CPT code 73564: Knee X-ray, four or more views, one knee2026 Medicare rate & RVUs

Medicare pays $49.43 for 73564 nationally in the office. Local office rates run $43.22–$68.35.

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

What 73564 covers

This study obtains four or more distinct radiographic views of one knee. A series may combine AP and lateral views with oblique, tangential patellar, tunnel, or standing weight-bearing views. Orthopedic, sports medicine, and primary care clinicians order these images to evaluate osteoarthritis, fractures, patellar alignment, or knee replacement position. Technologists acquire the images in physician offices, imaging centers, and hospital outpatient departments; a radiologist or treating physician interprets them.

Select the code by counting distinct views obtained of each knee. The imaging record should identify the views or their number; a label such as “complete knee” alone does not establish the count. One or two views are reported with 73560, and three with 73562. Modifier 26 identifies the separately billed interpretation and report, while modifier TC identifies the separately billed imaging equipment, staff, and supplies. Billing without either modifier represents the global service. When four or more views are obtained of both knees, count and report each knee separately; CMS pays each side at 100% when performed bilaterally.

This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.

Where 73564 pays more and less

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 of 109 payment localities

73564 rates by state

Office rate range in each state. Select a state to see its payment localities.

How the 73564 rate is calculated

Each of 73564’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.

Payment rules and modifiers for 73564

The CMS indicators that decide how 73564 is paid alongside other services.

What modifiers do to the payment

When to use modifier 26

73564 compared with similar codes

How to choose

73562Knee X-rayThree views, one knee

73562 covers exactly three views of one knee. If four or more distinct projections are obtained, use 73564.

73560Knee X-rayOne or two views

73560 covers one or two views of a knee. Four or more documented views of that knee support 73564.

73565Knee X-rayBilateral standing AP

73565 covers standing AP imaging of both knees. 73564 covers four or more distinct views of a knee, reported for each knee imaged.

73580Knee arthrographyRadiographic contrast study

73580 covers radiologic supervision and interpretation of knee arthrography using intra-articular contrast. 73564 covers a plain radiographic knee study with four or more views.

Codes related to 73564

Related codes aren’t interchangeable: bill the code that matches the service performed.

Where these rates come from

FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.

CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027

Open CMS sourceHow we calculate rates