Lab tests CPT 84436 Inpatient — admitted to hospital

Total T4 test cost in San Andreas, CA — inpatient

In San Andreas, CA, 1 hospital lists a cash price for total thyroxine (T4) blood test as an inpatient: from $11.45 to $11.45, with a median of $11.45. Across California, the median is $39.20 at 185 hospitals.

Cash prices at 1 facility for code 84436, as an inpatient (admitted to hospital) . Collected Sep 27, 2026; the hospital files themselves were last updated between Feb 28, 2026 and Feb 28, 2026.

Lowest$11.45Mark Twain Medical Center

Median$11.45half of hospitals charge less

Highest$11.45in this market

Difference1.0×highest vs lowest

Hospitals, cheapest first

Hospital	Cash price	List price	Insurers pay	Off list
Mark Twain Medical Center San Andreas, CA · (209) 754-3521 THYROXINE TOTAL File of Feb 28, 2026 · source file	$11.45	$17.18	$9.30–$16.84	33%

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.

Inpatient: lowest $11.45, median $11.45, highest $11.45.

As an outpatient, the same code is billed by 1 facility here, median $11.45 — that is the price to compare if you are not being admitted.

Cash or insurance?

At the one hospital here that publishes insurer rates for this code, the cash price is below the highest rate a health plan has negotiated. 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.

2 rows held back from this comparison

They are priced below $1 or below a tenth of the national median for code 84436 ($52.00). 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
Mark Twain Medical Center San Andreas, CARL-A-FTIP 3005976B	$4.35	file
Mark Twain Medical Center San Andreas, CARL-A-T4 TOTAL 3005978	$4.71	file

File Link to the hospital's own price file.