C-peptide test cost in Riverside, CA
In Riverside-San Bernardino-Ontario, CA, 19 hospitals list a cash price for C-peptide blood test: from $10.00 to $185.00, with a median of $20.00. The lowest listed price is at Loma Linda University Behavioral Medicine Center and 3 other hospitals — $10.00 less than the median here. Across California, the median is $63.84 at 144 hospitals.
Cash prices at 19 facilities across 16 cities for code 84681, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 29, 2026; the hospital files themselves were last updated between Apr 1, 2026 and Sep 2, 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 Riverside-San Bernardino-Ontario, CA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Loma Linda University Behavioral Medicine Center lowest Redlands, CA HC SOM C-PEPTIDE File of Aug 31, 2026 · source file | $10.00 | $10.00 | $5.50–$20.81 | — |
| Loma Linda University Childrens Hospital lowest Loma Linda, CA · (909) 558-8000 HC SOM C-PEPTIDE File of Sep 2, 2026 · source file | $10.00 | $10.00 | $2.00–$175.04 | — |
| Loma Linda University Medical Center - Murrieta lowest Murrieta, CA · (951) 290-4000 HC SOM C-PEPTIDE File of Sep 2, 2026 · source file | $10.00 | $10.00 | $1.81–$161.02 | — |
| Loma Linda University Medical Center lowest Loma Linda, CA · (909) 558-4000 HC SOM C-PEPTIDE File of Sep 2, 2026 · source file | $10.00 | $10.00 | $2.00–$171.52 | — |
| Mountains Community Hospital Lake Arrowhead, CA · (909) 336-3651 C-PEPTIDE source file | $11.04 | $27.61 | $12.42–$23.47 | 60% |
| Menifee Global Medical Center Menifee, CA · (951) 679-8888 C-PEPTIDE - LC File of May 20, 2026 · source file | $12.00 | $12.00 | $5.40–$41.23 | — |
| Hemet Global Medical Center Hemet, CA · (951) 652-2811 C-PEPTIDE - LC File of Jun 15, 2026 · source file | $12.00 | $12.00 | $5.40–$41.23 | — |
| Palo Verde Hospital Blythe, CA · (760) 922-4115 C-Peptide LC File of Jul 1, 2026 · source file | $12.90 | $17.20 | — | 25% |
| Montclair Hospital Medical Center Montclair, CA · (909) 625-8300 Hc Assay Of C-Peptide File of Sep 1, 2026 · source file | $20.00 | $136.90 | $19.77–$136.90 | 85% |
| Chino Valley Medical Center Chino, CA · (909) 627-6111 Hc Assay Of C-Peptide File of Sep 1, 2026 · source file | $20.00 | $136.90 | $19.77–$136.90 | 85% |
| Desert Valley Hospital Victorville, CA · (760) 241-8000 C PEPTIDE LC 1 File of Sep 1, 2026 · source file | $20.00 | $68.67 | $20.46–$68.67 | 71% |
| St Mary Medical Center Apple Valley, CA · (760) 242-2311 HC ASSAY OF C-PEPTIDE CDM File of Apr 1, 2026 · source file | $30.36 | $63.25 | — | 52% |
| Victor Valley Global Medical Center Victorville, CA · (760) 245-8691 C-PEPTIDE File of May 13, 2026 · source file | $38.00 | $38.00 | $9.12–$49.00 | — |
| Riverside University Medical Center Moreno Valley, CA · (951) 486-4000 HC Qu C Peptide Any Method+1 more line at this price source file | $62.91 | $62.91 | $14.26–$62.91 | — |
| Hemet Global Medical Center Hemet, CA · (951) 652-2811 B-LAB C-PEPTIDE SERUM File of Jun 15, 2026 · source file | $71.00 | $71.00 | $17.83–$71.00 | — |
| Menifee Global Medical Center Menifee, CA · (951) 679-8888 B-LAB C-PEPTIDE SERUM File of May 20, 2026 · source file | $71.00 | $71.00 | $17.83–$71.00 | — |
| Kaiser Foundation Hospital - Riverside Riverside, CA · (951) 353-2000 ASSAY OF C-PEPTIDE source file | $121.16 | $233.00 | $15.00–$45.00 | 48% |
| Kaiser Foundation Hospital - Moreno Valley Moreno Valley, CA · (951) 251-6530 ASSAY OF C-PEPTIDE source file | $121.16 | $233.00 | $15.00–$45.00 | 48% |
| Kaiser Ontario Medical Center Campus Ontario, CA · (909) 427-5000 ASSAY OF C-PEPTIDE source file | $121.16 | $233.00 | $15.00–$45.00 | 48% |
| Kaiser Foundation Hospital - Fontana Fontana, CA · (909) 427-5000 ASSAY OF C-PEPTIDE source file | $121.16 | $233.00 | $15.00–$45.00 | 48% |
| San Antonio Regional Hospital Upland, CA · (909) 985-2811 C-peptide (protein) level File of Apr 2, 2026 · source file | $185.00 | $14.74 | $2.68–$201.00 | -1155% |
Outpatient: lowest $10.00, median $20.00, highest $185.00 — a 18.5× difference within the same market.
As an inpatient, the same code is billed by 14 facilities here, median $21.63. 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 12 of 17 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.
7 rows held back from this comparison
They are priced below $1 or below a tenth of the national median for code 84681 ($92.56). 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 |
|---|---|---|
| Eisenhower Medical Center Rancho Mirage, CAHC 372 - C-Peptide | $1.65 | file |
| St Bernardine Medical Center San Bernardino, CARL-A-C PEP 70103 | $2.67 | file |
| Community Hospital of San Bernardino San Bernardino, CARL-A-C PEP 70103 | $3.13 | file |
| Riverside Community Hospital Riverside, CAC-peptide | $3.65 | file |
| Riverside Community Hospital Riverside, CAC-PEPTIDE | $3.65 | file |
| Barstow Community Hospital Barstow, CAC-peptide (protein) level | $6.23 | file |
| Victor Valley Global Medical Center Victorville, CAC-PEPTIDE - LC | $8.00 | file |