How is the partial thromboplastin time test usually paid for?

The CPT code for a partial thromboplastin time (PTT) test is 85732. This code is usually billed with a modifier, such as -26 (professional component) or -TC (technical component), to indicate who performed the test. The Medicare fee schedule for a PTT test with a -26 modifier is $14.50. The fee schedule for a PTT test with a -TC modifier is $8.00.

PTT is usually paid for under the "laboratory" section of a health plan's benefits schedule. Some plans may have a separate deductible or copayment for laboratory services. Patients should check with their health plan to determine their coverage for PTT tests.