$373.24
Both describe HDR interstitial or intracavitary delivery, but 77770 is the simple level. Choose between them using the documented complexity and CPT criteria.
On this page
CMS RVU26D · Effective 2026-10-01
77771 HDR brachytherapy Medicare reimbursement rates in Connecticut
Reports intermediate-complexity high-dose-rate brachytherapy delivery through interstitial catheters or an intracavitary applicator for a treatment session. Compare 77771 office and facility rates across CMS payment localities in Connecticut.
Amounts below use the non-QP conversion factor for participating physicians. These are base physician payments before claim-level adjustments, not patient costs or total hospital charges.
What does Medicare pay for 77771 in Connecticut?
Connecticut has 1 payment locality in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the payment area shown below, using the same CMS release.
Office / nonfacility
$652.08
1 of 1 localities have a supported rate.
Payment area: Connecticut
One mapped payment locality.
Facility setting
No supported rate
These are locality ranges, not averages or address-specific quotes. A facility-setting amount covers the physician service; it does not include a hospital’s separate bill. Choose a locality below to inspect its calculation, compare other payment areas, or price a percentage of Medicare.
Radiation oncology
About 77771: Intermediate-complexity HDR brachytherapy delivery
Reports intermediate-complexity high-dose-rate brachytherapy delivery through interstitial catheters or an intracavitary applicator for a treatment session.
A radiation oncologist uses a remote afterloader to send a temporary high-dose-rate radioactive source through interstitial catheters or an intracavitary applicator. The source delivers radiation at planned positions and is withdrawn after treatment. Common clinical settings include gynecologic brachytherapy using an intracavitary applicator and interstitial treatment using implanted catheters. This code identifies the intermediate-complexity level of HDR delivery, rather than superficial skin treatment or permanent source implantation.
Select the intermediate level using the documented complexity of the delivery and the applicable CPT criteria; do not assign it solely from the treatment site or fraction count. The record should support the applicator or catheter arrangement, treatment delivery, and level selected. The service covers management of the HDR source as part of delivery. CMS lists separately priced professional and technical components: modifier 26 identifies the professional interpretation, modifier TC identifies equipment and staff, and billing without either modifier represents the global service.
CMS billing rules for 77771
- Professional and technical components
- Diagnostic test with a professional component (modifier 26, interpretation) and a technical component (modifier TC, equipment and staff); billing without a modifier is the global service.
Where the value comes from
- Work RVU3.71 · 20%
- Practice expense (office) RVU14.31 · 78%
- Malpractice RVU0.27 · 1%
7.5K
Medicare services in 2024 · #1620 by national volume
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.
77771 compared with similar codes
Office rates for Connecticut, from the same CMS release.
$976.99
Both describe HDR interstitial or intracavitary delivery, but 77772 is the complex level. The treatment site alone does not establish which level applies.
$268.61
77767 is for superficial-skin HDR brachytherapy. Use 77771 when the source is delivered through interstitial catheters or an intracavitary applicator.
Compare 77771 by payment locality
Find the payment area for your service address, then open its rate page for calculation inputs, release history and the percentage-of-Medicare tool. A city may cross payment-area boundaries; the ZIP lookup above helps resolve the location.
1 of 1 payment localities
Connecticut →
Office / nonfacility
$652.08
Facility
Unavailable
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How this local rate is calculated
Each RVU component is multiplied by its own geographic practice cost index (GPCI). The three adjusted components are added, then multiplied by the conversion factor. These are the inputs used for 77771 in Connecticut.
PPRRVU2026_Oct_nonQPP.csv
9,163
- Code
- 77771
- Physician work
- 3.71
- Practice expense
- 14.31
- Malpractice
- 0.27
GPCI2026.csv
38
- Locality
- Connecticut
- Physician work
- 1.020
- Practice expense
- 1.077
- Malpractice
- 1.210
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 3.71 | × 1.020 | 3.7842 |
| Practice expense | 14.31 | × 1.077 | 15.4119 |
| Malpractice | 0.27 | × 1.210 | 0.3267 |
| Total RVUs | 19.5228 | ||
| Conversion factor | × 33.4009 | ||
Office / nonfacility rate, Connecticut$652.08
Explore RVUs, geographic factors and the full formula
Office / nonfacility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 3.71 | 1.02 |
| Practice expense | 14.31 | 1.077 |
| Malpractice | 0.27 | 1.21 |
(3.71 × 1.02 + 14.31 × 1.077 + 0.27 × 1.21) × $33.4009 = $652.08
The office and facility calculations use their respective practice-expense RVUs. The facility amount here is the physician fee, not a separate hospital or facility bill.
77771 billing questions
How does 77771 differ from 77770 and 77772?
These codes distinguish simple, intermediate, and complex HDR interstitial or intracavitary delivery. Use the level supported by the documented delivery complexity and CPT criteria, not an assumption based only on site.
Is 77771 reported per fraction?
The code covers delivery for one or more fractions. Follow the applicable CPT reporting instructions and document the treatment delivered; do not infer a separate unit for every fraction.
When should modifier 26 or TC be used?
Modifier 26 identifies the professional interpretation component, and TC identifies the technical equipment-and-staff component. Without either modifier, the claim represents the global service.
Does 77771 describe superficial skin brachytherapy?
No. It is for interstitial or intracavitary HDR delivery. Superficial skin HDR treatment is represented by the separate 77767–77768 code family.
What documentation supports the intermediate level?
Document the HDR delivery, the interstitial catheter or intracavitary applicator configuration, and the details that support intermediate rather than simple or complex delivery under CPT criteria.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense, and malpractice RVUs, adjusted by each locality’s geographic indices and the applicable conversion factor. Unavailable or separately priced services are labeled rather than assigned a made-up amount.
Source: RVU26D. Effective 2026-10-01 through the day before 2027-01-01.
9,16077770,,Hdr rdncl ntrstl/icav brchtx,A,,1.90,8.43,,8.43,NA,0.13,10.46,10.46,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
9,16177770,26,Hdr rdncl ntrstl/icav brchtx,A,,1.90,1.08,,1.08,,0.07,3.05,3.05,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
9,16277770,TC,Hdr rdncl ntrstl/icav brchtx,A,,0.00,7.35,,7.35,NA,0.06,7.41,7.41,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
9,16377771,,Hdr rdncl ntrstl/icav brchtx,A,,3.71,14.31,,14.31,NA,0.27,18.29,18.29,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
9,16477771,26,Hdr rdncl ntrstl/icav brchtx,A,,3.71,2.10,,2.10,,0.16,5.97,5.97,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
9,16577771,TC,Hdr rdncl ntrstl/icav brchtx,A,,0.00,12.21,,12.21,NA,0.11,12.32,12.32,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
9,16677772,,Hdr rdncl ntrstl/icav brchtx,A,,5.27,21.73,,21.73,NA,0.39,27.39,27.39,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3501112,CA,70,YUBA CITY,1.017,1.096,0.536
3601112,CA,75,REST OF CALIFORNIA,1.017,1.096,0.536
3704112,CO,01,COLORADO,1.012,1.064,0.781
3813102,CT,00,CONNECTICUT,1.020,1.077,1.210
3912202,DC,01,DC + MD/VA SUBURBS,1.054,1.178,1.113
4012102,DE,01,DELAWARE,1.005,0.988,0.899
4109102,FL,03,FORT LAUDERDALE,1.000,1.013,1.808