Total T4 test cost in Riverside, CA
In Riverside-San Bernardino-Ontario, CA, 21 hospitals list a cash price for total thyroxine (T4) blood test: from $6.00 to $740.75, with a median of $14.50. The lowest listed price is at Montclair Hospital Medical Center and 2 other hospitals — $8.50 less than the median here. Across California, the median is $39.20 at 183 hospitals.
Cash prices at 21 facilities across 16 cities for code 84436, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 29, 2026; the hospital files themselves were last updated between Feb 28, 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 | File date |
|---|---|---|---|---|---|
| Montclair Hospital Medical Center lowest Montclair, CA · (909) 625-8300 Hc Assay Of Total Thyroxine | $6.00 | $259.88 | $5.94–$259.88 | 98% | Sep 1, 2026 source file |
| Desert Valley Hospital lowest Victorville, CA · (760) 241-8000 THYROXINE (T-4) TOTAL LC 1 | $6.00 | $22.67 | $5.94–$37.79 | 74% | Sep 1, 2026 source file |
| Chino Valley Medical Center lowest Chino, CA · (909) 627-6111 Hc Assay Of Total Thyroxine | $6.00 | $259.88 | $5.94–$259.88 | 98% | Sep 1, 2026 source file |
| Desert Valley Hospital lowest Victorville, CA · (760) 241-8000 T4 LC | $6.00 | $37.79 | $5.94–$37.79 | 84% | Sep 1, 2026 source file |
| St Bernardine Medical Center San Bernardino, CA · (909) 883-8711 NH-THYROXINE TOTAL | $7.33 | $22.00 | $5.72–$37.15 | 67% | Feb 28, 2026 source file |
| Community Hospital of San Bernardino San Bernardino, CA · (909) 887-6333 NH-THYROXINE TOTAL | $8.06 | $20.61 | $4.13–$37.15 | 61% | Feb 28, 2026 source file |
| Mountains Community Hospital Lake Arrowhead, CA · (909) 336-3651 THYROID PAN W/TSH 3RD GEN | $8.60 | $21.49 | $9.67–$18.27 | 60% | — source file |
| Loma Linda University Childrens Hospital Loma Linda, CA · (909) 558-8000 HC SOM THYROXIN TOTAL | $9.84 | $9.84 | $1.97–$70.95 | — | Sep 2, 2026 source file |
| Loma Linda University Medical Center - Murrieta Murrieta, CA · (951) 290-4000 HC SOM THYROXIN TOTAL | $9.84 | $9.84 | $1.78–$65.26 | — | Sep 2, 2026 source file |
| Loma Linda University Medical Center Loma Linda, CA · (909) 558-4000 HC SOM THYROXIN TOTAL | $9.84 | $9.84 | $1.97–$69.52 | — | Sep 2, 2026 source file |
| Loma Linda University Behavioral Medicine Center Redlands, CA HC SOM THYROXIN TOTAL | $9.84 | $9.84 | $5.41–$7.87 | — | Aug 31, 2026 source file |
| St Mary Medical Center Apple Valley, CA · (760) 242-2311 HC THYROXINE T4 | $14.50 | $30.20 | — | 52% | Apr 1, 2026 source file |
| San Gorgonio Memorial Hospital Banning, CA · (951) 769-2101 THYROXINE (THYROID CHEMICAL); TOTAL | $18.55 | $92.75 | $6.53–$92.75 | 80% | — source file |
| San Gorgonio Memorial Hospital Banning, CA · (951) 769-2101 ASSAY OF TOTAL THYROXINE | $19.20 | $96.00 | $6.53–$96.00 | 80% | — source file |
| Bear Valley Community Hospital Big Bear Lake, CA · (909) 866-6501 T4 TOTAL | $19.78 | $28.26 | $6.53–$24.02 | 30% | — source file |
| St Bernardine Medical Center San Bernardino, CA · (909) 883-8711 THYROXINE TOTAL | $22.98 | $69.00 | $5.91–$69.00 | 67% | Feb 28, 2026 source file |
| Kaiser Foundation Hospital - Riverside Riverside, CA · (951) 353-2000 ASSAY OF THYROXINE TOTAL | $24.96 | $48.00 | $5.00–$15.00 | 48% | — source file |
| Kaiser Foundation Hospital - Fontana Fontana, CA · (909) 427-5000 ASSAY OF THYROXINE TOTAL | $24.96 | $48.00 | $5.00–$15.00 | 48% | — source file |
| Kaiser Foundation Hospital - Moreno Valley Moreno Valley, CA · (951) 251-6530 ASSAY OF THYROXINE TOTAL | $24.96 | $48.00 | $5.00–$15.00 | 48% | — source file |
| Community Hospital of San Bernardino San Bernardino, CA · (909) 887-6333 THYROXINE TOTAL | $26.98 | $69.00 | $6.87–$69.00 | 61% | Feb 28, 2026 source file |
| Victor Valley Global Medical Center Victorville, CA · (760) 245-8691 T4 TOTAL | $50.00 | $50.00 | $4.20–$50.00 | — | May 13, 2026 source file |
| Loma Linda University Medical Center Loma Linda, CA · (909) 558-4000 HC THYROXIN T4 | $68.85 | $153.00 | $5.56–$137.70 | 55% | Sep 2, 2026 source file |
| Loma Linda University Behavioral Medicine Center Redlands, CA HC THYROXIN T4 | $68.85 | $153.00 | $6.87–$122.40 | 55% | Aug 31, 2026 source file |
| Loma Linda University Medical Center - Murrieta Murrieta, CA · (951) 290-4000 HC THYROXIN T4 | $68.85 | $153.00 | $6.87–$114.75 | 55% | Sep 2, 2026 source file |
| Loma Linda University Childrens Hospital Loma Linda, CA · (909) 558-8000 HC THYROXIN T4 | $68.85 | $153.00 | $5.56–$130.05 | 55% | Sep 2, 2026 source file |
| Palo Verde Hospital Blythe, CA · (760) 922-4115 T4, Total | $78.75 | $105.00 | — | 25% | Jul 1, 2026 source file |
| Palo Verde Hospital Blythe, CA · (760) 922-4115 T3 Uptake | $81.00 | $108.00 | — | 25% | Jul 1, 2026 source file |
| San Antonio Regional Hospital Upland, CA · (909) 985-2811 Thyroxine (thyroid chemical), total | $185.00 | $34.17 | $2.35–$201.00 | -441% | Apr 2, 2026 source file |
| Riverside University Medical Center Moreno Valley, CA · (951) 486-4000 HC Thyroxine Total | $498.93 | $498.93 | $4.82–$498.93 | — | — source file |
| Riverside University Medical Center Moreno Valley, CA · (951) 486-4000 HC Thyroxine Total | $498.93 | $498.93 | $4.82–$498.93 | — | — source file |
| Riverside Community Hospital Riverside, CA · (951) 788-3000 THYROXINE T4 TOTAL | $740.75 | $740.75 | $111.11–$666.67 | — | Sep 1, 2026 source file |
Outpatient: lowest $6.00, median $14.50, highest $740.75 — a 123.5× difference within the same market.
As an inpatient, the same code is billed by 14 facilities here, median $17.14. 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 19 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 total T4 test measures all the thyroxine hormone in the blood, both bound and free. Most doctors now order free T4 (84439) instead, which is less affected by pregnancy and medicines.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.
10 rows held back from this comparison
They are priced below $1 or below a tenth of the national median for code 84436 ($52.65). 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.
| St Mary Medical Center Apple Valley, CAHC ASSAY OF THYROXINE TOTAL LAB | $2.10 | file |
| Eisenhower Medical Center Rancho Mirage, CAHC 90394 - Free Thyroxine Index (Fti), 84436 | $2.15 | file |
| St Bernardine Medical Center San Bernardino, CARL-A-T4 TOTAL 3005978 | $2.36 | file |
| Riverside University Medical Center Moreno Valley, CAHC Lab Ref T4 Thyroxine Total | $2.57 | file |
| Riverside University Medical Center Moreno Valley, CAHC Lab Ref T4 Thyroxine Total | $2.57 | file |
| Community Hospital of San Bernardino San Bernardino, CARL-A-T4 TOTAL 3005978 | $2.77 | file |
| Barstow Community Hospital Barstow, CAThyroxine (thyroid chemical), total | $2.86 | file |
| Eisenhower Medical Center Rancho Mirage, CAHC Frtup - Thyroxine Total | $3.40 | file |
| Eisenhower Medical Center Rancho Mirage, CAHC T4 Total | $3.40 | file |
| Mountains Community Hospital Lake Arrowhead, CAT4, TOTAL | $3.60 | file |