Phosphorus test cost in Bakersfield, CA
In Bakersfield-Delano, CA, 5 hospitals list a cash price for phosphorus (phosphate) blood test: from $18.35 to $67.62, with a median of $31.88. The lowest listed price is at Bakersfield Memorial Hospital — $13.53 less than the median here. Across California, the median is $75.60 at 198 hospitals.
Cash prices at 5 facilities across 3 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 28, 2026 and Sep 11, 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 Bakersfield-Delano, CA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Bakersfield Memorial Hospital lowest Bakersfield, CA · (661) 327-1792 PHOSPHORUS | $18.35 | $50.00 | $4.74–$50.00 | 63% | Feb 28, 2026 source file |
| Mercy Hospital Bakersfield, CA · (661) 632-5000 PHOSPHORUS | $18.55 | $50.00 | $4.74–$50.00 | 63% | Feb 28, 2026 source file |
| Ridgecrest Regional Hospital Ridgecrest, CA · (760) 446-3551 Assay of phosphorus | $31.88 | $60.15 | — | 47% | Sep 11, 2026 source file |
| Ridgecrest Regional Hospital Ridgecrest, CA · (760) 446-3551 Phosphorus | $31.88 | $60.15 | — | 47% | Sep 11, 2026 source file |
| Good Samaritan Hospital Bakersfield, CA · (661) 215-7500 PHOSPHATE LEVEL | $40.95 | $58.50 | $4.21–$126.00 | 30% | — source file |
| Kern Valley Healthcare District Mountain Mesa, CA · (760) 379-2681 Phosphate level | $67.62 | $322.00 | $5.44–$322.00 | 79% | Jun 11, 2026 source file |
Outpatient: lowest $18.35, median $31.88, highest $67.62 — a 3.7× difference within the same market.
As an inpatient, the same code is billed by 3 facilities here, median $65.70. 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 4 of 4 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.
2 rows held back from this comparison
They are 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.
| Bakersfield Memorial Hospital Bakersfield, CARL-A-PHOS 20028 | $2.38 | file |
| Mercy Hospital Bakersfield, CARL-A-PHOS 20028 | $2.41 | file |