Lab tests CPT 84100 Outpatient

Phosphorus test cost in Memphis, TN

In Memphis, TN-MS-AR, 13 hospitals list a cash price for phosphorus (phosphate) blood test: from $5.06 to $64.53, with a median of $30.30. The lowest listed price is at Methodist Lebonheur Childrens Hosp — $25.24 less than the median here. Across Tennessee, the median is $31.17 at 88 hospitals.

Cash prices at 13 facilities across 7 cities for code 84100, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 27, 2026; the hospital files themselves were last updated between Feb 27, 2026 and Feb 28, 2026.

Lowest$5.06Methodist Lebonheur Childrens Hosp
Median$30.30half pay less
Highest$64.53in this market
Difference12.8×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 Memphis, TN-MS-AR.

median
Lowest $5.06Highest $64.53

Hospitals, cheapest first

HospitalCash price List priceInsurers payOff listFile date
Methodist Lebonheur Childrens Hosp lowest Memphis, TN HC Assay of Inorganic Phosphorus - Phosphorus Body Fluid $5.06 $23.00 — 78% —
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Methodist Lebonheur Childrens Hosp Memphis, TN HC Assay of Inorganic Phosphorus - Phosphorus $6.60 $30.00 — 78% —
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Methodist Olive Branch Hospital Olive Branch, MS · (662) 932-9000 HC Assay of Inorganic Phosphorus - Phosphorus $13.20 $60.00 $1.99–$32.70 78% —
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Methodist South Hospital Memphis, TN · (901) 516-8274 HC Assay of Inorganic Phosphorus - Phosphorus $13.20 $60.00 $1.99–$32.70 78% —
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Methodist North Hospital Memphis, TN · (901) 516-8274 HC Assay of Inorganic Phosphorus - Phosphorus $13.20 $60.00 $1.99–$32.70 78% —
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Methodist University Hospital Memphis, TN · (901) 516-8274 HC Assay of Inorganic Phosphorus - Phosphorus $13.20 $60.00 $1.99–$32.70 78% —
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Methodist Le Bonheur Germantown Hospital Germantown, TN · (901) 516-8274 HC Assay of Inorganic Phosphorus - Phosphorus $13.20 $60.00 $1.99–$32.70 78% —
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Baptist Memorial Hospital-Crittenden West Memphis, AR · (870) 394-7800 PHOSPHORUS LEVEL $30.30 $202.00 $4.50–$161.60 85% Feb 27, 2026
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Baptist Memorial Hospital-DeSoto Southaven, MS · (662) 772-4000 PHOSPHORUS LEVEL $40.40 $202.00 $4.50–$181.80 80% Feb 27, 2026
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Baptist Memorial Hospital-Memphis Memphis, TN · (901) 226-5000 PHOSPHORUS LEVEL $42.42 $202.00 $4.50–$181.80 79% Feb 28, 2026
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Baptist Memorial Hospital-Women's Memphis, TN PHOSPHORUS LEVEL $42.42 $202.00 $4.50–$181.80 79% Feb 27, 2026
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Baptist Memorial Hospital-Collierville Collierville, TN · (901) 226-5000 PHOSPHORUS LEVEL $42.42 $202.00 $4.50–$181.80 79% Feb 27, 2026
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Baptist Memorial Hospital-Tipton Covington, TN · (901) 476-2621 PHOSPHORUS LEVEL $48.48 $202.00 $4.12–$181.80 76% Feb 27, 2026
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Regional One Health Memphis, TN · (901) 545-7928 84100781822 - MT Lab Phos-MT (84100) $64.53 $117.75 $4.18–$94.20 45% —
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Regional One Health Memphis, TN · (901) 545-7928 1202560000 - PHOSPHORUS 84100 $64.53 $117.75 $4.18–$94.20 45% —
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Outpatient: lowest $5.06, median $30.30, highest $64.53 — a 12.8× difference within the same market.

As an inpatient, the same code is billed by 12 facilities here, median $21.75. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.

Cash or insurance?

At 12 of 12 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at none is it below every plan's rate. If you have insurance but have not met your deductible, you usually pay your plan's negotiated rate, which falls somewhere in the "Insurers pay" column. Paying cash can cost less, but a cash payment usually does not count toward your deductible. Ask the hospital for both numbers before you book.

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.