Magnesium test cost in Tampa, FL
In Tampa-St. Petersburg-Clearwater, FL, 33 hospitals list a cash price for magnesium blood test: from $4.00 to $879.67, with a median of $6.00. The lowest listed price is at HCA Florida Oak Hill Hospital — $2.00 less than the median here. Across Florida, the median is $13.25 at 171 hospitals.
- The median here, $6.00, is 86% below the US median of $41.60.
- That is 0.9× Medicare's 2026 national rate for the same service ($6.70).
- Tampa, FL has the lowest median of 4 metro areas in Florida with at least 10 hospitals pricing this code.
- 20 of 33 hospitals list a cash price equal to their full list price, with no self-pay discount.
Cash prices at 33 facilities across 21 cities for code 83735, as an outpatient — the setting a self-pay patient normally buys. Collected Nov 5, 2026; the hospital files themselves were last updated between Jan 1, 2026 and Sep 1, 2026.
Lowest$4.00HCA Florida Oak Hill Hospital
Median$6.00half of hospitals charge less
Highest$879.67in this market
Difference219.9×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 Tampa-St. Petersburg-Clearwater, FL.
median
Lowest $4.00Highest $1,465.74
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| HCA Florida Oak Hill Hospital lowest Brooksville, FL · (352) 596-6632 MAGNESIUM URINE File of Sep 1, 2026 · source file | $4.00 | $4.00 | $0.19–$3.68 | — |
| HCA Florida Brandon Hospital Brandon, FL · (813) 916-0600 MAGNESIUM URINE File of Sep 1, 2026 · source file | $4.36 | $4.36 | $0.20–$4.01 | — |
| HCA Florida Trinity Hospital Tampa, FL · (727) 834-4900 MAGNESIUM RBC File of Sep 1, 2026 · source file | $5.00 | $5.00 | $0.23–$4.60 | — |
| HCA Florida Oak Hill Hospital Brooksville, FL · (352) 596-6632 MAGNESIUM RBC File of Sep 1, 2026 · source file | $5.00 | $5.00 | $0.23–$4.60 | — |
| HCA Florida Pasadena Hospital South Pasadena, FL · (727) 381-1000 MAGNESIUM RBC File of Sep 1, 2026 · source file | $5.00 | $5.00 | $0.23–$4.60 | — |
| HCA Florida St. Petersburg Hospital St. Petersburg, FL · (727) 384-1414 MAGNESIUM RBC File of Sep 1, 2026 · source file | $5.00 | $5.00 | $0.23–$4.60 | — |
| Tampa General Hospital Tampa, FL · (813) 844-7000 Hb Magnesium 24Hr Urine File of Apr 1, 2026 · source file | $5.47 | $15.64 | — | 65% |
| Orlando Health Wiregrass Ranch Hospital Wesley Chapel, FL Hb Assay Of Magnesium - Magnesium Urine+2 more lines at this price File of Apr 1, 2026 · source file | $5.60 | $14.00 | — | 60% |
| Orlando Health Bayfront Hospital Saint Petersburg, FL · (727) 823-1234 Hb Assay Of Magnesium - Magnesium+2 more lines at this price File of Apr 1, 2026 · source file | $5.60 | $14.00 | — | 60% |
| Orlando Health Bayfront Hospital Saint Petersburg, FL · (727) 823-1234 Hb Assay Of Magnesium-Ref+1 more line at this price File of Apr 1, 2026 · source file | $6.00 | $15.00 | — | 60% |
| South Florida Baptist Hospital Plant City, FL · (813) 757-1200 UR STN RSK-MAG UR File of Jan 1, 2026 · source file | $6.00 | $10.00 | $1.80–$10.00 | 40% |
| Orlando Health Wiregrass Ranch Hospital Wesley Chapel, FL Hb Assay Of Magnesium-Ref+1 more line at this price File of Apr 1, 2026 · source file | $6.00 | $15.00 | — | 60% |
| Mease Countryside Hospital Safety Harbor, FL · (727) 734-6950 UR STN RSK-MAG UR File of Jan 1, 2026 · source file | $6.00 | $10.00 | $1.80–$10.00 | 40% |
| BayCare Hospital Wesley Chapel Wesley Chapel, FL · (813) 914-1000 UR STN RSK-MAG UR File of Jan 1, 2026 · source file | $6.00 | $10.00 | $1.80–$10.00 | 40% |
| St Anthony's Hospital St. Petersburg, FL · (727) 825-1100 UR STN RSK-MAG UR File of Jan 1, 2026 · source file | $6.00 | $10.00 | $1.80–$10.00 | 40% |
| BayCare Alliant Hospital Dunedin, FL · (727) 733-1111 UR STN RSK-MAG UR File of Jan 1, 2026 · source file | $6.00 | $10.00 | $5.00–$10.00 | 40% |
| St. Joseph's Hospital Tampa, FL · (813) 870-4398 UR STN RSK-MAG UR File of Jan 1, 2026 · source file | $6.00 | $10.00 | $1.80–$10.00 | 40% |
| Morton Plant NorthBay Hospital New Port Richey, FL · (727) 842-8468 UR STN RSK-MAG UR File of Jan 1, 2026 · source file | $6.00 | $10.00 | $1.80–$10.00 | 40% |
| Mease Dunedin Hospital Dunedin, FL · (727) 733-1111 UR STN RSK-MAG UR File of Jan 1, 2026 · source file | $6.00 | $10.00 | $1.80–$10.00 | 40% |
| Morton Plant Hospital Clearwater, FL · (727) 462-7000 UR STN RSK-MAG UR File of Jan 1, 2026 · source file | $6.00 | $10.00 | $1.80–$10.00 | 40% |
| Tampa General Hospital Tampa, FL · (813) 844-7000 Hb Magnesium Poc File of Apr 1, 2026 · source file | $7.35 | $21.00 | — | 65% |
| HCA Florida Brandon Hospital Brandon, FL · (813) 916-0600 MAGNESIUM BLD File of Sep 1, 2026 · source file | $7.60 | $7.60 | $0.36–$6.99 | — |
| BayCare Alliant Hospital Dunedin, FL · (727) 733-1111 MAGNESIUM LEVEL File of Jan 1, 2026 · source file | $16.20 | $27.00 | $13.50–$27.00 | 40% |
| St Anthony's Hospital St. Petersburg, FL · (727) 825-1100 MAGNESIUM LEVEL File of Jan 1, 2026 · source file | $16.20 | $27.00 | $4.86–$27.00 | 40% |
| BayCare Hospital Wesley Chapel Wesley Chapel, FL · (813) 914-1000 MAGNESIUM LEVEL File of Jan 1, 2026 · source file | $16.20 | $27.00 | $4.86–$27.00 | 40% |
| Mease Countryside Hospital Safety Harbor, FL · (727) 734-6950 MAGNESIUM LEVEL File of Jan 1, 2026 · source file | $16.20 | $27.00 | $4.86–$27.00 | 40% |
| Morton Plant Hospital Clearwater, FL · (727) 462-7000 MAGNESIUM LEVEL File of Jan 1, 2026 · source file | $16.20 | $27.00 | $4.86–$27.00 | 40% |
| Mease Dunedin Hospital Dunedin, FL · (727) 733-1111 MAGNESIUM LEVEL File of Jan 1, 2026 · source file | $16.20 | $27.00 | $4.86–$27.00 | 40% |
| Morton Plant NorthBay Hospital New Port Richey, FL · (727) 842-8468 MAGNESIUM LEVEL File of Jan 1, 2026 · source file | $16.20 | $27.00 | $4.86–$27.00 | 40% |
| South Florida Baptist Hospital Plant City, FL · (813) 757-1200 MAGNESIUM LEVEL File of Jan 1, 2026 · source file | $16.20 | $27.00 | $4.86–$27.00 | 40% |
| St. Joseph's Hospital Tampa, FL · (813) 870-4398 MAGNESIUM LEVEL File of Jan 1, 2026 · source file | $16.20 | $27.00 | $4.86–$27.00 | 40% |
| Morton Plant NorthBay Hospital New Port Richey, FL · (727) 842-8468 UR MAGNESIUM LEVEL 24 HOUR+2 more lines at this price File of Jan 1, 2026 · source file | $16.80 | $28.00 | $5.04–$28.00 | 40% |
| Mease Countryside Hospital Safety Harbor, FL · (727) 734-6950 UR MAGNESIUM LEVEL+2 more lines at this price File of Jan 1, 2026 · source file | $16.80 | $28.00 | $5.04–$28.00 | 40% |
| BayCare Hospital Wesley Chapel Wesley Chapel, FL · (813) 914-1000 UR MAGNESIUM LEVEL+2 more lines at this price File of Jan 1, 2026 · source file | $16.80 | $28.00 | $5.04–$28.00 | 40% |
| Morton Plant Hospital Clearwater, FL · (727) 462-7000 UR MAGNESIUM LEVEL 24 HOUR+2 more lines at this price File of Jan 1, 2026 · source file | $16.80 | $28.00 | $5.04–$28.00 | 40% |
| St Anthony's Hospital St. Petersburg, FL · (727) 825-1100 UR MAGNESIUM LEVEL 24 HOUR+2 more lines at this price File of Jan 1, 2026 · source file | $16.80 | $28.00 | $5.04–$28.00 | 40% |
| South Florida Baptist Hospital Plant City, FL · (813) 757-1200 UR MAGNESIUM LEVEL 24 HOUR+2 more lines at this price File of Jan 1, 2026 · source file | $16.80 | $28.00 | $5.04–$28.00 | 40% |
| Mease Dunedin Hospital Dunedin, FL · (727) 733-1111 UR MAGNESIUM LEVEL 24 HOUR+2 more lines at this price File of Jan 1, 2026 · source file | $16.80 | $28.00 | $5.04–$28.00 | 40% |
| BayCare Alliant Hospital Dunedin, FL · (727) 733-1111 BF MAGNESIUM+2 more lines at this price File of Jan 1, 2026 · source file | $16.80 | $28.00 | $14.00–$28.00 | 40% |
| St. Joseph's Hospital Tampa, FL · (813) 870-4398 BF MAGNESIUM+2 more lines at this price File of Jan 1, 2026 · source file | $16.80 | $28.00 | $5.04–$28.00 | 40% |
| Morton Plant NorthBay Hospital New Port Richey, FL · (727) 842-8468 MAGNESIUM, RBC,INTRACELLULAR File of Jan 1, 2026 · source file | $18.60 | $31.00 | $5.58–$31.00 | 40% |
| South Florida Baptist Hospital Plant City, FL · (813) 757-1200 MAGNESIUM, RBC,INTRACELLULAR File of Jan 1, 2026 · source file | $18.60 | $31.00 | $5.58–$31.00 | 40% |
| Mease Countryside Hospital Safety Harbor, FL · (727) 734-6950 MAGNESIUM, RBC,INTRACELLULAR File of Jan 1, 2026 · source file | $18.60 | $31.00 | $5.58–$31.00 | 40% |
| BayCare Alliant Hospital Dunedin, FL · (727) 733-1111 MAGNESIUM, RBC,INTRACELLULAR File of Jan 1, 2026 · source file | $18.60 | $31.00 | $15.50–$31.00 | 40% |
| St. Joseph's Hospital Tampa, FL · (813) 870-4398 MAGNESIUM, RBC,INTRACELLULAR File of Jan 1, 2026 · source file | $18.60 | $31.00 | $5.58–$31.00 | 40% |
| BayCare Hospital Wesley Chapel Wesley Chapel, FL · (813) 914-1000 MAGNESIUM, RBC,INTRACELLULAR File of Jan 1, 2026 · source file | $18.60 | $31.00 | $5.58–$31.00 | 40% |
| Morton Plant Hospital Clearwater, FL · (727) 462-7000 MAGNESIUM, RBC,INTRACELLULAR File of Jan 1, 2026 · source file | $18.60 | $31.00 | $5.58–$31.00 | 40% |
| Mease Dunedin Hospital Dunedin, FL · (727) 733-1111 MAGNESIUM, RBC,INTRACELLULAR File of Jan 1, 2026 · source file | $18.60 | $31.00 | $5.58–$31.00 | 40% |
| St Anthony's Hospital St. Petersburg, FL · (727) 825-1100 MAGNESIUM, RBC,INTRACELLULAR File of Jan 1, 2026 · source file | $18.60 | $31.00 | $5.58–$31.00 | 40% |
| HCA Florida Northside Hospital St Petersburg, FL · (727) 521-5121 MAGNESIUM URINE File of Sep 1, 2026 · source file | $20.50 | $20.50 | $0.96–$18.86 | — |
| Orlando Health Bayfront Hospital Saint Petersburg, FL · (727) 823-1234 Hb Magnesium, Stool-Ref File of Apr 1, 2026 · source file | $21.20 | $53.00 | — | 60% |
| Orlando Health Wiregrass Ranch Hospital Wesley Chapel, FL Hb Magnesium, Stool-Ref File of Apr 1, 2026 · source file | $21.20 | $53.00 | — | 60% |
| Tampa General Hospital Tampa, FL · (813) 844-7000 Hb Rbc Magnesium File of Apr 1, 2026 · source file | $23.10 | $66.00 | — | 65% |
| HCA Florida Bayonet Point Hospital Hudson, FL · (727) 819-2929 MAGNESIUM URINE File of Sep 1, 2026 · source file | $26.88 | $26.88 | $1.26–$24.73 | — |
| Orlando Health Bayfront Hospital Saint Petersburg, FL · (727) 823-1234 Hb Magnesium,Rbc-Ref File of Apr 1, 2026 · source file | $42.40 | $106.00 | — | 60% |
| Orlando Health Wiregrass Ranch Hospital Wesley Chapel, FL Hb Magnesium,Rbc-Ref File of Apr 1, 2026 · source file | $42.40 | $106.00 | — | 60% |
| Orlando Health Wiregrass Ranch Hospital Wesley Chapel, FL Hb Magnesium,Rbc-Arup-Ref File of Apr 1, 2026 · source file | $50.00 | $125.00 | — | 60% |
| Orlando Health Bayfront Hospital Saint Petersburg, FL · (727) 823-1234 Hb Magnesium,Rbc-Arup-Ref File of Apr 1, 2026 · source file | $50.00 | $125.00 | — | 60% |
| H. Lee Moffitt Cancer Center and Research Institute Hospital Tampa, FL MAGNESIUM LEVEL, OUTSIDE FACILITY+2 more lines at this price File of Jul 10, 2026 · source file | $107.00 | $214.00 | $40.45–$214.00 | 50% |
| Tampa General Hospital Tampa, FL · (813) 844-7000 Hb Magnesium File of Apr 1, 2026 · source file | $115.85 | $331.00 | — | 65% |
| Tampa General Hospital Tampa, FL · (813) 844-7000 Hb Ionized Magnesium File of Apr 1, 2026 · source file | $128.10 | $366.00 | — | 65% |
| AdventHealth North Pinellas Tarpon Springs, FL · (813) 615-7219 HC MAGNESIUM SUPERSATURATION PROFILE, URINE - ARUP+1 more line at this price File of Apr 1, 2026 · source file | $149.45 | $149.45 | — | — |
| HCA Florida Northside Hospital St Petersburg, FL · (727) 521-5121 MAGNESIUM OTHER File of Sep 1, 2026 · source file | $160.60 | $160.60 | $7.55–$147.75 | — |
| AdventHealth Connerton Land O Lakes, FL HC ASSAY OF MAGNESIUM - MAGNESIUM RBC+1 more line at this price File of Apr 1, 2026 · source file | $183.40 | $183.40 | — | — |
| HCA Florida Largo Hospital Clearwater, FL · (727) 588-5200 MAGNESIUM URINE File of Sep 1, 2026 · source file | $204.22 | $204.22 | $9.60–$187.88 | — |
| HCA Florida Largo West Hospital Largo, FL · (727) 588-5200 MAGNESIUM URINE File of Sep 1, 2026 · source file | $204.22 | $204.22 | $9.60–$187.88 | — |
| AdventHealth Tampa Tampa, FL · (813) 615-7200 HC MAGNESIUM LEVEL+9 more lines at this price File of Apr 1, 2026 · source file | $230.83 | $230.83 | — | — |
| AdventHealth Wesley Chapel Wesley Chapel, FL · (813) 929-5000 HC MAGNESIUM LEVEL+9 more lines at this price File of Apr 1, 2026 · source file | $230.83 | $230.83 | — | — |
| AdventHealth Zephyrhills Zephyrhills, FL · (813) 615-7219 HC MAGNESIUM LEVEL+9 more lines at this price File of Apr 1, 2026 · source file | $230.83 | $230.83 | — | — |
| AdventHealth Carrollwood Tampa, FL · (813) 615-7219 HC MAGNESIUM LEVEL+10 more lines at this price File of Apr 1, 2026 · source file | $230.83 | $230.83 | — | — |
| AdventHealth Riverview Riverview, FL · (813) 929-5962 HC MAGNESIUM LEVEL+9 more lines at this price File of Apr 1, 2026 · source file | $230.83 | $230.83 | — | — |
| HCA Florida West Tampa Hospital Tampa, FL · (813) 873-6400 MAGNESIUM URINE+1 more line at this price File of Sep 1, 2026 · source file | $237.18 | $237.18 | $11.15–$218.21 | — |
| HCA Florida South Tampa Hospital Tampa, FL · (813) 873-6400 MAGNESIUM BLD+1 more line at this price File of Sep 1, 2026 · source file | $237.18 | $237.18 | $11.15–$218.21 | — |
| AdventHealth Dade City Dade City, FL · (352) 568-1100 HC MAGNESIUM TIMED URINE+2 more lines at this price File of Apr 1, 2026 · source file | $330.35 | $330.35 | — | — |
| HCA Florida Oak Hill Hospital Brooksville, FL · (352) 596-6632 MAGNESIUM BLD File of Sep 1, 2026 · source file | $550.40 | $550.40 | $25.87–$506.37 | — |
| HCA Florida Trinity Hospital Tampa, FL · (727) 834-4900 MAGNESIUM BLD File of Sep 1, 2026 · source file | $651.01 | $651.01 | $30.60–$598.93 | — |
| HCA Florida South Shore Hospital Apollo Beach, FL · (813) 634-3301 MAGNESIUM URINE File of Sep 1, 2026 · source file | $879.67 | $879.67 | $41.34–$809.30 | — |
| HCA Florida Bayonet Point Hospital Hudson, FL · (727) 819-2929 MAGNESIUM BLD File of Sep 1, 2026 · source file | $907.32 | $907.32 | $42.64–$834.73 | — |
| HCA Florida Largo Hospital Clearwater, FL · (727) 588-5200 MAGNESIUM BLD File of Sep 1, 2026 · source file | $1,073.28 | $1,073.28 | $50.44–$987.42 | — |
| HCA Florida Largo West Hospital Largo, FL · (727) 588-5200 MAGNESIUM BLD File of Sep 1, 2026 · source file | $1,073.28 | $1,073.28 | $50.44–$987.42 | — |
| HCA Florida Northside Hospital St Petersburg, FL · (727) 521-5121 MAGNESIUM IONIZED+1 more line at this price File of Sep 1, 2026 · source file | $1,270.30 | $1,270.30 | $59.70–$1,168.68 | — |
| HCA Florida South Shore Hospital Apollo Beach, FL · (813) 634-3301 MAGNESIUM BLD File of Sep 1, 2026 · source file | $1,292.28 | $1,292.28 | $60.74–$1,188.90 | — |
| HCA Florida St. Petersburg Hospital St. Petersburg, FL · (727) 384-1414 MAGNESIUM URINE+1 more line at this price File of Sep 1, 2026 · source file | $1,465.74 | $1,465.74 | $68.89–$1,348.48 | — |
| HCA Florida Pasadena Hospital South Pasadena, FL · (727) 381-1000 MAGNESIUM URINE+1 more line at this price File of Sep 1, 2026 · source file | $1,465.74 | $1,465.74 | $68.89–$1,348.48 | — |
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.
No cash discount This line's cash price equals the hospital's full list price. Many hospitals still reduce bills for uninsured patients: ask the billing office for its self-pay discount in writing. More
Outpatient: lowest $4.00, median $6.00, highest $879.67 — a 219.9× difference within the same market.
As an inpatient, the same code is billed by 21 facilities here, median $6.00. 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 10 of 22 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 magnesium test is, what the price covers and why prices differ: Magnesium test explained.
3 rows held back from this comparison
They are priced below $1 or below a tenth of the national median for code 83735 ($36.96). 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.
| Hospital | Cash price | File |
|---|---|---|
| HCA Florida Trinity Hospital Tampa, FLMAGNESIUM URINE | $3.26 | file |
| HCA Florida Largo West Hospital Largo, FLMAGNESIUM OTHER | $3.67 | file |
| HCA Florida Largo Hospital Clearwater, FLMAGNESIUM OTHER | $3.67 | file |
File Link to the hospital's own price file.