Billing code 77301: IMRT planningMedicare rate & RVUs in Guam
Reports computerized IMRT planning that optimizes radiation dose across a target while evaluating dose exposure to nearby critical structures.
Medicare pays $2,180.17 for 77301 in the office in Guam (Hawaii, Guam). 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 77301 covers
This service covers development of a computerized intensity-modulated radiation therapy plan. The team shapes and optimizes radiation fields to deliver the prescribed dose to the target while assessing exposure to organs at risk, often using dose-volume analysis. A radiation oncologist directs and approves the plan, with work commonly performed by medical physicists and dosimetrists in a radiation oncology department or freestanding center. It is planning work, not delivery of the radiation treatment.
Report the code when the record supports an IMRT-specific optimized plan, including the target and critical-structure evaluation, rather than a conventional teletherapy isodose plan. Documentation should identify the treatment plan, prescription, dose evaluation, and physician approval. CMS recognizes professional and technical components: modifier 26 identifies the professional interpretation, modifier TC the equipment and staff, and no modifier 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.
77301 in Hawaii, Guam
| Payment locality | Office | Facility |
|---|---|---|
| Hawaii, Guam | $2,180.17 | Unavailable |
How the 77301 rate is calculated
Each of 77301’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 · 77301
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 7.79Practice expense 50.20Malpractice 0.70
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 77301
The CMS indicators that decide how 77301 is paid alongside other services.
CMS payment indicators · 77301
IMRT planning
| 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
77301 without 26 · national office
$1,960.30
IMRT planning
77301-26 · Professional component
$419.18
Pays only the interpretation and report.
77301 compared with similar codes
Compare codes
77301 vs 77306 vs 77307 vs 77300 vs 77338: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 77306Radiation plan
- This code describes a simple conventional teletherapy isodose plan. Choose 77301 when the service is IMRT-specific optimized planning with dose-volume evaluation.
- 77307Isodose planning
- This code describes a complex conventional teletherapy isodose plan. It is not the IMRT planning code, even when the conventional plan is technically complex.
- 77300Dosimetry calculation
- 77300 is for a radiation dose calculation, not the comprehensive IMRT plan and dose-volume evaluation reported with 77301.
- 77338MLC design
- 77338 reports design of an IMRT multileaf collimator device; 77301 reports the treatment plan itself.
77301 billing questions
When should 77301 be selected instead of 77306 or 77307?
Use 77301 for an IMRT-specific optimized plan with dose-volume evaluation. Codes 77306 and 77307 describe simple or complex conventional teletherapy isodose planning, not IMRT planning.
Does 77301 report radiation treatment delivery?
No. It reports development of the IMRT plan; radiation delivery is a separate service.
How are the professional and technical portions billed?
Modifier 26 identifies the professional interpretation, while modifier TC identifies the technical portion involving equipment and staff. Billing without either modifier represents the global service.
What documentation supports reporting 77301?
Keep the IMRT plan and records supporting its optimization, target and critical-structure dose evaluation, prescribed dose, and physician approval.
How does 77338 relate to 77301?
Code 77338 reports design of an IMRT multileaf collimator device and is an add-on to 77301 when that device-design service is 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
Show the CMS file lines behind this rate
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