Phosphorus test cost in Urban Honolulu, HI
In Urban Honolulu, HI, 8 hospitals list a cash price for phosphorus (phosphate) blood test: from $28.20 to $50.25, with a median of $45.95. The lowest listed price is at Pali Momi Medical Center and 2 other hospitals — $17.75 less than the median here. Across Hawaii, the median is $47.60 at 11 hospitals.
Cash prices at 8 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 Feb 12, 2026 and Feb 12, 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 Urban Honolulu, HI.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Pali Momi Medical Center lowest Aiea, HI · (808) 486-6000 PHOSPHORUS, FLUID | $28.20 | $47.00 | $4.65–$12.03 | 40% | Feb 12, 2026 source file |
| Kapiolani Medical Center for Women & Children lowest Honolulu, HI · (808) 983-6000 PHOSPHORUS, FLUID | $28.20 | $47.00 | $4.65–$12.03 | 40% | Feb 12, 2026 source file |
| Straub Clinic & Hospital lowest Honolulu, HI · (808) 522-4000 PHOSPHORUS, FLUID | $28.20 | $47.00 | $4.65–$12.03 | 40% | Feb 12, 2026 source file |
| Pali Momi Medical Center Aiea, HI · (808) 486-6000 PHOSPHORUS BLOOD | $31.20 | $52.00 | $4.65–$5.21 | 40% | Feb 12, 2026 source file |
| Straub Clinic & Hospital Honolulu, HI · (808) 522-4000 PHOSPHORUS BLOOD | $31.20 | $52.00 | $4.65–$12.03 | 40% | Feb 12, 2026 source file |
| Kapiolani Medical Center for Women & Children Honolulu, HI · (808) 983-6000 PHOSPHORUS BLOOD | $31.20 | $52.00 | $4.65–$5.21 | 40% | Feb 12, 2026 source file |
| Shriners Childrens - Honolulu Honolulu, HI · (808) 941-4466 ASSAY OF PHOSPHORUS | $44.30 | $44.30 | $3.32–$7.11 | — | — source file |
| The Queens Medical Center - Wahiawa Wahiawa, HI · (808) 538-9011 PHOSPHATE LEVEL | $47.60 | $68.00 | $6.89–$257.71 | 30% | — source file |
| Queens Medical Center - West Oahu Ewa Beach, HI · (808) 538-9011 PHOSPHATE LEVEL | $47.60 | $68.00 | $4.74–$257.71 | 30% | — source file |
| The Queens Medical Center Honolulu, HI · (808) 538-9011 PHOSPHATE LEVEL | $47.60 | $68.00 | $4.74–$19.68 | 30% | — source file |
| Kaiser Foundation Hospital - Moanalua Honolulu, HI · (808) 432-0000 ASSAY OF PHOSPHORUS INORGANIC | $50.25 | $67.00 | $5.00–$23.00 | 25% | — source file |
Outpatient: lowest $28.20, median $45.95, highest $50.25 — a 1.8× difference within the same market.
As an inpatient, the same code is billed by 4 facilities here, median $28.20. 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 2 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.