Billing code 63621: Spinal radiosurgeryMedicare rate & RVUs in Oregon
Report this add-on for each spinal lesion treated after the first during stereotactic radiosurgery, alongside the primary spinal lesion procedure.
CMS doesn’t publish an office rate for 63621 in Oregon.
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 63621 covers
Code 63621 represents treatment of an additional spinal lesion during stereotactic radiosurgery (SRS), after the first lesion is treated. SRS uses highly focused radiation directed at a defined target, such as a spinal tumor or metastasis. Neurosurgeons and radiation oncologists may participate in the treatment, with services performed in a radiation oncology or hospital setting. This code identifies the additional lesion work; it is not used for surgical removal of a spinal cord lesion.
Report 63621 with the primary spinal SRS code 63620, for each additional lesion treated. Documentation should support the number of distinct spinal lesions treated and their inclusion in the SRS treatment. CMS classifies 63621 as an add-on code: it is billed only with a primary procedure and its payment falls within that procedure’s global period. It does not stand alone as a separate primary 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.
Where 63621 pays more and less in Oregon
| Payment locality | Office | Facility |
|---|---|---|
| Portland | Unavailable | $223.94 |
| Rest Of Oregon | Unavailable | $214.35 |
How the 63621 rate is calculated
Each of 63621’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 · 63621
RVUs × geographic indexes × conversion factor
Swap in your local Medicare rate.
Work 3.90Practice expense 1.37Malpractice 1.64
All indexes start at 1.000 (the national rate). Enter a ZIP or drag a slider.
Payment rules and modifiers for 63621
The CMS indicators that decide how 63621 is paid alongside other services.
CMS payment indicators · 63621
Spinal radiosurgery
| Rule | CMS value | What it means |
|---|---|---|
| Global period | ZZZ | Add-on code: falls within the primary procedure’s global period. |
| 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) | 2 | Paid. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 0 | Physician service: no professional/technical split. |
What modifiers do to the payment
Modifier 80 · payment effect
With and without the modifier
63621 without 80 · national facility
$230.80
Spinal radiosurgery
63621-80 · Assistant: 16%
$36.93
A physician assistant at surgery is paid 16% of the surgeon’s fee schedule amount.
63621 compared with similar codes
Compare codes
63621 vs 63620 vs 63600 vs 77372: national Medicare rates
Swap in your local Medicare rate.
How to choose
- 63620Spinal radiosurgery
- 63620 represents spinal SRS for the first lesion and is the required primary procedure. Use 63621 only for additional lesions treated in that SRS service.
- 63600Spinal lesion removal
- 63600 is for surgical removal of a spinal cord lesion. Code 63621 is for an additional lesion treated with focused radiation, not excision.
- 77372Stereotactic radiosurgery
- 77372 identifies SRS treatment delivery, while 63621 identifies the physician service for each additional spinal lesion. They describe distinct services and may be reported together.
63621 billing questions
What primary code must accompany 63621?
Report 63621 with 63620, the primary code for spinal SRS of the first lesion. This add-on code is not reported by itself.
How many units of 63621 should be reported?
Report one unit for each additional spinal lesion treated after the first. The record should support the distinct lesions included in the SRS treatment.
Is 63621 used for surgical removal of a spinal lesion?
No. It represents an additional lesion treated with SRS. Code 63600 describes removal of a spinal cord lesion, a different surgical service.
How does the global-period rule affect payment?
CMS treats 63621 as an add-on paid within the primary procedure’s global period. It must be billed with the primary procedure rather than as a separate standalone service.
What documentation supports reporting an additional lesion?
Document the spinal lesions treated and the SRS treatment that includes them, so the record supports reporting an additional lesion beyond the one represented by 63620.
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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