

Facilitymedian $331 · 10th to 90th $269 to $617Professionalmedian $214 · 10th to 90th $141 to $316
$100$200$500facility $331professional $214

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
$213.80
Median
$213.80
Typical High
$512.86
Aetna
Setting
Professional
Modifier
Global
Typical Low
$141.25
Median
$208.93
Typical High
$269.15
Cigna
Setting
Professional
Modifier
Global
Typical Low
$162.18
Median
$162.18
Typical High
$162.18
Kaiser Permanente
Setting
Facility
Modifier
Global
Typical Low
$537.03
Median
$616.60
Typical High
$794.33
Kaiser Permanente
Setting
Professional
Modifier
Global
Typical Low
$537.03
Median
$616.60
Typical High
$794.33
Molina
Setting
Professional
Modifier
Global
Typical Low
$39.81
Median
$50.12
Typical High
$239.88
Pacific Source
Setting
Facility
Modifier
Global
Typical Low
$269.15
Median
$331.13
Typical High
$537.03
Pacific Source
Setting
Professional
Modifier
Global
Typical Low
$275.42
Median
$331.13
Typical High
$331.13
Premera BCBS
Setting
Facility
Modifier
Global
Typical Low
$229.09
Median
$263.03
Typical High
$263.03
Premera BCBS
Setting
Professional
Modifier
Global
Typical Low
$229.09
Median
$229.09
Typical High
$269.15
United
Setting
Facility
Modifier
Global
Typical Low
$120.23
Median
$223.87
Typical High
$239.88
United
Setting
Professional
Modifier
Global
Typical Low
$107.15
Median
$144.54
Typical High
$263.03
Wellpoint
Setting
Professional
Modifier
Global
Typical Low
$371.54
Median
$371.54
Typical High
$371.54

Where Washington 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.

Washington· 12th of 51

$214

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.