MLN BookletHow to Use the PFS Look-Up Tool
MLN901344 April 2023Page 4 of 34
What is the PFS Look-Up Tool?
The CMS PFS Look-Up Tool gives Medicare payment
information on more than 10,000 services, including:
● Pricing
● Associated RVUs
● Payment policies
The tool doesn’t display carrier priced codes or
Medicare Part B non-payable codes.
Why Would a Health Care Provider or
Supplier Use the PFS Look-Up Tool?
The PFS is the primary method of payment for
enrolled health care providers. Specically, Medicare
uses the PFS when paying the following services:
● Professional services of physicians and other
enrolled health care providers in private practice
● Services covered incident to physicians’ services
(Other than certain drugs covered as incident to
services)
● Diagnostic tests (Other than clinical laboratory
tests)
● Radiology services
Medicare also pays suppliers like mammography
centers, according to the PFS. Medicare pays
institutional providers like hospitals, comprehensive
outpatient rehabilitation facilities (CORFs), and skilled
nursing facilities (SNFs) for services under the PFS,
depending on the kind of institution and service.
For example, Medicare pays hospital outpatient
departments for screening mammographies and
outpatient rehabilitation services under the PFS.
The PFS Look-Up Tool helps providers and suppliers
nd Medicare payment amounts for each code so
they can calculate the patient coinsurance amount.
The PFS gives the limiting charge for nonparticipating
providers and suppliers who treat Medicare patients.
Participating Medicare Providers and
Suppliers enroll in Medicare and sign the
Form CMS-460, Medicare Participating
Physician or Supplier Agreement, agreeing
to charge no more than Medicare-approved
amounts and deductibles and coinsurance
amounts. Participating providers and suppliers
send in assigned claims.
Providers and suppliers send in Assigned
Claims on behalf of the patient. Medicare
issues payment to the sender.
Nonparticipating Providers and Suppliers
who enroll in Medicare but decide not to sign
the Form CMS-460 accept assignment on a
case-by-case basis.
Medicare reduces the Medicare-approved
amounts for nonparticipants by 5% for services
paid under the PFS. Also, Medicare limits what
you or the supplier may charge the patient
(Limiting Charge) when you choose not to
accept assignment on the claim.
Limiting Charge equals 115% of the
nonparticipating fee schedule amount and
is the most the nonparticipant may charge
a patient on an unassigned claim. The
nonparticipating fee schedule amount is equal
to 95% of the PFS.
Nonparticipating providers or suppliers who
don’t accept the assignment on the claim,
send in Unassigned Claims. Medicare issues
payment to the patient. Use the PFS Look-
Up Tool to learn if payment policies such as
payment of assistant at surgery services,
applicability of certain modiers, and physician
supervision of diagnostic services affect
HCPCS codes.