Independent Diagnostic Testing Facility (IDTF)

Key facts

Legal basis

42 CFR 410.33

Medicare enrollment

Form CMS-855B, with a site visit

Supervision

Supervising physicians at the level each test requires under 42 CFR 410.32

Payment

Medicare Physician Fee Schedule, global or technical component

Operating models

Fixed locations, mobile units or both

What is an IDTF?

An IDTF performs diagnostic tests ordered by a patient's treating physician or practitioner without being part of a hospital or of a physician practice that bills the tests itself. Examples include freestanding imaging centers, independent sleep testing companies, cardiac event monitoring services and mobile x-ray or ultrasound providers that serve nursing homes.

The category exists for Medicare enrollment and billing. A physician group that performs imaging for its own patients generally bills as a group practice, not as an IDTF, and a hospital imaging department bills under the hospital.

At enrollment, an IDTF lists the tests it performs, its supervising physicians and each fixed location or mobile unit. It must report later changes in ownership, location or supervising physicians to its Medicare contractor.

How IDTF rules work

Medicare requires IDTFs to meet performance standards in 42 CFR 410.33, including:

Tests are billed globally or split into a technical component, for performing the test, and a professional component, for the physician interpretation.

• Supervising physicians qualified for each type of test, providing the general, direct or personal supervision that the test requires.
• Nonphysician staff who perform tests holding the state licensure or certification the test calls for.
• Tests ordered in writing by the treating physician or practitioner.
• Comprehensive liability insurance, posting of the performance standards for patients and a documented process for handling beneficiary complaints.

Why IDTFs matter

IDTFs are a significant but often overlooked diagnostic channel:

• Imaging and cardiac monitoring volume shifts among hospitals, physician offices and IDTFs, and the setting affects both price and ordering patterns.
• Medicare screens newly enrolling IDTFs as a high program integrity risk, so enrollment status and revocations are standard due diligence checks.
• Contrast agent, radiopharmaceutical and imaging equipment companies target IDTFs alongside hospital imaging departments.