Rheumatoid factor test cost in California

In California, 194 hospitals publish a cash price for rheumatoid factor (RF) test: from $2.91 to $1,217.00, with a median of $13.20. The lowest price is at Bakersfield Memorial Hospital (Bakersfield). The highest price is 418.2× the lowest.

• The median here, $13.20, is 67% below the US median of $40.48.
• That is 2.3× Medicare's 2026 national rate for the same service ($5.67).
• California ranks 2nd of 50 states by median, cheapest first.
• 56 of 194 hospitals list a cash price equal to their full list price, with no self-pay discount.

California law (Health and Safety Code §127405): if you are uninsured or have high medical costs and your family income is at or below 400% of the federal poverty level, a hospital may not expect you to pay more than it would expect from Medicare or Medi-Cal, whichever is greater. That can be less than the cash prices below; ask the hospital for its discount payment policy. A separate physician fee may still apply. Other states' laws.

Outpatient cash prices, one line per hospital — its lowest listed price for code 86431. Prices for both sides of the body and inpatient prices are not mixed in. Collected Nov 8, 2026. See them on a map