$264.87
78630 assesses tracer movement through CSF spaces; 78635 is the ventricular-focused CSF study.
On this page
CMS RVU26D · Effective 2026-10-01
78630 CSF scan Medicare reimbursement rates in Oklahoma
A radionuclide cerebrospinal fluid scan tracks tracer movement through CSF spaces to assess circulation when a clinician needs functional imaging. Compare 78630 office and facility rates across CMS payment localities in Oklahoma.
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 78630 in Oklahoma?
Oklahoma 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
$265.05
1 of 1 localities have a supported rate.
Payment area: Oklahoma
One mapped payment locality.
Facility setting
No supported rate
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.
Nuclear medicine
About 78630: Radionuclide cerebrospinal fluid scan
A radionuclide cerebrospinal fluid scan tracks tracer movement through CSF spaces to assess circulation when a clinician needs functional imaging.
This nuclear medicine study follows a radiotracer through cerebrospinal fluid spaces after intrathecal administration, with images obtained to evaluate CSF circulation and distribution. It is typically performed in a hospital nuclear medicine department or imaging center, with a nuclear medicine physician or radiologist interpreting the study. A clinician may request it when the diagnostic question concerns how CSF moves through the intracranial spaces rather than brain tissue appearance or shunt function alone.
Report 78630 for the CSF scan itself; the medical record should support the clinical question, the study performed, and the interpreting physician’s findings. CMS recognizes professional and technical components: report modifier 26 for the interpretation, TC for the equipment and staff, or neither modifier when billing the global service. The professional and technical services may be billed separately when performed by different entities. The scan’s findings should be distinguished from a targeted CSF leak study, ventricular study, or shunt evaluation when selecting among related nuclear medicine services.
CMS billing rules for 78630
- Professional and technical components
- Diagnostic test with a professional component (modifier 26, interpretation) and a technical component (modifier TC, equipment and staff); billing without a modifier is the global service.
Where the value comes from
- Work RVU0.66 · 7%
- Practice expense (office) RVU8.06 · 91%
- Malpractice RVU0.10 · 1%
796
Medicare services in 2024 · #3152 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.
78630 compared with similar codes
Office rates for Oklahoma, from the same CMS release.
$256.41
Use 78645 when the study evaluates a CSF shunt. Code 78630 for a scan addressing CSF circulation and distribution.
$220.77
78650 is directed at CSF leakage imaging; 78630 describes the broader CSF scan.
Compare 78630 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
Oklahoma →
Office / nonfacility
$265.05
Facility
Unavailable
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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 78630 in Oklahoma.
PPRRVU2026_Oct_nonQPP.csv
9,464
- Code
- 78630
- Physician work
- 0.66
- Practice expense
- 8.06
- Malpractice
- 0.10
GPCI2026.csv
86
- Locality
- Oklahoma
- Physician work
- 1.000
- Practice expense
- 0.893
- Malpractice
- 0.777
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 0.66 | × 1.000 | 0.6600 |
| Practice expense | 8.06 | × 0.893 | 7.1976 |
| Malpractice | 0.10 | × 0.777 | 0.0777 |
| Total RVUs | 7.9353 | ||
| Conversion factor | × 33.4009 | ||
Office / nonfacility rate, Oklahoma$265.05
Explore RVUs, geographic factors and the full formula
Office / nonfacility
| Component | RVU | Local GPCI |
|---|---|---|
| Work | 0.66 | 1 |
| Practice expense | 8.06 | 0.893 |
| Malpractice | 0.1 | 0.777 |
(0.66 × 1 + 8.06 × 0.893 + 0.1 × 0.777) × $33.4009 = $265.05
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.
78630 billing questions
How does 78630 differ from a CSF leak study?
78630 describes a CSF scan assessing tracer movement through CSF spaces. Use 78650 when the imaging service is specifically a CSF leakage study.
When should 78635 be considered instead?
78635 is for CSF ventriculography, a ventricular-focused study. Choose based on the study actually performed and its diagnostic target, not just the fact that both involve CSF.
Can the professional and technical services be billed separately?
Yes. Modifier 26 identifies the professional interpretation, and TC identifies the technical service; billing without either modifier represents the global service.
What documentation supports 78630?
The record should identify the clinical question about CSF circulation, the scan performed, and the interpreting physician’s findings.
Is 78630 the code for evaluating a CSF shunt?
No. 78645 describes CSF shunt evaluation; 78630 reports a scan focused on CSF circulation and distribution.
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.
9,46178610,,Brain flow imaging only,A,,0.29,4.34,,4.34,NA,0.06,4.69,4.69,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,16.55,16.55,0.18
9,46278610,26,Brain flow imaging only,A,,0.29,0.10,,0.10,,0.02,0.41,0.41,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
9,46378610,TC,Brain flow imaging only,A,,0.00,4.24,,4.24,NA,0.04,4.28,4.28,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,01,0,99,16.45,16.45,0.16
9,46478630,,Cerebrospinal fluid scan,A,,0.66,8.06,,8.06,NA,0.10,8.82,8.82,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,16.70,16.70,0.17
9,46578630,26,Cerebrospinal fluid scan,A,,0.66,0.22,,0.22,,0.04,0.92,0.92,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
9,46678630,TC,Cerebrospinal fluid scan,A,,0.00,7.84,,7.84,NA,0.06,7.90,7.90,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,01,0,99,16.48,16.48,0.13
9,46778635,,Csf ventriculography,A,,0.59,8.15,,8.15,NA,0.08,8.82,8.82,1,XXX,0.00,0.00,0.00,0,0,0,0,0,9,,33.4009,09,0,99,16.72,16.72,0.13
8311502,NC,00,NORTH CAROLINA,1.000,0.933,0.639
8403302,ND,01,NORTH DAKOTA**,1.000,1.000,0.406
8515202,OH,00,OHIO,1.000,0.913,1.008
8604312,OK,00,OKLAHOMA,1.000,0.893,0.777
8702302,OR,01,PORTLAND,1.016,1.111,0.744
8802302,OR,99,REST OF OREGON,1.000,0.996,0.703
8912502,PA,01,METROPOLITAN PHILADELPHIA,1.018,1.041,1.193