No office rate
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.
On this page
CMS RVU26D · Effective 2026-10-01
63621 Spinal radiosurgery Medicare reimbursement rates in Alaska
Report this add-on for each spinal lesion treated after the first during stereotactic radiosurgery, alongside the primary spinal lesion procedure. Compare 63621 office and facility rates across CMS payment localities in Alaska.
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 63621 in Alaska?
Alaska has 1 payment locality in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the payment area shown below, using the same CMS release.
Office / nonfacility
No supported rate
Facility setting
$274.31
1 of 1 localities have a supported rate.
Payment area: Alaska*
One mapped payment locality.
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.
Radiation oncology
About 63621: Additional spinal stereotactic radiosurgery lesion
Report this add-on for each spinal lesion treated after the first during stereotactic radiosurgery, alongside the primary spinal lesion procedure.
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.
CMS billing rules for 63621
- Global period
- Add-on code: billed only together with a primary procedure and paid within that procedure's global period.
Where the value comes from
- Work RVU3.90 · 56%
- Practice expense (office) RVU1.37 · 20%
- Malpractice RVU1.64 · 24%
168
Medicare services in 2024 · #4483 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.
63621 compared with similar codes
Office rates for Alaska, from the same CMS release.
No office rate
63600 is for surgical removal of a spinal cord lesion. Code 63621 is for an additional lesion treated with focused radiation, not excision.
$990.99
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.
Compare 63621 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.
1 of 1 payment localities
Alaska* →
Office / nonfacility
Unavailable
Facility
$274.31
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How this local rate is calculated
Each RVU component is multiplied by its own geographic practice cost index (GPCI). The three adjusted components are added, then multiplied by the conversion factor. These are the inputs used for 63621 in Alaska*.
PPRRVU2026_Oct_nonQPP.csv
7,076
- Code
- 63621
- Physician work
- 3.90
- Practice expense
- 1.37
- Malpractice
- 1.64
GPCI2026.csv
5
- Locality
- Alaska*
- Physician work
- 1.500
- Practice expense
- 1.065
- Malpractice
- 0.551
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 3.90 | × 1.500 | 5.8500 |
| Practice expense | 1.37 | × 1.065 | 1.4590 |
| Malpractice | 1.64 | × 0.551 | 0.9036 |
| Total RVUs | 8.2127 | ||
| Conversion factor | × 33.4009 | ||
Facility rate, Alaska*$274.31
Explore RVUs, geographic factors and the full formula
Facility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 3.9 | 1.5 |
| Practice expense | 1.37 | 1.065 |
| Malpractice | 1.64 | 0.551 |
(3.9 × 1.5 + 1.37 × 1.065 + 1.64 × 0.551) × $33.4009 = $274.31
The office and facility calculations use their respective practice-expense RVUs. The facility amount here is the physician fee, not a separate hospital or facility bill.
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 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.
7,07363600,,Remove spinal cord lesion,A,,14.74,11.53,NA,11.53,,6.21,32.48,32.48,0,090,0.11,0.76,0.13,2,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
7,07463610,,Stimulation of spinal cord,A,,8.50,4.35,NA,4.35,,3.58,16.43,16.43,0,000,0.00,0.00,0.00,2,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
7,07563620,,Srs spinal lesion,A,,15.21,11.72,NA,11.72,,6.40,33.33,33.33,0,090,0.11,0.76,0.13,0,0,2,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
7,07663621,,Srs spinal lesion addl,A,,3.90,1.37,NA,1.37,,1.64,6.91,6.91,0,ZZZ,0.00,0.00,0.00,0,0,2,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
7,07763650,,Implant neuroelectrodes,A,,6.97,63.75,,3.48,,0.79,71.51,11.24,0,010,0.10,0.80,0.10,2,0,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
7,07863655,,Implant neuroelectrodes,A,,10.65,10.63,NA,10.63,,3.83,25.11,25.11,0,090,0.11,0.76,0.13,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
7,07963661,,Remove spine eltrd perq aray,A,,4.95,16.33,,3.32,,0.98,22.26,9.25,0,010,0.10,0.80,0.10,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
2,,,,,,
3Medicare Administrative Contractor (MAC),State,Locality Number,Locality Name,2026 PW GPCI (with 1.0 Floor)***,2026 PE GPCI,2026 MP GPCI
410112,AL,00,ALABAMA,1.000,0.875,0.566
502102,AK,01,ALASKA*,1.500,1.065,0.551
603102,AZ,00,ARIZONA,1.000,0.969,0.856
707102,AR,13,ARKANSAS,1.000,0.859,0.515
801112,CA,54,BAKERSFIELD,1.019,1.096,0.609