CPT code 79300: Radioactive colloid, interstitial administration2026 Medicare rate & RVUs in Missouri
Reports therapeutic placement of radioactive colloid within tissue, with Medicare billing divided into professional, technical, or global components.
CMS doesn’t publish an office rate for 79300 in Missouri.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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On this page 9 sections
What 79300 covers
This CPT service describes treatment using a radioactive colloid placed within tissue at a targeted site. Interstitial administration means placement into tissue, rather than delivery into a body cavity, joint, or bloodstream. Nuclear medicine and radiation oncology teams may provide or report the service in settings equipped to administer therapeutic radiopharmaceuticals; the route and material distinguish it from other radiopharmaceutical therapy codes.
Medicare assigns this code physician fee schedule status C, or carrier priced: there is no national payment amount, and the Medicare Administrative Contractor sets payment for each claim. The professional interpretation may be reported with modifier 26, and the technical portion for equipment and staff with modifier TC; billing without either modifier represents the global service. Select the component that matches the service furnished and documented.
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 79300 pays more and less in Missouri
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Kansas City, MO | Unavailable | Unavailable |
| Metropolitan St. Louis, MO | Unavailable | Unavailable |
| Rest of Missouri | Unavailable | Unavailable |
How the 79300 rate is calculated
Each of 79300’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 · 79300
RVUs × geographic indexes × conversion factor
Work0.00
0.00 RVUs× 1.000 GPCI
Practice expense0.00
0.00 RVUs× 1.000 GPCI
Malpractice0.00
0.00 RVUs× 1.000 GPCI
Adjusted RVUs
0.0000
Conversion factor
$33.4009
Medicare rate
$0.00
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 79300
The CMS indicators that decide how 79300 is paid alongside other services.
CMS payment indicators · 79300
Radioactive colloid, interstitial administration
| 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
79300 without 26 · national facility
$0.00
Radioactive colloid, interstitial administration
79300-26 · Professional component
$62.13
Pays only the interpretation and report.
79300 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 79200Radiopharmaceutical therapyIntra-arterial administration
- Choose 79200 when the radiopharmaceutical is administered into a body cavity. Choose 79300 for interstitial placement of radioactive colloid in tissue.
- 79440Joint radiotherapyIntra-articular administration
- Code 79440 is for radiopharmaceutical therapy administered into a joint; 79300 describes interstitial radioactive colloid administration.
- 79101Radiopharmaceutical therapyIntravenous route
- Code 79101 describes intravenous radiopharmaceutical therapy. Code 79300 is distinguished by interstitial placement of radioactive colloid.
79300 billing questions
When should this code be selected instead of 79200?
Use 79300 for interstitial placement of radioactive colloid into tissue. Code 79200 describes radiopharmaceutical therapy delivered into a body cavity.
How do modifiers 26 and TC apply?
Modifier 26 identifies the professional interpretation, and modifier TC identifies the technical portion involving equipment and staff. Without either modifier, the claim represents the global service.
How does Medicare price this code?
The physician fee schedule status is C, or carrier priced. The Medicare Administrative Contractor sets payment for each claim; CMS publishes no national payment amount.
Does this code describe diagnostic imaging?
It describes therapeutic interstitial administration of radioactive colloid, not a diagnostic imaging study.
What should documentation establish?
Document the therapeutic service, the radioactive colloid administration, and that delivery was interstitial. For a component claim, identify whether the professional interpretation or technical service was furnished.
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
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