$159.62–$199.13
This code is for a simple teletherapy isodose plan. Choose 77321 when the documented plan is a special port arrangement, such as a mantle or inverted-Y field.
On this page
CMS RVU26D · Effective 2026-10-01
77321 Radiation plan Medicare reimbursement rates in California
A special teletherapy port plan supports radiation treatment using nonstandard field arrangements, such as mantle or inverted-Y fields, when standard isodose planning categories do not fit. Compare 77321 office and facility rates across CMS payment localities in California.
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 77321 in California?
California has 29 payment localities in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the 29 payment areas shown below, using the same CMS release.
Office / nonfacility
$100.21–$124.48
29 of 29 localities have a supported rate.
Lowest: Chico
Highest: San Jose-Sunnyvale-Santa Clara (San Benito Cnty)
A spread of $24.27 per service.
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.
Where 77321 pays more and less in California
29 payment localities
$100.21 to $124.48
Radiation oncology planning
About 77321: Special teletherapy port planning
A special teletherapy port plan supports radiation treatment using nonstandard field arrangements, such as mantle or inverted-Y fields, when standard isodose planning categories do not fit.
A radiation oncologist and the radiation physics team use this planning service to develop a special external-beam treatment arrangement. It is associated with distinctive field designs such as mantle or inverted-Y fields, rather than routine teletherapy isodose plans. The planning work supports the prescribed treatment geometry and dose distribution in radiation oncology settings.
Report 77321 when the documented plan is a special teletherapy port plan, not merely because a conventional plan involves multiple fields or is technically demanding. The record should identify the treatment arrangement and support why this special plan category was used. CMS separately prices the professional and technical components: modifier 26 represents the professional interpretation, and modifier TC represents the technical work, equipment, and staff. Reporting without either modifier represents the global service.
CMS billing rules for 77321
- 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 RVU0.93 · 33%
- Practice expense (office) RVU1.85 · 65%
- Malpractice RVU0.05 · 2%
11K
Medicare services in 2024 · #1425 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.
77321 compared with similar codes
Office rates for California, from the same CMS release.
$307.66–$382.32
This code describes a complex teletherapy isodose plan. Complexity alone does not make a plan a special port plan for 77321.
$2,114.84–$2,719.18
This code is for IMRT planning. Use 77321 for a special teletherapy port plan that is not an IMRT plan.
$68.21–$82.98
This code covers special radiation dosimetry, a dosimetry service distinct from developing the special teletherapy port plan reported with 77321.
Compare 77321 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.
29 of 29 payment localities
| Payment locality | Office | Facility |
|---|---|---|
| Bakersfield | Office $100.39 | Facility Unavailable |
| Chico | Office $100.21 | Facility Unavailable |
| El Centro | Office $100.22 | Facility Unavailable |
| Fresno | Office $100.21 | Facility Unavailable |
| Hanford-Corcoran | Office $100.21 | Facility Unavailable |
| Los Angeles-Long Beach-Anaheim (Los Angeles/Orange Cnty) | Office $106.54 | Facility Unavailable |
| Madera | Office $100.21 | Facility Unavailable |
| Merced | Office $100.21 | Facility Unavailable |
| Modesto | Office $100.21 | Facility Unavailable |
| Napa | Office $115.31 | Facility Unavailable |
| Oxnard-Thousand Oaks-Ventura | Office $106.01 | Facility Unavailable |
| Redding | Office $100.21 | Facility Unavailable |
| Rest Of California | Office $100.21 | Facility Unavailable |
| Riverside-San Bernardino-Ontario | Office $100.77 | Facility Unavailable |
| Sacramento-Roseville-Folsom | Office $104.94 | Facility Unavailable |
| Salinas | Office $104.54 | Facility Unavailable |
| San Diego-Chula Vista-Carlsbad | Office $106.80 | Facility Unavailable |
| San Francisco-Oakland-Berkeley (Marin Cnty) | Office $121.91 | Facility Unavailable |
| San Francisco-Oakland-Berkeley (San Francisco/San Mateo/Alameda/Contra Costa Cnty) | Office $121.85 | Facility Unavailable |
| San Jose-Sunnyvale-Santa Clara (San Benito Cnty) | Office $124.48 | Facility Unavailable |
| San Jose-Sunnyvale-Santa Clara (Santa Clara Cnty) | Office $124.25 | Facility Unavailable |
| San Luis Obispo-Paso Robles | Office $102.87 | Facility Unavailable |
| Santa Cruz-Watsonville | Office $107.69 | Facility Unavailable |
| Santa Maria-Santa Barbara | Office $104.88 | Facility Unavailable |
| Santa Rosa-Petaluma | Office $108.77 | Facility Unavailable |
| Stockton | Office $100.21 | Facility Unavailable |
| Vallejo | Office $115.23 | Facility Unavailable |
| Visalia | Office $100.21 | Facility Unavailable |
| Yuba City | Office $100.21 | Facility Unavailable |
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77321 billing questions
When should 77321 be chosen instead of 77306 or 77307?
Use 77321 for a special teletherapy port arrangement, such as a mantle or inverted-Y field. Codes 77306 and 77307 describe simple or complex teletherapy isodose plans, respectively.
Does a plan qualify for 77321 just because it is complex?
No. The documentation should support a special port plan, rather than relying only on the number of fields or the general difficulty of planning.
How are the professional and technical components reported?
Modifier 26 identifies the professional component, and modifier TC identifies the technical component. Without either modifier, the claim represents the global service.
Can 77300 be reported with 77321?
A separately performed basic radiation dosimetry calculation may be reported with the plan when the record supports that distinct work.
What documentation supports 77321?
Document the special field arrangement and the planning work performed. The record should make clear why the service is a special port plan rather than a routine simple or complex isodose plan.
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.
9,06577318,,Brachytx isodose complex,A,,2.83,10.84,,10.84,NA,0.19,13.86,13.86,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
9,06677318,26,Brachytx isodose complex,A,,2.83,1.60,,1.60,,0.12,4.55,4.55,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
9,06777318,TC,Brachytx isodose complex,A,,0.00,9.24,,9.24,NA,0.07,9.31,9.31,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
9,06877321,,Special teletx port plan,A,,0.93,1.85,,1.85,NA,0.05,2.83,2.83,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
9,06977321,26,Special teletx port plan,A,,0.93,0.52,,0.52,,0.04,1.49,1.49,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
9,07077321,TC,Special teletx port plan,A,,0.00,1.33,,1.33,NA,0.01,1.34,1.34,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
9,07177331,,Special radiation dosimetry,A,,0.85,1.05,,1.05,NA,0.05,1.95,1.95,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00