Lab tests CPT 84100 Inpatient — admitted to hospital

Phosphorus test cost in Charleston, SC — inpatient

In Charleston-North Charleston, SC, 5 hospitals list a cash price for phosphorus (phosphate) blood test as an inpatient: from $21.50 to $53.95, with a median of $53.95. The lowest listed price is at MUSC Medical Center — $32.45 less than the median here. Across South Carolina, the median is $48.28 at 38 hospitals.

Cash prices at 5 facilities across 3 cities for code 84100, as an inpatient (admitted to hospital) . Collected Sep 28, 2026; the hospital files themselves were last updated between Apr 1, 2026 and Apr 1, 2026.

Lowest$21.50MUSC Medical Center

Median$53.95half of hospitals charge less

Highest$53.95in this market

Difference2.5×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 Charleston-North Charleston, SC.

median

Lowest $21.50Highest $53.95

Hospitals, cheapest first

Hospital	Cash price	List price	Insurers pay	Off list
MUSC Medical Center lowest Charleston, SC · (843) 792-2300 HB EFPO PHOSPHORUS MA (SEND OUT) File of Apr 1, 2026 · source file	$21.50	$43.00	—	50%
MUSC Medical Center Charleston, SC · (843) 792-2300 HB PHOSPHOROUS File of Apr 1, 2026 · source file	$33.00	$66.00	—	50%
Roper Hospital Charleston, SC · (843) 724-2800 HC Assay of Phosphorus Inorganic source file	$53.95	$83.00	—	35%
Roper St Francis Mount Pleasant Hospital Mount Pleasant, SC · (843) 724-2954 HC Assay of Phosphorus Inorganic source file	$53.95	$83.00	—	35%
Roper St Francis Hospital Berkeley Summerville, SC · (854) 529-3002 HC Assay of Phosphorus Inorganic source file	$53.95	$83.00	—	35%
Bon Secours St Francis Xavier Hospital Charleston, SC · (843) 402-1006 HC Assay of Phosphorus Inorganic source file	$53.95	$83.00	—	35%

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.

Inpatient: lowest $21.50, median $53.95, highest $53.95 — a 2.5× difference within the same market.

As an outpatient, the same code is billed by 8 facilities here, median $48.48 — that is the price to compare if you are not being admitted.

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.