Magnesium test cost in Austin, TX
In Austin-Round Rock-San Marcos, TX, 28 hospitals list a cash price for magnesium blood test: from $7.37 to $599.00, with a median of $98.47. The lowest listed price is at The Hospital at Westlake Medical Center — $91.10 less than the median here. Across Texas, the median is $48.00 at 301 hospitals.
- The median here, $98.47, is 137% above the US median of $41.60.
- That is 14.7× Medicare's 2026 national rate for the same service ($6.70).
- Austin, TX ranks 3rd of 4 metro areas in Texas by median, cheapest first.
- 10 of 28 hospitals list a cash price equal to their full list price, with no self-pay discount.
Cash prices at 28 facilities across 14 cities for code 83735, as an outpatient — the setting a self-pay patient normally buys. Collected Nov 11, 2026; the hospital files themselves were last updated between Sep 2, 2024 and Oct 30, 2026.
Lowest$7.37The Hospital at Westlake Medical Center
Median$98.47half of hospitals charge less
Highest$599.00in this market
Difference81.3×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 Austin-Round Rock-San Marcos, TX.
median
Lowest $7.37Highest $829.00
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| The Hospital at Westlake Medical Center lowest Austin, TX · (512) 327-0000 URINE MAG RANDOM+3 more lines at this price File of Sep 2, 2024 · source file | $7.37 | $43.55 | $5.63–$57.65 | 83% |
| Baylor Scott & White Medical Center - Lakeway Lakeway, TX · (512) 509-0401 HC REF ARUP, MAGNESIUM URINE 0020477 File of Jun 13, 2026 · source file | $15.53 | $25.88 | $5.63–$42.28 | 40% |
| Baylor Scott & White Medical Center - Round Rock Round Rock, TX · (512) 509-0401 HC REF ARUP, MAGNESIUM URINE 0020477 File of Jun 13, 2026 · source file | $15.53 | $25.88 | $5.63–$42.28 | 40% |
| Baylor Scott & White Medical Center - Buda Buda, TX · (737) 999-6200 HC REF ARUP, MAGNESIUM URINE 0020477 File of Jun 13, 2026 · source file | $15.53 | $25.88 | $5.63–$42.28 | 40% |
| Baylor Scott & White Emergency Medical Center - Cedar Park Cedar Park, TX · (512) 509-0401 HC REF ARUP, MAGNESIUM URINE 0020477 File of Jun 3, 2026 · source file | $15.53 | $25.88 | $7.04–$16.82 | 40% |
| Baylor Scott & White Medical Center - Taylor Taylor, TX · (512) 352-7611 HC REF ARUP, MAGNESIUM URINE 0020477 File of Oct 30, 2026 · source file | $15.53 | $25.88 | $4.92–$44.15 | 40% |
| Baylor Scott & White Medical Center - Pflugerville Pflugerville, TX · (512) 654-6100 HC REF ARUP, MAGNESIUM URINE 0020477 File of Jun 13, 2026 · source file | $15.53 | $25.88 | $5.63–$42.28 | 40% |
| Baylor Scott & White Medical Center - Austin Austin, TX · (512) 654-2100 HC REF ARUP, MAGNESIUM URINE 0020477 File of Jun 13, 2026 · source file | $15.53 | $25.88 | $5.63–$42.28 | 40% |
| Baylor Scott & White Medical Center - Austin Austin, TX · (512) 654-2100 HC REF MAYO, COMP MAGRU, CPT 83735 File of Jun 13, 2026 · source file | $22.62 | $37.70 | $5.63–$42.28 | 40% |
| Baylor Scott & White Medical Center - Lakeway Lakeway, TX · (512) 509-0401 HC REF MAYO, COMP MAGRU, CPT 83735 File of Jun 13, 2026 · source file | $22.62 | $37.70 | $5.63–$42.28 | 40% |
| Baylor Scott & White Emergency Medical Center - Cedar Park Cedar Park, TX · (512) 509-0401 HC REF MAYO, COMP MAGRU, CPT 83735 File of Jun 3, 2026 · source file | $22.62 | $37.70 | $7.04–$24.50 | 40% |
| Baylor Scott & White Medical Center - Taylor Taylor, TX · (512) 352-7611 HC REF MAYO, COMP MAGRU, CPT 83735 File of Oct 30, 2026 · source file | $22.62 | $37.70 | $7.16–$44.15 | 40% |
| Baylor Scott & White Medical Center - Round Rock Round Rock, TX · (512) 509-0401 HC REF MAYO, COMP MAGRU, CPT 83735 File of Jun 13, 2026 · source file | $22.62 | $37.70 | $5.63–$42.28 | 40% |
| Baylor Scott & White Medical Center - Buda Buda, TX · (737) 999-6200 HC REF MAYO, COMP MAGRU, CPT 83735 File of Jun 13, 2026 · source file | $22.62 | $37.70 | $5.63–$42.28 | 40% |
| Baylor Scott & White Medical Center - Pflugerville Pflugerville, TX · (512) 654-6100 HC REF MAYO, COMP MAGRU, CPT 83735 File of Jun 13, 2026 · source file | $22.62 | $37.70 | $5.63–$42.28 | 40% |
| Texas Children's Hospital - Austin Austin, TX · (832) 824-1100 TC MANGANESE REFERENCE TEST STONE File of Mar 5, 2026 · source file | $34.84 | $52.00 | $6.70–$49.40 | 33% |
| Baylor Scott & White Medical Center - Austin Austin, TX · (512) 654-2100 HC REF MAYO MAGU MAGNESIUM, 24 HR, U File of Jun 13, 2026 · source file | $40.11 | $66.85 | $5.63–$50.14 | 40% |
| Baylor Scott & White Medical Center - Buda Buda, TX · (737) 999-6200 HC REF MAYO MAGU MAGNESIUM, 24 HR, U File of Jun 13, 2026 · source file | $40.11 | $66.85 | $5.63–$50.14 | 40% |
| Baylor Scott & White Medical Center - Pflugerville Pflugerville, TX · (512) 654-6100 HC REF MAYO MAGU MAGNESIUM, 24 HR, U File of Jun 13, 2026 · source file | $40.11 | $66.85 | $5.63–$60.16 | 40% |
| Baylor Scott & White Medical Center - Taylor Taylor, TX · (512) 352-7611 HC REF MAYO MAGU MAGNESIUM, 24 HR, U File of Oct 30, 2026 · source file | $40.11 | $66.85 | $9.82–$53.48 | 40% |
| Baylor Scott & White Medical Center - Lakeway Lakeway, TX · (512) 509-0401 HC REF MAYO MAGU MAGNESIUM, 24 HR, U File of Jun 13, 2026 · source file | $40.11 | $66.85 | $5.63–$60.16 | 40% |
| Baylor Scott & White Emergency Medical Center - Cedar Park Cedar Park, TX · (512) 509-0401 HC REF MAYO MAGU MAGNESIUM, 24 HR, U File of Jun 3, 2026 · source file | $40.11 | $66.85 | $7.04–$43.45 | 40% |
| Baylor Scott & White Medical Center - Round Rock Round Rock, TX · (512) 509-0401 HC REF MAYO MAGU MAGNESIUM, 24 HR, U File of Jun 13, 2026 · source file | $40.11 | $66.85 | $5.63–$60.16 | 40% |
| Ascension Seton Smithville Smithville, TX · (512) 237-3214 MAGNESIUM, 24 HR URINE+1 more line at this price File of Jan 1, 2026 · source file | $41.85 | $116.25 | $5.63–$52.31 | 64% |
| St. David's North Austin Medical Center Austin, TX · (512) 901-1000 MAGNESIUM URINE File of Sep 1, 2026 · source file | $53.00 | $53.00 | $2.65–$47.70 | — |
| St. David's South Austin Medical Center Bastrop, TX · (512) 448-7107 MAGNESIUM OTHER File of Sep 1, 2026 · source file | $58.00 | $58.00 | $39.09 | — |
| Texas Children's Hospital - Austin Austin, TX · (832) 824-1100 TC STONE RISK - MAGNESIUM URINE File of Mar 5, 2026 · source file | $60.30 | $90.00 | $6.70–$85.50 | 33% |
| Ascension Cedar Park Cedar Park, TX · (512) 528-7000 MAGNESIUM IONIZED+3 more lines at this price File of Jan 1, 2026 · source file | $66.84 | $185.68 | $5.63–$83.56 | 64% |
| Ascension Seton Austin, TX MAGNESIUM, 24 HR URINE+1 more line at this price File of Jan 1, 2026 · source file | $81.38 | $116.25 | $5.63–$52.31 | 30% |
| Texas Children's Hospital - Austin Austin, TX · (832) 824-1100 TC MAGNESIUM - URINE+1 more line at this price File of Mar 5, 2026 · source file | $91.12 | $136.00 | $6.70–$129.20 | 33% |
| Ascension Seton Hays Kyle, TX · (512) 324-5000 MAGNESIUM+5 more lines at this price File of Jan 1, 2026 · source file | $115.56 | $321.00 | $5.63–$144.45 | 64% |
| Baylor Scott & White Medical Center - Austin Austin, TX · (512) 654-2100 HC MAGNESIUM+2 more lines at this price File of Jun 13, 2026 · source file | $116.29 | $193.82 | $5.63–$145.37 | 40% |
| Baylor Scott & White Medical Center - Pflugerville Pflugerville, TX · (512) 654-6100 HC MAGNESIUM - URORISK+2 more lines at this price File of Jun 13, 2026 · source file | $116.29 | $193.82 | $5.63–$174.44 | 40% |
| Baylor Scott & White Medical Center - Buda Buda, TX · (737) 999-6200 HC MAGNESIUM - URORISK+2 more lines at this price File of Jun 13, 2026 · source file | $116.29 | $193.82 | $5.63–$145.37 | 40% |
| Baylor Scott & White Medical Center - Round Rock Round Rock, TX · (512) 509-0401 HC MAGNESIUM+2 more lines at this price File of Jun 13, 2026 · source file | $116.29 | $193.82 | $5.63–$174.44 | 40% |
| Baylor Scott & White Emergency Medical Center - Cedar Park Cedar Park, TX · (512) 509-0401 HC MAGNESIUM+2 more lines at this price File of Jun 3, 2026 · source file | $116.29 | $193.82 | $7.04–$125.98 | 40% |
| Baylor Scott & White Medical Center - Lakeway Lakeway, TX · (512) 509-0401 HC MAGNESIUM+2 more lines at this price File of Jun 13, 2026 · source file | $116.29 | $193.82 | $5.63–$174.44 | 40% |
| Ascension Seton Smithville Smithville, TX · (512) 237-3214 MAGNESIUM+5 more lines at this price File of Jan 1, 2026 · source file | $120.15 | $333.75 | $5.63–$150.19 | 64% |
| Ascension Seton Medical Center Austin Austin, TX · (512) 324-1000 MAGNESIUM FLUID+5 more lines at this price File of Jan 1, 2026 · source file | $120.15 | $333.75 | $5.63–$150.19 | 64% |
| Ascension Seton Northwest Austin, TX · (512) 324-6000 MAGNESIUM FLUID+5 more lines at this price File of Jan 1, 2026 · source file | $120.15 | $333.75 | $5.63–$150.19 | 64% |
| Ascension Seton Hays Kyle, TX · (512) 324-5000 MAGNESIUM, 24 HR URINE+1 more line at this price File of Jan 1, 2026 · source file | $120.15 | $333.75 | $5.63–$150.19 | 64% |
| Dell Seton Medical Center at the University of Tx Austin, TX · (512) 324-7000 MAGNESIUM+5 more lines at this price File of Jan 1, 2026 · source file | $120.15 | $333.75 | $5.63–$150.19 | 64% |
| Ascension Seton Southwest Austin, TX · (512) 324-9000 MAGNESIUM FLUID+5 more lines at this price File of Jan 1, 2026 · source file | $120.15 | $333.75 | $5.63–$150.19 | 64% |
| Baylor Scott & White Medical Center - Taylor Taylor, TX · (512) 352-7611 HC MAGNESIUM, RBC+2 more lines at this price File of Oct 30, 2026 · source file | $120.94 | $201.57 | $9.82–$161.26 | 40% |
| Ascension Cedar Park Cedar Park, TX · (512) 528-7000 MAGNESIUM+1 more line at this price File of Jan 1, 2026 · source file | $127.44 | $353.99 | $5.63–$159.30 | 64% |
| Ascension Seton Edgar B Davis Luling, TX · (830) 875-7000 MAGNESIUM URINE 24HR+5 more lines at this price File of Jan 1, 2026 · source file | $134.01 | $372.25 | $5.63–$167.51 | 64% |
| Pam Specialty Hospital of Luling Luling, TX Magnesium File of Aug 6, 2026 · source file | $163.30 | $163.30 | $5.03–$146.97 | — |
| Heart Hosp of Austin Austin, TX MAGNESIUM RBC File of Sep 1, 2026 · source file | $168.00 | $168.00 | $113.23 | — |
| Heart Hosp of Austin at St. David's Round Rock Round Rock, TX MAGNESIUM RBC File of Sep 1, 2026 · source file | $168.00 | $168.00 | $113.23 | — |
| St. David's Medical Center Manor, TX · (512) 476-7111 MAGNESIUM RBC File of Sep 1, 2026 · source file | $168.00 | $168.00 | $8.40–$151.20 | — |
| St. David's Georgetown Hospital Georgetown, TX · (512) 476-7111 MAGNESIUM RBC File of Sep 1, 2026 · source file | $168.00 | $168.00 | $113.23 | — |
| Ascension Seton Austin, TX MAGNESIUM URINE 24HR+5 more lines at this price File of Jan 1, 2026 · source file | $233.63 | $333.75 | $5.63–$150.19 | 30% |
| Cornerstone Specialty Hospitals Round Rock Round Rock, TX MAGNESIUM File of Apr 1, 2026 · source file | $264.00 | $264.00 | — | — |
| St. David's Medical Center Manor, TX · (512) 476-7111 MAGNESIUM URINE File of Sep 1, 2026 · source file | $300.00 | $300.00 | $202.20 | — |
| Heart Hosp of Austin at St. David's Round Rock Round Rock, TX MAGNESIUM URINE File of Sep 1, 2026 · source file | $300.00 | $300.00 | $202.20 | — |
| Heart Hosp of Austin Austin, TX MAGNESIUM URINE File of Sep 1, 2026 · source file | $300.00 | $300.00 | $202.20 | — |
| St.davids Surgical Hospital Austin, TX MAGNESIUM URINE File of Sep 1, 2026 · source file | $323.00 | $323.00 | $16.15–$274.55 | — |
| Heart Hosp of Austin Austin, TX MAGNESIUM BLD File of Sep 1, 2026 · source file | $384.00 | $384.00 | $19.20–$326.40 | — |
| St. David's Georgetown Hospital Georgetown, TX · (512) 476-7111 MAGNESIUM BLD File of Sep 1, 2026 · source file | $384.00 | $384.00 | $268.42 | — |
| Heart Hosp of Austin at St. David's Round Rock Round Rock, TX MAGNESIUM BLD File of Sep 1, 2026 · source file | $384.00 | $384.00 | $268.42 | — |
| St. David's Medical Center Manor, TX · (512) 476-7111 MAGNESIUM BLD File of Sep 1, 2026 · source file | $384.00 | $384.00 | $258.82 | — |
| St. David's Georgetown Hospital Georgetown, TX · (512) 476-7111 MAGNESIUM URINE File of Sep 1, 2026 · source file | $440.00 | $440.00 | $22.00–$374.00 | — |
| Heart Hosp of Austin at St. David's Round Rock Round Rock, TX MAGNESIUM OTHER File of Sep 1, 2026 · source file | $513.00 | $513.00 | $345.76 | — |
| St. David's Georgetown Hospital Georgetown, TX · (512) 476-7111 MAGNESIUM OTHER File of Sep 1, 2026 · source file | $513.00 | $513.00 | $345.76 | — |
| St. David's Medical Center Manor, TX · (512) 476-7111 MAGNESIUM OTHER File of Sep 1, 2026 · source file | $513.00 | $513.00 | $25.65–$461.70 | — |
| Heart Hosp of Austin Austin, TX MAGNESIUM OTHER File of Sep 1, 2026 · source file | $513.00 | $513.00 | $345.76 | — |
| St. David's South Austin Medical Center Bastrop, TX · (512) 448-7107 MAGNESIUM BLD File of Sep 1, 2026 · source file | $568.00 | $568.00 | $357.84 | — |
| St. David's Round Rock Medical Center Leander, TX · (512) 341-1000 MAGNESIUM URINE File of Sep 1, 2026 · source file | $599.00 | $599.00 | $418.70 | — |
| St. David's South Austin Medical Center Bastrop, TX · (512) 448-7107 MAGNESIUM URINE File of Sep 1, 2026 · source file | $651.00 | $651.00 | $438.77 | — |
| St. David's Round Rock Medical Center Leander, TX · (512) 341-1000 MAGNESIUM BLD File of Sep 1, 2026 · source file | $664.00 | $664.00 | $33.20–$597.60 | — |
| St. David's North Austin Medical Center Austin, TX · (512) 901-1000 MAGNESIUM BLD File of Sep 1, 2026 · source file | $829.00 | $829.00 | $551.28 | — |
| St.davids Surgical Hospital Austin, TX MAGNESIUM BLD File of Sep 1, 2026 · source file | $829.00 | $829.00 | $551.28 | — |
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 $7.37, median $98.47, highest $599.00 — a 81.3× difference within the same market.
As an inpatient, the same code is billed by 19 facilities here, median $66.84. 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 17 of 27 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.