Phosphorus test cost in Little Rock, AR
In Little Rock-North Little Rock-Conway, AR, 9 hospitals list a cash price for phosphorus (phosphate) blood test: from $5.50 to $99.23, with a median of $20.53. The lowest listed price is at Conway Regional Medical Center — $15.03 less than the median here. Across Arkansas, the median is $27.33 at 48 hospitals.
Cash prices at 9 facilities across 4 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 Nov 21, 2025 and Jul 2, 2026.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Little Rock-North Little Rock-Conway, AR.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Conway Regional Medical Center lowest Conway, AR · (501) 329-3831 ASSAY OF PHOSPHORUS | $5.50 | $25.00 | $4.74–$25.00 | 78% | Jul 2, 2026 source file |
| Baptist Health Medical Center - Conway Conway, AR · (501) 585-2000 84100 - ASSAY OF PHOSPHORUS INORGANIC | $11.44 | $45.76 | $4.74–$10.35 | 75% | — source file |
| Baptist Health Medical Center - North Little Rock North Little Rock, AR · (501) 202-3000 84100 - ASSAY OF PHOSPHORUS INORGANIC | $11.44 | $45.76 | $4.74–$10.35 | 75% | — source file |
| St. Vincent Infirmary Medical Center Sherwood, AR · (501) 552-7100 PHOSPHORUS | $20.34 | $80.00 | $3.57–$44.00 | 75% | Feb 28, 2026 source file |
| CHI St. Vincent Infirmary Little Rock, AR · (501) 552-3000 PHOSPHORUS | $20.53 | $80.00 | $3.57–$44.00 | 74% | Feb 28, 2026 source file |
| Conway Regional Medical Center Conway, AR · (501) 329-3831 PHOSPHOROUS SERUM | $25.10 | $114.11 | $4.74–$114.11 | 78% | Jul 2, 2026 source file |
| Conway Regional Medical Center Conway, AR · (501) 329-3831 PHOSPHOROUS F | $25.10 | $114.11 | $4.74–$114.11 | 78% | Jul 2, 2026 source file |
| University of Arkansas for Medical Sciences Little Rock, AR · (501) 686-5000 PHOSPHATE LEVEL | $26.40 | $44.00 | $4.60–$887.00 | 40% | — source file |
| University of Arkansas for Medical Sciences Little Rock, AR · (501) 686-5000 ASSAY OF PHOSPHORUS | $28.80 | $48.00 | $4.60–$887.00 | 40% | — source file |
| Arkansas Heart Hospital Little Rock, AR · (501) 219-7000 Phosphorus Level | $29.60 | $37.00 | $21.59–$159.00 | 20% | Nov 21, 2025 source file |
| Arkansas Childrens Hospital Little Rock, AR · (501) 364-1100 PHOSPHATE LEVEL | $57.44 | $63.82 | $4.74–$40.07 | 10% | — source file |
| Arkansas Childrens Hospital Little Rock, AR · (501) 364-1100 ASSAY OF PHOSPHORUS | $68.76 | $76.40 | $4.74–$40.07 | 10% | — source file |
| Conway Regional Rehabilitation Hospital Conway, AR PHOSPHOROUS SERUM | $99.23 | $99.23 | — | — | — source file |
Outpatient: lowest $5.50, median $20.53, highest $99.23 — a 18.0× difference within the same market.
As an inpatient, the same code is billed by 4 facilities here, median $20.44. 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 5 of 8 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.
1 row held back from this comparison
It is priced below $1 or below a tenth of the national median for code 84100 ($42.37). Such a line is almost always a physician's fee billed separately, an assistant's share or a placeholder — a real charge, but not the price of the procedure itself.
| Baptist Health Medical Center - Little Rock Little Rock, AR84100 - ASSAY OF PHOSPHORUS INORGANIC | $4.18 | file |