Billing code 77763: Brachytherapy applicationMedicare rate & RVUs

Medicare pays $791.94 for 77763 nationally in the office. Local office rates run $714.39–$1,033.55.

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

What 77763 covers

This service covers complex placement of a radiation source within a body cavity for brachytherapy. A radiation oncologist typically performs the application, often in a hospital or other treatment setting. Gynecologic cancers involving sites such as the cervix or vagina are common clinical contexts for intracavitary treatment. The application is distinct from the subsequent delivery of radiation by a high-dose-rate remote afterloading system.

Choose this level when the documented application is complex rather than simple or intermediate; the record should support the treated site, the intracavitary approach, and the work involved in positioning the source or applicator. CMS assigns a 90-day global period, including the day-before preoperative visit and 90 days of related postoperative care. The service has professional and technical components: modifier 26 identifies interpretation, modifier TC identifies equipment and staff, and no modifier represents the global service. Modifier 50 is inappropriate for this service. An assistant is payable only when medical necessity is documented; co-surgeons and team surgery are not permitted.

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 77763 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

77763 rates by state

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

How the 77763 rate is calculated

Each of 77763’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 77763

77763 has a 90-day global period: related visits in that window are included in the surgery payment.

What modifiers do to the payment

When to use modifier 26

77763 compared with similar codes

How to choose

77761Intracavitary brachytherapy

Use 77761 for a simple intracavitary application. This code is for an application documented as complex.

77762Intracavitary radiation

Use 77762 for an intermediate intracavitary application; this code represents the complex level.

77778Interstitial brachytherapy

77778 describes complex interstitial source application, in which sources are placed within tissue; this code concerns intracavitary application.

77770HDR brachytherapy

77770 describes high-dose-rate remote afterloading treatment. This code represents complex intracavitary source application rather than that treatment service.

Codes related to 77763

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