CPT 0431U

Immunoassay

Current code29 hospitals with prices

This name is the CMS category the code belongs to (CMS's Restructured BETOS Classification System), shared with similar codes. The official CPT description belongs to the American Medical Association and isn't shown.

What Washington hospitals publish for this code

Unknown: The source file doesn't say which population this rate applies to.

Prices for CPT 0431U by hospital
Hospital	Unknown rates (lowest – highest)	Cash price	List price (before discounts)
Capital Medical CenterOlympiaFile dated 2026-08-27	—	$81.60	$204
Deaconess Medical CenterSpokaneFile dated 2026-08-27	—	$108	$271
EvergreenHealth Medical CenterKirkland	$38.70 – $5281 plan	$34.40 – $470	$43.00 – $587
EvergreenHealth MonroeMonroe	$128 – $5079 plans	$470	$587
Mary Bridge Children's HospitalTacomaFile dated 2026-08-27	—	$102	$255
MultiCare Auburn Medical CenterAuburnFile dated 2026-08-27	—	$102	$255
MultiCare Covington Medical CenterCovingtonFile dated 2026-08-27	—	$102	$255
MultiCare Good Samaritan HospitalPuyallupFile dated 2026-08-27	—	$102	$255
MultiCare Valley HospitalSpokane ValleyFile dated 2026-08-27	—	$108	$271
Tacoma General Allenmore HospitalTacomaFile dated 2026-08-27	—	$102	$255
Yakima Valley MemorialYakimaFile dated 2026-08-27	—	$81.60	$204

Lowest and highest amounts each hospital lists for this code during a hospital stay, including lines it lists for both settings or without saying which. A doctor’s fee is shown separately when the hospital lists one with the code. “At least” means plans were counted in more than one group and some may be the same plan. This is one line of a bill; most care brings several.

Medicare (traditional) reference

Only for people on original Medicare. These are CMS’s 2026 amounts. They aren’t what private insurance or cash patients pay.

Lab fee schedule (national limit): $36.57

How hospitals also write this code

Some price files write it differently. These are counted as CPT 0431U:

431U (leading zeros left off; 79 price lines)