Lab tests CPT 84100 Outpatient

Phosphorus test cost in Boulder, CO

In Boulder, CO, 1 hospital lists a cash price for phosphorus (phosphate) blood test: from $123.64 to $123.64, with a median of $123.64. Across Colorado, the median is $87.50 at 46 hospitals.

Cash prices at 1 facility for code 84100, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Apr 1, 2026 and Apr 1, 2026.

Lowest$123.64AdventHealth Avista

Median$123.64half of hospitals charge less

Highest$123.64in this market

Difference1.0×highest vs lowest

Where each hospital's price falls

Each dot is one hospital's cash price on a scale from the lowest to the highest in Boulder, CO.

median

Lowest $123.64Highest $123.64

Hospitals, cheapest first

Hospital	Cash price	List price	Insurers pay	Off list
AdventHealth Avista lowest Louisville, CO · (303) 673-1000 HC PHOSPHORUS BODY FLUID+1 more line at this price File of Apr 1, 2026 · source file	$123.64	$123.64	—	—

Hospital The hospital that published the price, its city and the line exactly as written in its price file.

Cash price The hospital's own price for a patient paying without insurance (“discounted cash” in its price file). Hospitals must publish it under federal law, 45 CFR 180.50. Call to confirm it before booking. More

List price The hospital's full chargemaster price (“gross charge”) before any discount. Almost nobody pays it; the gap to the cash price shows what the self-pay discount is worth. More

Insurers pay The lowest and highest rates this hospital has agreed with insurance plans for the same item, from its price file. If the cash price is below what your plan pays and you have not met your deductible, paying cash can cost you less. More

Off list How much lower the cash price is than the list price.

No cash discount This line's cash price equals the hospital's full list price. Many hospitals still reduce bills for uninsured patients: ask the billing office for its self-pay discount in writing. More

Outpatient: lowest $123.64, median $123.64, highest $123.64.

As an inpatient, the same code is billed by 1 facility here, median $123.64. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.

What it is

A phosphorus test measures phosphate in the blood. It is used with calcium for kidney disease, bone disease and parathyroid problems.

What the price covers

The price usually covers running the test. The blood draw (36415) is often billed as a separate line.