CPT code 77063: Screening breast tomosynthesis, bilateral screening add-on2026 Medicare rate & RVUs in California

Medicare pays $53.89–$66.24 for 77063 in the office in California, from Chico, CA to San Benito County, CA. Which amount applies depends on the service address.

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

What 77063 covers

This service adds tomosynthesis images of both breasts to a screening mammogram. An x-ray tube moves across each compressed breast, and the acquired images are reconstructed into thin slices that help the radiologist assess overlapping tissue. A mammography technologist obtains the images in a hospital outpatient department, freestanding imaging center, or mobile mammography unit. The radiologist interprets the tomosynthesis images alongside the screening mammogram’s standard or synthesized two-dimensional images.

Report 77063 once with bilateral screening mammography code 77067 when tomosynthesis of both breasts is performed and interpreted; it cannot be reported alone. The report should document bilateral tomosynthesis and its interpretation. As an add-on, 77063 is paid within the primary procedure’s global period. Its price already accounts for both breasts, so modifier 50 does not increase payment. Modifier 26 identifies the radiologist’s interpretation, modifier TC identifies the equipment and staff portion, and an unmodified claim represents the global service. For Medicare diagnostic tomosynthesis, use G0279 with the applicable diagnostic mammography code instead.

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 77063 pays more and less in California

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

29 of 29 payment localities

How the 77063 rate is calculated

Each of 77063’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 77063

The CMS indicators that decide how 77063 is paid alongside other services.

What modifiers do to the payment

When to use modifier 26

77063 compared with similar codes

How to choose

77062Breast tomosynthesisDiagnostic, bilateral

77062 is bilateral diagnostic tomosynthesis. 77063 is limited to screening and is paired with 77067. For Medicare diagnostic tomosynthesis, report G0279 instead.

G0279Diagnostic breast tomosynthesisAdd-on to diagnostic mammography

G0279 is Medicare’s tomosynthesis add-on for diagnostic mammograms reported with 77065 or 77066. Use 77063 when bilateral tomosynthesis accompanies a screening mammogram.

77067Screening mammogramBilateral, CAD included

77067 reports bilateral screening mammography and is the required primary code. Add 77063 when bilateral screening tomosynthesis images are also acquired and interpreted.

77061Breast tomosynthesisUnilateral diagnostic

77061 describes diagnostic tomosynthesis of one breast. 77063 covers tomosynthesis of both breasts with a screening mammogram.

Codes related to 77063

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