C-peptide test cost in Nashville, TN
In Nashville-Davidson--Murfreesboro--Franklin, TN, 21 hospitals list a cash price for C-peptide blood test: from $27.05 to $1,656.92, with a median of $87.73. The lowest listed price is at Saint Thomas Hospital for Specialty Surgery — $60.68 less than the median here. Across Tennessee, the median is $63.58 at 86 hospitals.
Cash prices at 21 facilities across 16 cities for code 84681, as an outpatient — the setting a self-pay patient normally buys. Collected Oct 2, 2026; the hospital files themselves were last updated between Oct 1, 2025 and Sep 1, 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 Nashville-Davidson--Murfreesboro--Franklin, TN.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Saint Thomas Hospital for Specialty Surgery lowest Nashville, TN ASSAY OF C-PEPTIDE File of Apr 14, 2026 · source file | $27.05 | — | $18.73–$584.01 | — |
| Vanderbilt Wilson County Hospital Lebanon, TN · (615) 444-2250 HC C-PEPTIDE File of Oct 1, 2025 · source file | $44.37 | $153.00 | $19.72–$122.40 | 71% |
| Macon Community Hospital Lafayette, TN · (615) 666-2147 CPEPTIDE ULTRASENSITIVE LC File of Mar 21, 2026 · source file | $74.94 | $124.90 | $12.87–$112.41 | 40% |
| Sumner Regional Medical Center Gallatin, TN · (615) 328-8888 C-peptide File of Jul 10, 2026 · source file | $75.28 | $323.09 | $68.04 | 77% |
| Williamson Medical Center Franklin, TN · (615) 435-5000 C-PEPTIDE File of Aug 1, 2026 · source file | $77.64 | $137.70 | $55.49–$130.81 | 44% |
| Saint Thomas Rutherford Hospital Murfreesboro, TN · (615) 396-4100 C-PEPTIDE+1 more line at this price File of Jan 1, 2026 · source file | $79.41 | $264.70 | $18.73–$80.14 | 70% |
| Stones River Hospital Woodbury, TN · (615) 563-4001 C-PEPTIDE+1 more line at this price File of Jul 1, 2026 · source file | $79.41 | $264.70 | $14.59–$80.14 | 70% |
| Saint Thomas West Hospital Harding Pk Nashville, TN · (615) 222-2111 C-PEPTIDE+1 more line at this price File of Jan 1, 2026 · source file | $79.41 | $264.70 | $18.73–$80.14 | 70% |
| Vanderbilt University Medical Center Nashville, TN · (615) 322-3454 HC C-PEPTIDE File of Oct 1, 2025 · source file | $82.62 | $153.00 | $18.90–$122.40 | 46% |
| Metro Nashville General Hospital Nashville, TN · (615) 341-4000 Serum, C-Peptide ARUP File of Sep 1, 2026 · source file | $84.60 | $141.00 | — | 40% |
| Riverview Regional Medical Center Carthage, TN · (615) 735-9815 C-peptide File of Jul 10, 2026 · source file | $87.73 | $269.12 | $90.72 | 67% |
| Trousdale Medical Center Hartsville, TN · (615) 374-2221 C-peptide File of Jul 10, 2026 · source file | $136.56 | $269.34 | $60.89 | 49% |
| Tristar Northcrest Medical Center Springfield, TN · (615) 384-2411 C-peptide +1 more line at this price File of Sep 1, 2026 · source file | $442.22 | $442.22 | $20.81–$362.62 | — |
| Tristar Horizon Medical Center Dickson, TN · (615) 446-0446 C-peptide +1 more line at this price File of Sep 1, 2026 · source file | $529.34 | $529.34 | $20.81–$486.99 | — |
| Tristar Summit Medical Center Mt Juliet, TN · (615) 316-3000 C-PEPTIDE+1 more line at this price File of Sep 1, 2026 · source file | $751.00 | $751.00 | $20.81–$660.88 | — |
| Tristar Skyline Medical Center Nashville, TN · (615) 769-2000 C-PEPTIDE+1 more line at this price File of Sep 1, 2026 · source file | $781.63 | $781.63 | $9.36–$766.00 | — |
| Tristar Hendersonville Medical Center Portland, TN · (615) 338-1000 C-peptide +1 more line at this price File of Sep 1, 2026 · source file | $1,091.84 | $1,091.84 | $9.36–$1,004.49 | — |
| Tristar Stonecrest Medical Center Smyrna, TN · (615) 768-2000 C-peptide +1 more line at this price File of Sep 1, 2026 · source file | $1,276.08 | $1,276.08 | $20.81–$1,173.99 | — |
| Tristar Southern Hills Medical Center Nashville, TN · (615) 781-4000 C-peptide +1 more line at this price File of Sep 1, 2026 · source file | $1,386.00 | $1,386.00 | $20.81–$1,219.68 | — |
| Tristar Ashland City Medical Center Ashland City, TN · (615) 792-3030 C-PEPTIDE+1 more line at this price File of Sep 1, 2026 · source file | $1,540.75 | $1,540.75 | $20.81–$2,000.00 | — |
| Tristar Centennial Medical Center Nashville, TN · (615) 342-1000 C-PEPTIDE+1 more line at this price File of Sep 1, 2026 · source file | $1,656.92 | $1,656.92 | $20.81–$1,656.92 | — |
Outpatient: lowest $27.05, median $87.73, highest $1,656.92 — a 61.3× difference within the same market.
As an inpatient, the same code is billed by 7 facilities here, median $79.41. 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 20 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 1 it is 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 C-peptide test shows how much insulin the pancreas is making. It helps tell type 1 from type 2 diabetes and find the cause of low blood sugar.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.