go back

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 October 2026.

How much does Adjunctive Nonimplanted Continuous Glucose Monitor Supplies cost?

$162

Typical negotiated rate. In California, October 2026.

Insurers have agreed to pay about $162 for this service. The price depends on where it is billed: about $162 from a physician practice, and about $224 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 8 insurance carriers under federal price transparency rules.

Prices by location type

Billed byTypicalRange
Physician practiceA doctor's office, clinic or independent provider$162$145 to $380
FacilityA hospital or hospital-owned outpatient department$224$182 to $331

How much rates vary

Facilitymedian $224 · 10th to 90th $158 to $724Professionalmedian $162 · 10th to 90th $141 to $2,399
$100$200$500$1K$2Kfacility $224professional $162

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
$141.25
Median
$151.36
Typical High
$151.36
Aetna
Setting
Professional
Modifier
None
Typical Low
$134.90
Median
$141.25
Typical High
$169.82
Anthem BCBS
Setting
Facility
Modifier
None
Typical Low
$177.83
Median
$223.87
Typical High
$933.25
Anthem BCBS
Setting
Professional
Modifier
None
Typical Low
$263.03
Median
$371.54
Typical High
$398.11
Anthem BCBS
Setting
Professional
Modifier
RR · Rental
Typical Low
$239.88
Median
$239.88
Typical High
$239.88
Anthem BCBS
Setting
Professional
Modifier
UE · Used equipment
Typical Low
$181.97
Median
$181.97
Typical High
$181.97
Blue Shield
Setting
Facility
Modifier
None
Typical Low
$190.55
Median
$616.60
Typical High
$776.25
Blue Shield
Setting
Professional
Modifier
None
Typical Low
$100.00
Median
$295.12
Typical High
$380.19
Cigna
Setting
Professional
Modifier
None
Typical Low
$162.18
Median
$162.18
Typical High
$162.18
Kaiser Permanente
Setting
Professional
Modifier
None
Typical Low
$128.82
Median
$346.74
Typical High
$630.96
Lucent Health
Setting
Professional
Modifier
None
Typical Low
$1,445.44
Median
$1,445.44
Typical High
$2,398.83
Providence
Setting
Facility
Modifier
None
Typical Low
$141.25
Median
$245.47
Typical High
$398.11
Providence
Setting
Professional
Modifier
None
Typical Low
$162.18
Median
$162.18
Typical High
$162.18
United
Setting
Professional
Modifier
None
Typical Low
$144.54
Median
$144.54
Typical High
$338.84
3 more rates with less common billing modifiers

A modifier changes what was billed, for example a reduced or repeated service. Each of these modifiers carries under 10% of the published rates for this code. Modifier combinations, and modifiers with fewer than 30 rates for a carrier, are not listed.

Insurance Carrier
Anthem BCBS
Setting
Professional
Modifier
KF · Class III device
Typical Low
$269.15
Median
$363.08
Typical High
$407.38
Kaiser Permanente
Setting
Professional
Modifier
KF · Class III device
Typical Low
$251.19
Median
$323.59
Typical High
$741.31
Providence
Setting
Professional
Modifier
KF · Class III device
Typical Low
$263.03
Median
$288.40
Typical High
$478.63

Where California 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.

California· 39th of 51

$162

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.