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Blood Phosphorus (Phosphate) Test

Maryland rates for HCPCS 84100

Measures the amount of phosphate, a mineral the body uses for bone strength, energy production and cell function, in a blood sample. Levels drift when the kidneys are not clearing phosphate properly, when the parathyroid glands are over- or under-active, or when vitamin D is out of balance, so it is usually read alongside calcium. Measuring phosphate in a urine sample is a separate test.

Rates data updated July 2026.

How much does Blood Phosphorus (Phosphate) Test cost?

$5.50

Typical negotiated rate. In Maryland, July 2026.

Insurers have agreed to pay about $5.50 for this service. The price depends on where it is billed: about $4.27 from a physician practice, and about $6.31 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 6 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$4.27$3.55 to $5.25
FacilityA hospital or hospital-owned outpatient department$6.31$5.37 to $7.94

How much rates vary

Facilitymedian $6 · 10th to 90th $4 to $16Professionalmedian $4 · 10th to 90th $3 to $7
$2.0$10.0$50.0$200.0$1.0Kfacility $6professional $4

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
$4.37
Median
$6.31
Typical High
$16.22
Aetna
Setting
Professional
Modifier
Global
Typical Low
$3.24
Median
$4.27
Typical High
$6.61
CareFirst
Setting
Professional
Modifier
Global
Typical Low
$1.66
Median
$3.80
Typical High
$4.68
Cigna
Setting
Facility
Modifier
Global
Typical Low
$2.51
Median
$3.31
Typical High
$6.17
Cigna
Setting
Professional
Modifier
Global
Typical Low
$2.63
Median
$4.79
Typical High
$11.22
Kaiser Permanente
Setting
Professional
Modifier
Global
Typical Low
$4.79
Median
$5.75
Typical High
$8.91
United
Setting
Facility
Modifier
Global
Typical Low
$2.00
Median
$2.09
Typical High
$10.47
United
Setting
Professional
Modifier
Global
Typical Low
$2.14
Median
$2.75
Typical High
$4.47
Wellpoint
Setting
Professional
Modifier
Global
Typical Low
$1.86
Median
$3.24
Typical High
$7.08

Where Maryland sits

The same service costs 9.8 times more in West Virginia than in New Mexico. Every bar is a state, most expensive first. Pick one to see its carriers and full range.

Maryland $5.50 · 42nd of 51
WV $43.65NM $4.47

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.