Prothrombin time (PT/INR) clotting test in Houston-Pasadena-The Woodlands, TX — inpatient
In Houston-Pasadena-The Woodlands, TX, 12 hospitals list a cash price for Prothrombin time (PT/INR) clotting test as an inpatient: from $4.29 to $137.50, with a median of $106.53. The lowest listed price is at Harris Health.
Cash prices at 12 facilities across 8 cities for code 85610, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Mar 5, 2026 and Apr 1, 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 Houston-Pasadena-The Woodlands, TX.
Hospitals, cheapest first
| Hospital | Cash price | List price | Off list | File date |
|---|---|---|---|---|
| Harris Health lowest Houston, TX COAG PROTHROMBIN | $4.29 | $19.00 | 77% | — source file |
| Harris Health Taub Loop Houston, TX COAG PROTHROMBIN | $4.29 | $19.00 | 77% | — source file |
| Harris Health Houston, TX PROTHROMBIN TIME (POCPT) | $4.29 | $19.00 | 77% | — source file |
| Harris Health Taub Loop Houston, TX PROTHROMBIN TIME (POCPT) | $4.29 | $19.00 | 77% | — source file |
| Texas Children's Hospital Houston, TX TC INR WHOLE BLOOD; PROTHROMBIN TIME | $77.05 | $115.00 | 33% | Mar 5, 2026 source file |
| Texas Children's Hospital Houston, TX TC INR WHOLE BLOOD; PROTHROMBIN TIME | $77.05 | $115.00 | 33% | Mar 5, 2026 source file |
| Texas Children's Hospital Houston, TX TC INR WHOLE BLOOD; PROTHROMBIN TIME | $77.05 | $115.00 | 33% | Mar 5, 2026 source file |
| Texas Children's Hospital Houston, TX TC PROTHROMBIN TIME | $99.16 | $148.00 | 33% | Mar 5, 2026 source file |
| Texas Children's Hospital Houston, TX TC PROTHROMBIN TIME | $99.16 | $148.00 | 33% | Mar 5, 2026 source file |
| Texas Children's Hospital Houston, TX TC PROTHROMBIN TIME | $99.16 | $148.00 | 33% | Mar 5, 2026 source file |
| Texas Children's Hospital Houston, TX TC PROTHROMBIN TIME - LAB | $106.53 | $159.00 | 33% | Mar 5, 2026 source file |
| Texas Children's Hospital Houston, TX TC PROTHROMBIN TIME - LAB | $106.53 | $159.00 | 33% | Mar 5, 2026 source file |
| Texas Children's Hospital Houston, TX TC PROTHROMBIN TIME - LAB | $106.53 | $159.00 | 33% | Mar 5, 2026 source file |
| Houston Methodist Baytown Hospital Baytown, TX HC PROTHROMBIN TIME PT | $134.50 | $269.00 | 50% | Apr 1, 2026 source file |
| Methodist Sugar Land Hospital Sugar Land, TX HC PROTHROMBIN TIME PT | $134.50 | $269.00 | 50% | Apr 1, 2026 source file |
| Methodist West Houston Hospital Houston, TX HC PROTHROMBIN TIME PT | $134.50 | $269.00 | 50% | Apr 1, 2026 source file |
| Methodist Willowbrook Hospital Houston, TX HC PROTHROMBIN TIME PT | $134.50 | $269.00 | 50% | Apr 1, 2026 source file |
| Houston Methodist The Woodlands Hospital The Woodlands, TX HC PROTHROMBIN TIME PT | $134.50 | $269.00 | 50% | Apr 1, 2026 source file |
| Houston Methodist Continuing Care Hospital Katy, TX HC PROTHROMBIN TIME PT | $134.50 | $269.00 | 50% | Apr 1, 2026 source file |
| Houston Methodist Clear Lake Hospital Nassau Bay, TX HC PROTHROMBIN TIME PT | $134.50 | $269.00 | 50% | Apr 1, 2026 source file |
| Houston Methodist Cypress Hospital Cypress, TX HC PROTHROMBIN TIME PT | $134.50 | $269.00 | 50% | Apr 1, 2026 source file |
| The Methodist Hospital Houston, TX HC PROTHROMBIN TIME PT | $137.50 | $275.00 | 50% | Apr 1, 2026 source file |
Inpatient: lowest $4.29, median $106.53, highest $137.50 — a 32.1× difference within the same market.
As an outpatient, the same code is billed by 14 facilities here, median $99.16 — that is the price to compare if you are not being admitted.
What it is
The prothrombin time (PT) test measures how long it takes blood to clot, and is reported with the INR, a standardized number. It is used to monitor warfarin and to check clotting before surgery or with liver disease.
What the price covers
The price usually covers the PT and INR result. The blood draw is often a separate charge; a fingerstick home or clinic INR check may be billed differently.