CPT code 77772: HDR brachytherapy2026 Medicare rate & RVUs in Massachusetts
Reports complex high-dose-rate brachytherapy delivered through interstitial or intracavitary applicators when treatment uses more than 12 channels.
Medicare pays $953.49–$1,061.44 for 77772 in the office in Massachusetts, from Rest Of Massachusetts to Metropolitan Boston. 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.
On this page 9 sections
What 77772 covers
A radiation oncologist uses a remotely afterloaded radioactive source with catheters or an intracavitary applicator to deliver high-dose-rate treatment to a defined target. Common settings include hospital radiation oncology departments and outpatient cancer centers; treatment sites can include the cervix or prostate. This level is distinguished by treatment involving more than 12 channels. Basic dosimetry is included when performed.
Select this code when the documented channel count supports the complex level, rather than the lower channel-count levels. Records should identify the treatment site, applicator or catheter arrangement, channel count, and delivered treatment. CMS lists separately priced professional and technical components: modifier 26 identifies the professional interpretation, while modifier TC identifies equipment and staff; without either modifier, the code represents the global service.
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 77772 pays more and less in Massachusetts
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Boston | $1,061.44 | Unavailable |
| Rest Of Massachusetts | $953.49 | Unavailable |
How the 77772 rate is calculated
Each of 77772’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.
How the rate is built · 77772
RVUs × geographic indexes × conversion factor
Work5.27
5.27 RVUs× 1.000 GPCI
Practice expense21.73
21.73 RVUs× 1.000 GPCI
Malpractice0.39
0.39 RVUs× 1.000 GPCI
Adjusted RVUs
27.3900
Conversion factor
$33.4009
Medicare rate
$914.85
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 77772
The CMS indicators that decide how 77772 is paid alongside other services.
CMS payment indicators · 77772
HDR brachytherapy
| Rule | CMS value | What it means |
|---|---|---|
| Global period | XXX | The global surgery concept doesn’t apply. |
| Multiple procedures | 0 | No multiple-procedure reduction. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 0 | Not paid without supporting documentation. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 1 | Diagnostic test with separate professional (26) and technical (TC) components. |
What modifiers do to the payment
Modifier 26 · payment effect
With and without the modifier
77772 without 26 · national office
$914.85
HDR brachytherapy
77772-26 · Professional component
$280.90
Pays only the interpretation and report.
77772 compared with similar codes
Compare codes · National
5 codes, side by side
How to choose
- 77770HDR brachytherapy
- Both cover HDR interstitial or intracavitary brachytherapy. Use 77772 when treatment involves more than 12 channels; 77770 is the lower channel-count level.
- 77771HDR brachytherapy
- Both are in the HDR interstitial or intracavitary family. The channel count must support the complex level for 77772 rather than the intermediate level represented by 77771.
- 77767Skin brachytherapy
- 77767 is for HDR brachytherapy delivered to a skin surface. Use 77772 for interstitial or intracavitary treatment involving more than 12 channels.
- 77778Interstitial brachytherapy
- 77778 describes complex interstitial radiation application, while 77772 is the complex HDR interstitial or intracavitary treatment level selected by channel count.
77772 billing questions
How is this code distinguished from 77770 and 77771?
The channel count determines the level: 77772 is for treatment involving more than 12 channels. The lower codes cover fewer channels.
Can basic dosimetry be billed separately?
Basic dosimetry is included when performed as part of this service. The code covers complex HDR interstitial or intracavitary treatment, not a separate dosimetry-only service.
When should modifier 26 or TC be used?
CMS identifies modifier 26 for the professional interpretation and TC for the technical equipment and staff component. Report the code without either modifier for the global service.
What documentation supports the complex level?
Document the treatment site, applicator or catheter configuration, channel count, and treatment delivered. The record should support use of more than 12 channels.
Is this the right code for HDR treatment of a skin surface site?
No. This code is for interstitial or intracavitary treatment; HDR skin-surface treatment is represented by a different code family, including 77767 and 77768.
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
Show the CMS file lines behind this rate
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