C-peptide test cost in New York, NY
In New York-Newark-Jersey City, NY-NJ, 68 hospitals list a cash price for C-peptide blood test: from $11.00 to $1,262.00, with a median of $24.97. The lowest listed price is at Stony Brook University Hospital — $13.97 less than the median here. Across New York, the median is $76.84 at 108 hospitals.
Cash prices at 68 facilities across 48 cities for code 84681, as an outpatient — the setting a self-pay patient normally buys. Collected Oct 3, 2026; the hospital files themselves were last updated between Apr 22, 2025 and Sep 23, 2026.
Lowest$11.00Stony Brook University Hospital
Median$24.97half of hospitals charge less
Highest$1,262.00in this market
Difference114.7×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 New York-Newark-Jersey City, NY-NJ.
median
Lowest $11.00Highest $1,262.00
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Stony Brook University Hospital lowest Stony Brook, NY · (631) 444-4000 C-PEPTIDE (PROTEIN) LEVEL File of Jun 10, 2026 · source file | $11.00 | $11.00 | $20.81–$4,255.00 | — |
| Saint Marys Hospital Passaic, NJ · (973) 365-4300 Hc Assay Of C-Peptide File of Sep 1, 2026 · source file | $20.00 | $73.88 | $12.49–$62.80 | 73% |
| Southern Ocean Medical Center Manahawkin, NJ · (609) 597-6011 C PEPTIDE QST+3 more lines at this price File of Dec 31, 2025 · source file | $20.81 | $255.00 | $10.55–$308.85 | 92% |
| Bayshore Medical Center Holmdel, NJ · (732) 739-5900 C-PEPTIDE+3 more lines at this price File of Dec 31, 2025 · source file | $20.81 | $57.00 | $20.81–$248.17 | 63% |
| Queens Hospital Center Jamaica, NY · (718) 883-3000 HC C-PEPTIDE File of Sep 5, 2026 · source file | $20.81 | $87.22 | $20.39–$100.51 | 76% |
| Hackensack University Medical Center Hackensack, NJ · (551) 996-2000 C-PEPTIDE+3 more lines at this price File of Dec 31, 2025 · source file | $20.81 | $57.00 | $14.31–$314.00 | 63% |
| Raritan Bay Medical Center Perth Amboy, NJ · (732) 324-5000 C-PEPTIDE+3 more lines at this price File of Dec 31, 2025 · source file | $20.81 | $57.00 | $7.58–$305.49 | 63% |
| Elmhurst Hospital Center Broadway Elmhurst, NY · (718) 334-1141 HC C-PEPTIDE File of Sep 5, 2026 · source file | $20.81 | $87.22 | $20.39–$67.70 | 76% |
| South Brooklyn Health Brooklyn, NY · (718) 616-4834 HC C-PEPTIDE File of Sep 5, 2026 · source file | $20.81 | $87.22 | $20.39–$114.59 | 76% |
| Woodhull Medical & Mental Health Center Brooklyn, NY · (718) 963-8100 HC C-PEPTIDE File of Sep 5, 2026 · source file | $20.81 | $87.22 | $1.00–$79.93 | 76% |
| Kings County Hospital Center Brooklyn, NY · (718) 245-3901 HC C-PEPTIDE File of Sep 5, 2026 · source file | $20.81 | $87.22 | $1.00–$79.93 | 76% |
| St Joseph's Hospital, Yonkers Yonkers, NY · (914) 378-7000 Assay of c-peptide+2 more lines at this price File of Jul 13, 2026 · source file | $20.81 | — | $18.08–$292.28 | — |
| Palisades Medical Center North Bergen, NJ · (201) 854-5000 C-PEPTIDE+3 more lines at this price File of Dec 31, 2025 · source file | $20.81 | $57.00 | $20.81–$95.36 | 63% |
| Jersey Shore University Medical Center Neptune City, NJ · (732) 775-5500 C-PEPTIDE+3 more lines at this price File of Dec 31, 2025 · source file | $20.81 | $57.00 | $9.46–$314.00 | 63% |
| Metropolitan Hospital Center New York, NY · (212) 423-6262 HC C-PEPTIDE File of Sep 5, 2026 · source file | $20.81 | $87.22 | $20.39–$63.56 | 76% |
| Jacobi Medical Center Bronx, NY · (718) 918-5000 HC C-PEPTIDE File of Sep 5, 2026 · source file | $20.81 | $87.22 | $20.39–$124.72 | 76% |
| Old Bridge Medical Center Old Bridge, NJ C-PEPTIDE+3 more lines at this price File of Dec 31, 2025 · source file | $20.81 | $57.00 | $7.58–$305.49 | 63% |
| Ocean Medical Center Brick, NJ · (732) 840-2200 C PEPTIDE QST+7 more lines at this price File of Dec 31, 2025 · source file | $20.81 | $255.00 | $8.09–$305.58 | 92% |
| Riverview Medical Center Red Bank, NJ · (732) 741-2700 C-PEPTIDE+3 more lines at this price File of Dec 31, 2025 · source file | $20.81 | $57.00 | $8.04–$307.56 | 63% |
| Lincoln Medical & Mental Health Center Bronx, NY · (718) 579-5000 HC C-PEPTIDE File of Sep 5, 2026 · source file | $20.81 | $87.22 | $20.39–$72.72 | 76% |
| Bellevue Hospital Center New York, NY · (212) 561-4132 HC C-PEPTIDE File of Sep 5, 2026 · source file | $20.81 | $87.22 | $1.00–$80.18 | 76% |
| JFK University Medical Center Edison, NJ · (732) 321-7000 C-PEPTIDE+7 more lines at this price File of Dec 31, 2025 · source file | $20.81 | $57.00 | $9.18–$297.04 | 63% |
| North Central Bronx Hospital Bronx, NY HC C-PEPTIDE File of Sep 5, 2026 · source file | $20.81 | $87.22 | $20.39–$61.38 | 76% |
| Harlem Hospital Center New York, NY · (212) 939-1000 HC C-PEPTIDE File of Sep 5, 2026 · source file | $20.81 | $87.22 | $20.39–$100.73 | 76% |
| CentraState Medical Center Freehold Township, NJ · (732) 294-7012 C-Peptide File of Apr 1, 2026 · source file | $23.93 | $184.00 | — | 87% |
| Newton Medical Center Newton, NJ · (973) 383-2121 C-Peptide File of Apr 1, 2026 · source file | $23.93 | $58.00 | — | 59% |
| Overlook Medical Center Summit, NJ · (908) 522-2000 C-Peptide File of Apr 1, 2026 · source file | $23.93 | $58.00 | — | 59% |
| Hackensack Meridian Mountainside Medical Center Montclair, NJ · (973) 429-6000 C-peptide (protein) level File of Feb 12, 2026 · source file | $23.93 | $203.70 | $20.81–$204.30 | 88% |
| Chilton Medical Center Pompton Plains, NJ · (973) 831-5000 C-Peptide File of Apr 1, 2026 · source file | $23.93 | $58.00 | — | 59% |
| University Hospital Newark, NJ · (973) 972-4300 ASSAY OF C-PEPTIDE File of Aug 13, 2026 · source file | $23.93 | $156.06 | $14.08–$148.26 | 85% |
| Morristown Medical Center Morristown, NJ · (973) 971-5450 C-Peptide File of Apr 1, 2026 · source file | $23.93 | $58.00 | — | 59% |
| NYU Langone Hospital - Suffolk Patchogue, NY · (631) 654-7100 HC ASSAY OF C-PEPTIDE File of Jan 1, 2026 · source file | $24.97 | $235.64 | $18.73–$235.64 | 89% |
| NYU Langone Brooklyn, NY HC ASSAY OF C-PEPTIDE File of Jan 1, 2026 · source file | $24.97 | $235.64 | $18.73–$235.64 | 89% |
| NYU Langone Mineola, NY HC ASSAY OF C-PEPTIDE File of Jan 1, 2026 · source file | $24.97 | $235.64 | $18.73–$235.64 | 89% |
| NYU Langone – Tisch Hospital New York, NY · (212) 263-7300 HC ASSAY OF C-PEPTIDE File of Jan 1, 2026 · source file | $24.97 | $235.64 | $18.73–$235.64 | 89% |
| NYU Langone – Orthopedic Hospital New York, NY HC ASSAY OF C-PEPTIDE File of Jan 1, 2026 · source file | $24.97 | $235.64 | $18.73–$235.64 | 89% |
| The Valley Hospital Paramus, NJ · (201) 447-8000 REF C-PEPTIDE REACTIVITY File of May 6, 2026 · source file | $34.20 | $57.00 | $16.65–$66.38 | 40% |
| Bronx-Lebanon Hospital Center - Concourse Division Bronx, NY · (212) 588-7000 C-PEPTIDE File of Apr 17, 2026 · source file | $45.78 | $45.78 | — | — |
| BronxCare Hospital Center - Fulton Campus Bronx, NY · (212) 588-7000 C-PEPTIDE File of May 5, 2026 · source file | $45.78 | $45.78 | — | — |
| Englewood Health Englewood, NJ · (201) 894-3000 C-Peptide Reactivity 84681 File of Feb 2, 2026 · source file | $69.40 | $694.00 | $54.27–$555.20 | 90% |
| Mercy Medical Center Rockville Centre, NY · (516) 705-2525 HC C PEPTIDE REACTIVITY File of Feb 19, 2026 · source file | $76.84 | $411.00 | $20.39–$411.00 | 81% |
| St. Catherine of Siena Medical Center Smithtown, NY · (631) 862-3000 HC C PEPTIDE REACTIVITY File of Feb 19, 2026 · source file | $76.84 | $411.00 | $20.39–$411.00 | 81% |
| Chsli St Joseph Hospital Bethpage, NY · (516) 759-6000 HC C PEPTIDE REACTIVITY File of Feb 19, 2026 · source file | $76.84 | $411.00 | $20.39–$411.00 | 81% |
| St. Francis Hospital Roslyn, NY HC C PEPTIDE REACTIVITY File of Feb 19, 2026 · source file | $76.84 | $411.00 | $20.39–$411.00 | 81% |
| Good Samaritan Hospital Medical Center West Islip, NY · (631) 376-3000 HC C PEPTIDE REACTIVITY File of Feb 19, 2026 · source file | $76.84 | $411.00 | $20.39–$411.00 | 81% |
| The Valley Hospital Paramus, NJ · (201) 447-8000 ASSAY OF C-PEPTIDE 6075352 File of May 6, 2026 · source file | $103.80 | $173.00 | $16.65–$147.05 | 40% |
| Maimonides Medical Center Brooklyn, NY · (718) 283-6000 C-PEPTIDE File of Apr 1, 2026 · source file | $106.00 | $106.00 | — | — |
| Overlook Medical Center Summit, NJ · (908) 522-2000 C-Peptide File of Apr 1, 2026 · source file | $110.51 | $1,686.00 | — | 93% |
| CentraState Medical Center Freehold Township, NJ · (732) 294-7012 C-Peptide File of Apr 1, 2026 · source file | $116.87 | $1,143.00 | — | 90% |
| The Mount Sinai Hospital New York, NY · (212) 241-7981 HC Cpeptide File of Apr 1, 2026 · source file | $117.00 | $130.00 | — | 10% |
| Mount Sinai Morningside New York, NY HC Cpeptide File of Apr 1, 2026 · source file | $117.00 | $130.00 | — | 10% |
| Mount Sinai Brooklyn Brooklyn, NY HC Cpeptide File of Apr 1, 2026 · source file | $117.00 | $130.00 | — | 10% |
| Mount Sinai Queens Long Island, NY HC Cpeptide File of Apr 1, 2026 · source file | $117.00 | $130.00 | — | 10% |
| Morristown Medical Center Morristown, NJ · (973) 971-5450 C-Peptide File of Apr 1, 2026 · source file | $127.97 | $1,718.00 | — | 93% |
| Montefiore Mount Vernon Hospital Mount Vernon, NY · (914) 664-8000 HC ASSAY OF C PEPTIDE File of Apr 1, 2026 · source file | $140.40 | $216.00 | $15.61–$225.27 | 35% |
| Nassau University Medical Center East Meadow, NY · (516) 572-0123 C-Peptide File of Oct 28, 2025 · source file | $140.86 | $201.22 | $8.52–$625.00 | 30% |
| Hudson Regional Hospital Secaucus, NJ · (201) 392-3200 C-peptide (protein) level File of Sep 23, 2026 · source file | $143.05 | $143.05 | $20.81–$269.94 | — |
| University Hospital of Brooklyn Brooklyn, NY · (718) 270-1000 84681 - ASSAY OF C-PEPTIDE File of Apr 22, 2025 · source file | $145.00 | $145.00 | $15.00–$54.00 | — |
| New York Community Hospital of Brooklyn Brooklyn, NY · (718) 692-5302 C-PEPTIDE File of Apr 1, 2026 · source file | $155.24 | $155.24 | — | — |
| Flushing Hospital Medical Center Flushing, NY · (718) 670-5000 C-PEPTIDE (PROTEIN) LEVEL File of Mar 25, 2026 · source file | $183.00 | $183.00 | $16.10–$1,912.00 | — |
| Jamaica Hospital Medical Center Jamaica, NY · (718) 262-6000 C-PEPTIDE (PROTEIN) LEVEL File of Mar 25, 2026 · source file | $183.00 | $183.00 | $16.10–$1,912.00 | — |
| Newton Medical Center Newton, NJ · (973) 383-2121 C-Peptide File of Apr 1, 2026 · source file | $191.06 | $2,194.00 | — | 91% |
| St Johns Riverside Hospital Park Care Pavillion Yonkers, NY · (914) 964-4444 ASSAY OF C-PEPTIDE File of Mar 27, 2026 · source file | $198.05 | $233.00 | $19.77–$3,783.00 | 15% |
| Englewood Health Englewood, NJ · (201) 894-3000 C-Peptide, Ultrasensitive (Endocrine Sciences) 84681 File of Feb 2, 2026 · source file | $208.00 | $2,080.00 | $162.66–$1,664.00 | 90% |
| Chilton Medical Center Pompton Plains, NJ · (973) 831-5000 C-Peptide File of Apr 1, 2026 · source file | $213.87 | $1,863.00 | — | 89% |
| St Johns Episcopal Hospital Far Rockaway, NY · (718) 869-7000 ASSAY OF C-PEPTIDE File of Apr 7, 2026 · source file | $223.71 | $223.71 | $19.77–$48.15 | — |
| Stony Brook Southampton Hospital Southampton, NY C-PEPTIDE (PROTEIN) LEVEL File of Jun 17, 2026 · source file | $241.41 | $241.41 | $20.81–$27.05 | — |
| Westchester Medical Center Valhalla, NY · (914) 493-7000 ASSAY OF C-PEPTIDE File of Jul 28, 2026 · source file | $250.00 | $250.00 | $14.57–$250.00 | — |
| Good Samaritan Hospital Suffern, NY · (914) 368-5000 C-Peptide, Serum LC File of Jun 29, 2026 · source file | $331.00 | $331.00 | $20.81–$981.58 | — |
| Stony Brook Southampton Hospital Southampton, NY ASSAY OF C-PEPTIDE File of Jun 17, 2026 · source file | $357.80 | $357.80 | $20.81–$27.05 | — |
| Brooklyn Hospital Center at Downtown Campus Brooklyn, NY · (718) 250-8000 C-PEPTIDE (PROTEIN) LEVEL File of Jul 27, 2026 · source file | $421.93 | $421.93 | $16.65–$41.62 | — |
| Memorial Hospital for Cancer and Allied Diseases New York, NY HC Assay of C-Peptide - C-Peptide File of Dec 1, 2025 · source file | $425.00 | $425.00 | $14.59–$382.50 | — |
| Memorial Hospital for Cancer and Allied Diseases Middletown, NJ HC Assay of C-Peptide - C-Peptide File of Dec 1, 2025 · source file | $425.00 | $425.00 | $65.09–$382.50 | — |
| Memorial Hospital for Cancer and Allied Diseases Basking Ridge, NJ HC Assay of C-Peptide - C-Peptide File of Dec 1, 2025 · source file | $425.00 | $425.00 | $65.09–$382.50 | — |
| Memorial Hospital for Cancer and Allied Diseases West Harrison, NY HC Assay of C-Peptide - C-Peptide File of Dec 1, 2025 · source file | $425.00 | $425.00 | $14.59–$382.50 | — |
| Stony Brook University Hospital Stony Brook, NY · (631) 444-4000 ASSAY OF C-PEPTIDE File of Jun 10, 2026 · source file | $425.00 | $425.00 | $20.81–$4,255.00 | — |
| Brooklyn Hospital Center at Downtown Campus Brooklyn, NY · (718) 250-8000 ASSAY OF C-PEPTIDE File of Jul 27, 2026 · source file | $483.07 | $483.07 | $16.65–$41.62 | — |
| Saint Peters University Hospital New Brunswick, NJ · (732) 745-8600 C-PEPTIDE File of Nov 19, 2025 · source file | $1,262.00 | $1,275.00 | $13.00–$1,275.00 | 1% |
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 $11.00, median $24.97, highest $1,262.00 — a 114.7× difference within the same market.
As an inpatient, the same code is billed by 29 facilities here, median $45.78. 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 46 of 55 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 2 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.
3 rows held back from this comparison
They are priced below $1 or below a tenth of the national median for code 84681 ($90.50). 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 |
|---|---|---|
| Brookdale Hospital Medical Center Brooklyn, NYQ-C-PEPTIDE | $0.01 | file |
| Kingsbrook Jewish Medical Center Brooklyn, NYQ-C-PEPTIDE | $0.01 | file |
| Interfaith Medical Center Brooklyn, NYQ-C-PEPTIDE | $0.01 | file |
File Link to the hospital's own price file.