Magnesium test cost in Austin, TX — inpatient
In Austin-Round Rock-San Marcos, TX, 13 hospitals list a cash price for magnesium blood test as an inpatient: from $15.53 to $134.01, with a median of $15.53. The lowest listed price is at Baylor Scott & White Medical Center - Taylor and 6 other hospitals. Across Texas, the median is $22.05 at 101 hospitals.
Cash prices at 13 facilities across 10 cities for code 83735, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Mar 5, 2026 and Jun 13, 2026.
Lowest$15.53Baylor Scott & White Medical Center - Taylor + 6 more
Median$15.53half pay less
Highest$134.01in this market
Difference8.6×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 $15.53Highest $233.63
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Baylor Scott & White Medical Center - Taylor lowest Taylor, TX HC REF ARUP, MAGNESIUM URINE 0020477 | $15.53 | $25.88 | $14.23–$20.70 | 40% | Jun 12, 2026 source file |
| Baylor Scott & White Medical Center - Round Rock lowest Round Rock, TX HC REF ARUP, MAGNESIUM URINE 0020477 | $15.53 | $25.88 | $14.23–$23.29 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Austin lowest Austin, TX HC REF ARUP, MAGNESIUM URINE 0020477 | $15.53 | $25.88 | $14.23–$18.12 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Buda lowest Buda, TX HC REF ARUP, MAGNESIUM URINE 0020477 | $15.53 | $25.88 | $14.23–$18.12 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Emergency Medical Center - Cedar Park lowest Cedar Park, TX HC REF ARUP, MAGNESIUM URINE 0020477 | $15.53 | $25.88 | $14.23–$16.82 | 40% | Jun 3, 2026 source file |
| Baylor Scott & White Medical Center - Lakeway lowest Lakeway, TX HC REF ARUP, MAGNESIUM URINE 0020477 | $15.53 | $25.88 | $14.23–$23.29 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Pflugerville lowest Pflugerville, TX HC REF ARUP, MAGNESIUM URINE 0020477 | $15.53 | $25.88 | $14.23–$23.29 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Round Rock Round Rock, TX HC REF MAYO, COMP MAGRU, CPT 83735 | $22.62 | $37.70 | $20.73–$33.93 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Pflugerville Pflugerville, TX HC REF MAYO, COMP MAGRU, CPT 83735 | $22.62 | $37.70 | $20.73–$33.93 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Emergency Medical Center - Cedar Park Cedar Park, TX HC REF MAYO, COMP MAGRU, CPT 83735 | $22.62 | $37.70 | $20.73–$24.50 | 40% | Jun 3, 2026 source file |
| Baylor Scott & White Medical Center - Lakeway Lakeway, TX HC REF MAYO, COMP MAGRU, CPT 83735 | $22.62 | $37.70 | $20.73–$33.93 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Taylor Taylor, TX HC REF MAYO, COMP MAGRU, CPT 83735 | $22.62 | $37.70 | $20.73–$30.16 | 40% | Jun 12, 2026 source file |
| Baylor Scott & White Medical Center - Buda Buda, TX HC REF MAYO, COMP MAGRU, CPT 83735 | $22.62 | $37.70 | $20.73–$26.39 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Austin Austin, TX HC REF MAYO, COMP MAGRU, CPT 83735 | $22.62 | $37.70 | $20.73–$26.39 | 40% | Jun 13, 2026 source file |
| Texas Children's Hospital - Austin Austin, TX TC MANGANESE REFERENCE TEST STONE | $34.84 | $52.00 | $20.80–$49.40 | 33% | Mar 5, 2026 source file |
| Baylor Scott & White Medical Center - Austin Austin, TX HC REF MAYO MAGU MAGNESIUM, 24 HR, U | $40.11 | $66.85 | $36.77–$46.80 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Buda Buda, TX HC REF MAYO MAGU MAGNESIUM, 24 HR, U | $40.11 | $66.85 | $36.77–$46.80 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Emergency Medical Center - Cedar Park Cedar Park, TX HC REF MAYO MAGU MAGNESIUM, 24 HR, U | $40.11 | $66.85 | $36.77–$43.45 | 40% | Jun 3, 2026 source file |
| Baylor Scott & White Medical Center - Round Rock Round Rock, TX HC REF MAYO MAGU MAGNESIUM, 24 HR, U | $40.11 | $66.85 | $36.77–$60.16 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Pflugerville Pflugerville, TX HC REF MAYO MAGU MAGNESIUM, 24 HR, U | $40.11 | $66.85 | $36.77–$60.16 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Taylor Taylor, TX HC REF MAYO MAGU MAGNESIUM, 24 HR, U | $40.11 | $66.85 | $36.77–$53.48 | 40% | Jun 12, 2026 source file |
| Baylor Scott & White Medical Center - Lakeway Lakeway, TX HC REF MAYO MAGU MAGNESIUM, 24 HR, U | $40.11 | $66.85 | $36.77–$60.16 | 40% | Jun 13, 2026 source file |
| Ascension Seton Smithville, TX MAGNESIUM, 24 HR URINE | $41.85 | $116.25 | $5.63–$52.31 | 64% | — source file |
| Texas Children's Hospital - Austin Austin, TX TC STONE RISK - MAGNESIUM URINE | $60.30 | $90.00 | $36.00–$85.50 | 33% | Mar 5, 2026 source file |
| Ascension Cedar Park Cedar Park, TX MAGNESIUM URINE 24 | $66.84 | $185.68 | $5.63–$83.56 | 64% | — source file |
| Ascension Cedar Park Cedar Park, TX MAGNESIUM IONIZED | $66.84 | $185.68 | $5.63–$83.56 | 64% | — source file |
| Ascension Seton Austin, TX MAGNESIUM, 24 HR URINE | $81.38 | $116.25 | $5.63–$52.31 | 30% | — source file |
| Texas Children's Hospital - Austin Austin, TX TC MAGNESIUM - URINE | $91.12 | $136.00 | $54.40–$129.20 | 33% | Mar 5, 2026 source file |
| Texas Children's Hospital - Austin Austin, TX TC MAGNESIUM-SERUM,URINE | $91.12 | $136.00 | $54.40–$129.20 | 33% | Mar 5, 2026 source file |
| Ascension Seton Kyle, TX MAGNESIUM | $115.56 | $321.00 | $5.63–$144.45 | 64% | — source file |
| Ascension Seton Kyle, TX MAGNESIUM URINE 24HR | $115.56 | $321.00 | $5.63–$144.45 | 64% | — source file |
| Ascension Seton Kyle, TX MAGNESIUM FLUID | $115.56 | $321.00 | $5.63–$144.45 | 64% | — source file |
| Baylor Scott & White Medical Center - Austin Austin, TX HC MAGNESIUM | $116.29 | $193.82 | $106.60–$135.67 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Emergency Medical Center - Cedar Park Cedar Park, TX HC MAGNESIUM | $116.29 | $193.82 | $106.60–$125.98 | 40% | Jun 3, 2026 source file |
| Baylor Scott & White Emergency Medical Center - Cedar Park Cedar Park, TX HC MAGNESIUM, RBC | $116.29 | $193.82 | $106.60–$125.98 | 40% | Jun 3, 2026 source file |
| Baylor Scott & White Emergency Medical Center - Cedar Park Cedar Park, TX HC MAGNESIUM - URORISK | $116.29 | $193.82 | $106.60–$125.98 | 40% | Jun 3, 2026 source file |
| Baylor Scott & White Medical Center - Lakeway Lakeway, TX HC MAGNESIUM | $116.29 | $193.82 | $106.60–$174.44 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Lakeway Lakeway, TX HC MAGNESIUM, RBC | $116.29 | $193.82 | $106.60–$174.44 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Lakeway Lakeway, TX HC MAGNESIUM - URORISK | $116.29 | $193.82 | $106.60–$174.44 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Round Rock Round Rock, TX HC MAGNESIUM | $116.29 | $193.82 | $106.60–$174.44 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Round Rock Round Rock, TX HC MAGNESIUM, RBC | $116.29 | $193.82 | $106.60–$174.44 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Round Rock Round Rock, TX HC MAGNESIUM - URORISK | $116.29 | $193.82 | $106.60–$174.44 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Taylor Taylor, TX HC MAGNESIUM | $116.29 | $193.82 | $106.60–$155.06 | 40% | Jun 12, 2026 source file |
| Baylor Scott & White Medical Center - Taylor Taylor, TX HC MAGNESIUM, RBC | $116.29 | $193.82 | $106.60–$155.06 | 40% | Jun 12, 2026 source file |
| Baylor Scott & White Medical Center - Taylor Taylor, TX HC MAGNESIUM - URORISK | $116.29 | $193.82 | $106.60–$155.06 | 40% | Jun 12, 2026 source file |
| Baylor Scott & White Medical Center - Austin Austin, TX HC MAGNESIUM, RBC | $116.29 | $193.82 | $106.60–$135.67 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Austin Austin, TX HC MAGNESIUM - URORISK | $116.29 | $193.82 | $106.60–$135.67 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Buda Buda, TX HC MAGNESIUM | $116.29 | $193.82 | $106.60–$135.67 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Buda Buda, TX HC MAGNESIUM, RBC | $116.29 | $193.82 | $106.60–$135.67 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Buda Buda, TX HC MAGNESIUM - URORISK | $116.29 | $193.82 | $106.60–$135.67 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Pflugerville Pflugerville, TX HC MAGNESIUM | $116.29 | $193.82 | $106.60–$174.44 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Pflugerville Pflugerville, TX HC MAGNESIUM, RBC | $116.29 | $193.82 | $106.60–$174.44 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Pflugerville Pflugerville, TX HC MAGNESIUM - URORISK | $116.29 | $193.82 | $106.60–$174.44 | 40% | Jun 13, 2026 source file |
| Ascension Seton Austin, TX MAGNESIUM FLUID | $120.15 | $333.75 | $5.63–$150.19 | 64% | — source file |
| Ascension Seton Smithville, TX MAGNESIUM URINE 24HR | $120.15 | $333.75 | $5.63–$150.19 | 64% | — source file |
| Ascension Seton Smithville, TX MAGNESIUM | $120.15 | $333.75 | $5.63–$150.19 | 64% | — source file |
| Ascension Seton Austin, TX MAGNESIUM FLUID | $120.15 | $333.75 | $5.63–$150.19 | 64% | — source file |
| Ascension Seton Austin, TX MAGNESIUM | $120.15 | $333.75 | $5.63–$150.19 | 64% | — source file |
| Ascension Seton Austin, TX MAGNESIUM, 24 HR URINE | $120.15 | $333.75 | $5.63–$150.19 | 64% | — source file |
| Ascension Seton Austin, TX MAGNESIUM FLUID | $120.15 | $333.75 | $5.63–$150.19 | 64% | — source file |
| Ascension Seton Austin, TX MAGNESIUM | $120.15 | $333.75 | $5.63–$150.19 | 64% | — source file |
| Ascension Seton Austin, TX MAGNESIUM, 24 HR URINE | $120.15 | $333.75 | $5.63–$150.19 | 64% | — source file |
| Ascension Seton Smithville, TX MAGNESIUM FLUID | $120.15 | $333.75 | $5.63–$150.19 | 64% | — source file |
| Ascension Seton Kyle, TX MAGNESIUM, 24 HR URINE | $120.15 | $333.75 | $5.63–$150.19 | 64% | — source file |
| Ascension Seton Austin, TX MAGNESIUM | $120.15 | $333.75 | $5.63–$150.19 | 64% | — source file |
| Ascension Seton Austin, TX MAGNESIUM FLUID | $120.15 | $333.75 | $5.63–$150.19 | 64% | — source file |
| Ascension Seton Austin, TX MAGNESIUM, 24 HR URINE | $120.15 | $333.75 | $5.63–$150.19 | 64% | — source file |
| Ascension Seton Austin, TX MAGNESIUM | $120.15 | $333.75 | $5.63–$150.19 | 64% | — source file |
| Ascension Seton Austin, TX MAGNESIUM, 24 HR URINE | $120.15 | $333.75 | $5.63–$150.19 | 64% | — source file |
| Ascension Cedar Park Cedar Park, TX MAGNESIUM | $127.44 | $353.99 | $5.63–$159.30 | 64% | — source file |
| Ascension Seton Luling, TX MAGNESIUM FLUID | $134.01 | $372.25 | $5.63–$167.51 | 64% | — source file |
| Ascension Seton Luling, TX MAGNESIUM | $134.01 | $372.25 | $5.63–$167.51 | 64% | — source file |
| Ascension Seton Luling, TX MAGNESIUM URINE 24HR | $134.01 | $372.25 | $5.63–$167.51 | 64% | — source file |
| Ascension Seton Austin, TX MAGNESIUM URINE 24HR | $233.63 | $333.75 | $5.63–$150.19 | 30% | — source file |
| Ascension Seton Austin, TX MAGNESIUM | $233.63 | $333.75 | $5.63–$150.19 | 30% | — source file |
| Ascension Seton Austin, TX MAGNESIUM FLUID | $233.63 | $333.75 | $5.63–$150.19 | 30% | — source file |
Inpatient: lowest $15.53, median $15.53, highest $134.01 — a 8.6× difference within the same market.
As an outpatient, the same code is billed by 13 facilities here, median $15.53 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 12 of 13 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 magnesium test measures the level of magnesium in the blood. Doctors order it for muscle cramps or weakness, an irregular heartbeat, low potassium or calcium that does not correct, and for people on diuretics, long-term acid-reducing drugs or with kidney disease.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.