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Adjunctive Nonimplanted Continuous Glucose Monitor Supplies

California 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?

$209

Typical negotiated rate. In California, July 2026.

Insurers have agreed to pay about $209 for this service. The price depends on where it is billed: about $182 from a physician practice, and about $229 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$182$145 to $224
FacilityA hospital or hospital-owned outpatient department$229$204 to $316

How much rates vary

Facilitymedian $229 · 10th to 90th $182 to $575Professionalmedian $182 · 10th to 90th $135 to $275
$100$200$500$1K$2Kfacility $229professional $182

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
$141.25
Median
$141.25
Typical High
$151.36
Aetna
Setting
Professional
Modifier
Global
Typical Low
$134.90
Median
$194.98
Typical High
$251.19
Anthem BCBS
Setting
Facility
Modifier
Global
Typical Low
$181.97
Median
$229.09
Typical High
$575.44
Anthem BCBS
Setting
Professional
Modifier
Global
Typical Low
$263.03
Median
$371.54
Typical High
$371.54
Blue Shield
Setting
Facility
Modifier
Global
Typical Low
$331.13
Median
$616.60
Typical High
$776.25
Blue Shield
Setting
Professional
Modifier
Global
Typical Low
$100.00
Median
$100.00
Typical High
$380.19
Cigna
Setting
Professional
Modifier
Global
Typical Low
$162.18
Median
$162.18
Typical High
$162.18
Kaiser Permanente
Setting
Professional
Modifier
Global
Typical Low
$128.82
Median
$346.74
Typical High
$407.38
Lucent Health
Setting
Facility
Modifier
Global
Typical Low
$1,548.82
Median
$1,548.82
Typical High
$1,548.82
Lucent Health
Setting
Professional
Modifier
Global
Typical Low
$1,445.44
Median
$2,344.23
Typical High
$2,344.23
Providence
Setting
Facility
Modifier
Global
Typical Low
$181.97
Median
$281.84
Typical High
$478.63
Providence
Setting
Professional
Modifier
Global
Typical Low
$162.18
Median
$162.18
Typical High
$263.03
United
Setting
Facility
Modifier
Global
Typical Low
$41.69
Median
$41.69
Typical High
$41.69
United
Setting
Professional
Modifier
Global
Typical Low
$107.15
Median
$144.54
Typical High
$281.84

Where California 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.

California· 17th of 51

$209

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.