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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 October 2026.

How much does Adjunctive Nonimplanted Continuous Glucose Monitor Supplies cost?

$229

Typical negotiated rate. In Washington, October 2026.

Insurers have agreed to pay about $229 for this service. The price depends on where it is billed: about $229 from a physician practice, and about $275 from a hospital or other facility.

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 10 insurance carriers under federal price transparency rules.

Prices by location type

Billed byTypicalRange
Physician practiceA doctor's office, clinic or independent provider$229$162 to $269
FacilityA hospital or hospital-owned outpatient department$275$245 to $501

How much rates vary

Facilitymedian $275 · 10th to 90th $204 to $537Professionalmedian $229 · 10th to 90th $145 to $525
$50$100$200$500$1K$2Kfacility $275professional $229

Distribution of negotiated rates across all payers (price axis is log-scale). Need provider-level prices or 24+ months of history? Contact us.

Rates by insurance carrier

Insurance Carrier
Aetna
Setting
Facility
Modifier
None
Typical Low
$213.80
Median
$213.80
Typical High
$213.80
Aetna
Setting
Professional
Modifier
None
Typical Low
$213.80
Median
$213.80
Typical High
$213.80
Asuris Northwest Health
Setting
Facility
Modifier
None
Typical Low
$70.79
Median
$204.17
Typical High
$245.47
Asuris Northwest Health
Setting
Professional
Modifier
None
Typical Low
$1,445.44
Median
$2,398.83
Typical High
$2,398.83
Asuris Northwest Health
Setting
Professional
Modifier
KF · Class III device
Typical Low
$239.88
Median
$239.88
Typical High
$295.12
Cigna
Setting
Professional
Modifier
None
Typical Low
$162.18
Median
$162.18
Typical High
$162.18
Kaiser Permanente
Setting
Professional
Modifier
None
Typical Low
$263.03
Median
$346.74
Typical High
$676.08
Molina
Setting
Professional
Modifier
None
Typical Low
$44.67
Median
$44.67
Typical High
$60.26
Pacific Source
Setting
Facility
Modifier
None
Typical Low
$269.15
Median
$331.13
Typical High
$549.54
Pacific Source
Setting
Professional
Modifier
None
Typical Low
$346.74
Median
$346.74
Typical High
$346.74
Premera BCBS
Setting
Facility
Modifier
None
Typical Low
$229.09
Median
$263.03
Typical High
$263.03
Premera BCBS
Setting
Facility
Modifier
KF · Class III device
Typical Low
$309.03
Median
$416.87
Typical High
$630.96
Premera BCBS
Setting
Professional
Modifier
None
Typical Low
$229.09
Median
$229.09
Typical High
$229.09
Premera BCBS
Setting
Professional
Modifier
KF · Class III device
Typical Low
$229.09
Median
$229.09
Typical High
$229.09
Regence BlueShield
Setting
Facility
Modifier
KF · Class III device
Typical Low
$269.15
Median
$269.15
Typical High
$269.15
Regence BlueShield
Setting
Professional
Modifier
KF · Class III device
Typical Low
$229.09
Median
$239.88
Typical High
$295.12
United
Setting
Professional
Modifier
None
Typical Low
$144.54
Median
$144.54
Typical High
$263.03
Wellpoint
Setting
Professional
Modifier
None
Typical Low
$371.54
Median
$371.54
Typical High
$371.54

Where Washington sits

The same service costs 2.1 times more in Montana than in Hawaii. 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· 17th of 51

$229

MT $282HI $135

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.