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CPT code 79300: Radioactive colloid, interstitial administration2026 Medicare rate & RVUs

Reports therapeutic placement of radioactive colloid within tissue, with Medicare billing divided into professional, technical, or global components.

CMS RVU26DEffective Oct 1, 2026109 payment localities

Medicare rate · 79300

Radioactive colloid, interstitial administration

Office or facility?

Work RVUs
0
Total RVUs
0.00
Global days
XXX

National rate · 2026

—

Not priced in the facility setting.

See every locality for 79300 →Billed by an NP, PA or therapist? →

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

Your location

Medicare pays by the payment locality where the service is performed.

On this page 10 sections
  1. Medicare rate
  2. What 79300 covers
  3. By payment locality
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Similar codes
  8. Related codes
  9. Billing questions
  10. Sources

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

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 of 109 payment localities

79300 office and facility rates by payment locality
Payment localityOfficeFacility
AlabamaUnavailableUnavailable
AlaskaUnavailableUnavailable
ArizonaUnavailableUnavailable
ArkansasUnavailableUnavailable
Atlanta, GAUnavailableUnavailable
Austin, TXUnavailableUnavailable
Bakersfield, CAUnavailableUnavailable
Baltimore area, MDUnavailableUnavailable
Beaumont, TXUnavailableUnavailable
Brazoria, TXUnavailableUnavailable

79300 rates by state

Office rate range in each state. Select a state to see its payment localities.

MEWIVTNHMTNDMNMINYMARIWAIDWYSDIAILINOHPANJCTORNVUTCONEMOKYWVVAMDDECAAZNMKSOKARTNNCSCDCTXLAMSALGAFLAKHI

Explore a state

Local rates. Clear comparisons.

Hover or focus a tile to see its rate range. Select it to open the state’s fee schedule.

View every state and territory as a table
79300 office rate range by state
State / territoryOffice rate rangeLocalities
AKNo published base rate1
ALNo published base rate1
ARNo published base rate1
AZNo published base rate1
CANo published base rate29
CONo published base rate1
CTNo published base rate1
DCNo published base rate1
DENo published base rate1
FLNo published base rate3
GANo published base rate2
GUNo published base rate1
HINo published base rate1
IANo published base rate1
IDNo published base rate1
ILNo published base rate4
INNo published base rate1
KSNo published base rate1
KYNo published base rate1
LANo published base rate2
MANo published base rate2
MDNo published base rate3
MENo published base rate2
MINo published base rate2
MNNo published base rate1
MONo published base rate3
MSNo published base rate1
MTNo published base rate1
NCNo published base rate1
NDNo published base rate1
NENo published base rate1
NHNo published base rate1
NJNo published base rate2
NMNo published base rate1
NVNo published base rate1
NYNo published base rate5
OHNo published base rate1
OKNo published base rate1
ORNo published base rate2
PANo published base rate2
PRNo published base rate1
RINo published base rate1
SCNo published base rate1
SDNo published base rate1
TNNo published base rate1
TXNo published base rate8
UTNo published base rate1
VANo published base rate2
VINo published base rate1
VTNo published base rate1
WANo published base rate2
WINo published base rate1
WVNo published base rate1
WYNo published base rate1

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

Office or facility?

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

RuleCMS valueWhat it means
Global periodXXXThe global surgery concept doesn’t apply.
Multiple procedures0No multiple-procedure reduction.
Bilateral (modifier 50)0The 150% bilateral adjustment doesn’t apply.
Assistant at surgery (80/81/82/AS)0Not paid without supporting documentation.
Co-surgeons (62)0Not permitted.
Team surgery (66)0Not permitted.
Professional/technical1Diagnostic 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.

When to use modifier 26

79300 compared with similar codes

Compare codes · National

4 codes, side by side

Office or facility?

  • 79300

    Radioactive colloid, interstitial administration0 wRVU

    Not priced

  • 79200

    Radiopharmaceutical therapy, intra-arterial administration1.94 wRVU

    $130.60

  • 79440

    Joint radiotherapy, intra-articular administration1.94 wRVU

    $117.24

  • 79101

    Radiopharmaceutical therapy, intravenous route1.91 wRVU

    $142.96

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.

Codes related to 79300

Related codes aren’t interchangeable: bill the code that matches the service performed.

Codes related to 79300
CodeHow it relatesNational office range
Same family
79005Radiopharmaceutical therapy, oral administrationRadiopharmaceutical therapy delivered by the oral route.$120.87–$168.49
79101Radiopharmaceutical therapy, intravenous routeRadiopharmaceutical therapy delivered intravenously.$130.76–$182.24
79200Radiopharmaceutical therapy, intra-arterial administrationRadiopharmaceutical therapy delivered into a body cavity.$120.75–$166.41
79440Joint radiotherapy, intra-articular administrationRadiopharmaceutical therapy delivered into a joint.$109.27–$152.19

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

Open CMS sourceHow we calculate rates

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