Lab tests CPT 84100 District of Columbia Outpatient

Phosphorus test cost in District of Columbia

In District of Columbia, 5 hospitals publish a cash price for phosphorus (phosphate) blood test: from $30.50 to $72.50, with a median of $56.88. The lowest price is at National Rehabilitation Hospital (Washington). The highest price is 2.4× the lowest.

Outpatient cash prices, one line per hospital — its lowest listed price for code 84100. Prices for both sides of the body and inpatient prices are not mixed in. Collected Sep 29, 2026. See them on a map

Lowest$30.50National Rehabilitation Hospital

Median$56.88half of hospitals charge less

Highest$72.50in District of Columbia

Lowest saves$26.38vs the median

Hospitals in District of Columbia, cheapest first

Hospital	Cash price	List price	File date
National Rehabilitation Hospital lowest Washington · Washington-Arlington-Alexandria, DC-VA-MD-WV PHOSPHORUS INORGANIC PHOSPHAT	$30.50	$46.92	Apr 1, 2026 source file
Children's National Rehabilitation and Specialized Care Washington · Washington-Arlington-Alexandria, DC-VA-MD-WV PHOSPHORUS	$33.00	$66.00	— source file
MedStar Georgetown Hospital Northwest Washington · Washington-Arlington-Alexandria, DC-VA-MD-WV PHOSPHORUS INORGANIC PHOSPHAT	$56.88	$87.51	Apr 1, 2026 source file
MedStar Washington Hospital Center Washington · Washington-Arlington-Alexandria, DC-VA-MD-WV PHOSPHORUS INORGANIC	$57.79	$88.91	Apr 1, 2026 source file
Children's National Hospital Washington · Washington-Arlington-Alexandria, DC-VA-MD-WV Phosphorus Level	$72.50	$145.00	— source file

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

File date When the hospital last updated its price file, as the file says itself. A dash means the file gives no date.

By metro area

Each metro page compares every listing, including prices for both sides of the body.

Metro area	Hospitals	Lowest	Median
Washington-Arlington-Alexandria, DC-VA-MD-WV	5	$30.50	$56.88

Market A metro area (as the Census Bureau defines it) or, outside metro areas, a town. Each links to every hospital price there.

Hospitals How many hospitals publish a cash price for this code here. Each hospital counts once, at its lowest outpatient cash price.

Lowest The lowest cash price among those hospitals.

Median The middle cash price: half of the hospitals charge less, half charge more. One price per hospital. More

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.

Phosphorus (phosphate) blood test in other states

Median cash price across the state's hospitals.