CPT code 36598: Device evaluation, fluoroscopic contrast study2026 Medicare rate & RVUs in Marin County, CA
Use this code to evaluate an existing central venous access device by injecting contrast through it and assessing the device with fluoroscopic imaging.
In Marin County, CA, Medicare pays $153.62 for 36598 in the office and $33.06 when it’s performed in a hospital or facility.
Check a contract rate as a % of Medicare · 36598 nationwide
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 11 sections
What 36598 covers
A clinician injects contrast through an existing central venous access device and uses fluoroscopy to assess its function and position. Radiologists and interventional radiologists commonly perform the study when a port or catheter is suspected of leaking, being obstructed, disconnected, or malpositioned. The service evaluates the device; it is not a catheter insertion or repositioning procedure.
Report the study when the record identifies the device, the reason for evaluation, the contrast injection, and the fluoroscopic findings. Payment for this injection or minor service is available only when no other physician service is billed that day. The 0-day global period includes same-day preoperative and postoperative care. In a same-session multiple-procedure situation, the highest-valued procedure is paid in full and others at 50%. Modifier 50 results in payment at 150% for a bilateral procedure. Assistant-at-surgery payment requires medical-necessity documentation; co-surgeons and team surgery are not permitted.
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.
How Marin County, CA compares for 36598
Across 109 of 109 payment localities, the office rate for 36598 runs from $102.15 in Arkansas to $157.03 in San Benito County, CA. Marin County, CA pays $153.62. The RVUs are the same everywhere; the geographic indexes change the dollars.
- Marin County, CA · this page$153.62
- Bakersfield, CA · California$124.04−$29.58
- Chico, CA · California$123.82−$29.80
- El Centro, CA · California$123.83−$29.79
- Fresno, CA · California$123.82−$29.80
- Hanford, CA · California$123.82−$29.80
- Los Angeles, CA · California$132.48−$21.14
Other areas in California first, then benchmark localities. Bars start at $0.
Every other payment area
| Payment locality | Office | Facility |
|---|---|---|
| Madera, CACalifornia | $123.82 | $30.10 |
| Merced, CACalifornia | $123.82 | $30.10 |
| Modesto, CACalifornia | $123.82 | $30.10 |
| Napa, CACalifornia | $144.73 | $32.03 |
| Oxnard, CACalifornia | $131.98 | $30.92 |
| Redding, CACalifornia | $123.82 | $30.10 |
| Rest of CaliforniaCalifornia | $123.82 | $30.10 |
| Riverside, CACalifornia | $124.58 | $30.87 |
| Sacramento, CACalifornia | $130.27 | $30.83 |
| Salinas, CACalifornia | $129.79 | $30.69 |
| San Diego, CACalifornia | $133.10 | $30.83 |
| San Francisco, CACalifornia | $153.54 | $32.98 |
| San Benito County, CACalifornia | $157.03 | $33.73 |
| Santa Clara County, CACalifornia | $156.70 | $33.40 |
| San Luis Obispo, CACalifornia | $127.67 | $30.28 |
| Santa Cruz, CACalifornia | $134.57 | $30.68 |
| Santa Maria, CACalifornia | $130.35 | $30.65 |
| Santa Rosa, CACalifornia | $135.95 | $30.95 |
| Stockton, CACalifornia | $123.82 | $30.10 |
| Vallejo, CACalifornia | $144.62 | $31.92 |
| Visalia, CACalifornia | $123.82 | $30.10 |
| Yuba City, CACalifornia | $123.82 | $30.10 |
| Washington, DC areaDistrict of Columbia | $133.40 | $32.67 |
| Miami, FLFlorida | $123.15 | $34.13 |
| Chicago, ILIllinois | $119.54 | $33.61 |
| Manhattan, NYNew York | $133.31 | $33.95 |
| AlaskaAlaska | $132.69 | $41.63 |
| AlabamaAlabama | $103.70 | $28.88 |
| ArkansasArkansas | $102.15 | $28.70 |
| ArizonaArizona | $112.79 | $29.93 |
| ColoradoColorado | $121.41 | $30.43 |
| ConnecticutConnecticut | $123.77 | $31.68 |
| DelawareDelaware | $114.71 | $30.23 |
| Fort Lauderdale, FLFlorida | $118.95 | $32.34 |
| Rest of FloridaFlorida | $113.14 | $31.39 |
| Atlanta, GAGeorgia | $117.88 | $31.00 |
| Rest of GeorgiaGeorgia | $106.68 | $30.41 |
| Hawaii, Guam, HIHawaii | $127.18 | $29.96 |
| IowaIowa | $106.88 | $28.64 |
| IdahoIdaho | $107.51 | $28.84 |
| East St. Louis, ILIllinois | $111.11 | $32.44 |
| Rest of IllinoisIllinois | $109.43 | $31.36 |
| Suburban Chicago, ILIllinois | $120.29 | $32.48 |
| IndianaIndiana | $108.16 | $28.90 |
| KansasKansas | $106.15 | $28.85 |
| KentuckyKentucky | $105.77 | $29.75 |
| New Orleans, LALouisiana | $110.94 | $30.48 |
| Rest of LouisianaLouisiana | $105.51 | $29.84 |
| Metropolitan Boston, MAMassachusetts | $134.00 | $31.90 |
| Rest of MassachusettsMassachusetts | $120.56 | $30.52 |
| Baltimore area, MDMaryland | $123.37 | $31.63 |
| Rest of MarylandMaryland | $117.02 | $30.49 |
| Rest of MaineMaine | $107.86 | $29.19 |
| Southern Maine, MEMaine | $114.23 | $29.50 |
| Detroit, MIMichigan | $114.37 | $31.86 |
| Rest of MichiganMichigan | $108.41 | $30.35 |
| MinnesotaMinnesota | $116.85 | $28.87 |
| Metropolitan Kansas City, MOMissouri | $110.39 | $30.10 |
| Metropolitan St. Louis, MOMissouri | $111.61 | $30.21 |
| Rest of MissouriMissouri | $103.49 | $29.78 |
| MississippiMississippi | $102.85 | $29.23 |
| MontanaMontana | $115.90 | $30.39 |
| North CarolinaNorth Carolina | $109.06 | $29.28 |
| North DakotaNorth Dakota | $114.51 | $29.01 |
| NebraskaNebraska | $107.55 | $28.63 |
| New HampshireNew Hampshire | $119.28 | $30.27 |
| Northern New JerseyNew Jersey | $131.90 | $32.71 |
| Rest of New JerseyNew Jersey | $125.33 | $31.95 |
| New MexicoNew Mexico | $108.94 | $30.53 |
| NevadaNevada | $115.60 | $30.01 |
| NYC suburbs and Long Island, NYNew York | $136.36 | $34.70 |
| Poughkeepsie and northern NYC suburbs, NYNew York | $125.98 | $32.35 |
| Queens, NYNew York | $134.77 | $33.70 |
| Rest of New YorkNew York | $110.73 | $29.50 |
| OhioOhio | $108.13 | $30.06 |
| OklahomaOklahoma | $105.80 | $29.44 |
| Portland, OROregon | $125.62 | $30.63 |
| Rest of OregonOregon | $114.85 | $29.68 |
| Metropolitan Philadelphia, PAPennsylvania | $120.46 | $31.44 |
| Rest of PennsylvaniaPennsylvania | $108.43 | $29.94 |
| Puerto RicoPuerto Rico | $116.85 | $30.40 |
| Rhode IslandRhode Island | $119.06 | $30.73 |
| South CarolinaSouth Carolina | $108.75 | $29.74 |
| South DakotaSouth Dakota | $114.35 | $28.84 |
| TennesseeTennessee | $106.67 | $28.95 |
| Austin, TXTexas | $120.87 | $30.41 |
| Beaumont, TXTexas | $107.68 | $29.87 |
| Brazoria, TXTexas | $114.77 | $30.04 |
| Dallas, TXTexas | $115.43 | $30.26 |
| Fort Worth, TXTexas | $114.56 | $30.25 |
| Galveston, TXTexas | $115.06 | $30.16 |
| Houston, TXTexas | $116.35 | $31.44 |
| Rest of TexasTexas | $111.11 | $29.96 |
| UtahUtah | $110.29 | $29.92 |
| VirginiaVirginia | $113.69 | $29.64 |
| Virgin Islands, VIUnited States Virgin Islands | $116.85 | $30.40 |
| VermontVermont | $113.85 | $29.20 |
| Rest of WashingtonWashington | $120.40 | $30.36 |
| King County, WAWashington | $137.00 | $32.08 |
| WisconsinWisconsin | $110.52 | $28.61 |
| West VirginiaWest Virginia | $105.18 | $30.88 |
| WyomingWyoming | $115.29 | $29.79 |
36598 rates by state
Office rate range in each state. Select a state to see its payment localities.
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.
$102.15
$140.43
Color shows the midpoint of each state’s locality range.
View every state and territory as a table
| State / territory | Office rate range | Localities |
|---|---|---|
| AK | $132.69 | 1 |
| AL | $103.70 | 1 |
| AR | $102.15 | 1 |
| AZ | $112.79 | 1 |
| CA | $123.82–$157.03 | 29 |
| CO | $121.41 | 1 |
| CT | $123.77 | 1 |
| DC | $133.40 | 1 |
| DE | $114.71 | 1 |
| FL | $113.14–$123.15 | 3 |
| GA | $106.68–$117.88 | 2 |
| GU | $127.18 | 1 |
| HI | $127.18 | 1 |
| IA | $106.88 | 1 |
| ID | $107.51 | 1 |
| IL | $109.43–$120.29 | 4 |
| IN | $108.16 | 1 |
| KS | $106.15 | 1 |
| KY | $105.77 | 1 |
| LA | $105.51–$110.94 | 2 |
| MA | $120.56–$134.00 | 2 |
| MD | $117.02–$133.40 | 3 |
| ME | $107.86–$114.23 | 2 |
| MI | $108.41–$114.37 | 2 |
| MN | $116.85 | 1 |
| MO | $103.49–$111.61 | 3 |
| MS | $102.85 | 1 |
| MT | $115.90 | 1 |
| NC | $109.06 | 1 |
| ND | $114.51 | 1 |
| NE | $107.55 | 1 |
| NH | $119.28 | 1 |
| NJ | $125.33–$131.90 | 2 |
| NM | $108.94 | 1 |
| NV | $115.60 | 1 |
| NY | $110.73–$136.36 | 5 |
| OH | $108.13 | 1 |
| OK | $105.80 | 1 |
| OR | $114.85–$125.62 | 2 |
| PA | $108.43–$120.46 | 2 |
| PR | $116.85 | 1 |
| RI | $119.06 | 1 |
| SC | $108.75 | 1 |
| SD | $114.35 | 1 |
| TN | $106.67 | 1 |
| TX | $107.68–$120.87 | 8 |
| UT | $110.29 | 1 |
| VA | $113.69–$133.40 | 2 |
| VI | $116.85 | 1 |
| VT | $113.85 | 1 |
| WA | $120.40–$137.00 | 2 |
| WI | $110.52 | 1 |
| WV | $105.18 | 1 |
| WY | $115.29 | 1 |
How the 36598 rate is calculated
Each of 36598’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 · 36598
RVUs × geographic indexes × conversion factor
Work0.72
0.72 RVUs× 1.000 GPCI
Practice expense2.68
2.68 RVUs× 1.000 GPCI
Malpractice0.07
0.07 RVUs× 1.000 GPCI
Adjusted RVUs
3.4700
Conversion factor
$33.4009
Medicare rate
$115.90
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
The exact Marin County, CA inputs and CMS source lines
PPRRVU2026_Oct_nonQPP.csv
4,536
- Code
- 36598
- Physician work
- 0.72
- Practice expense
- 2.68
- Malpractice
- 0.07
GPCI2026.csv
25
- Locality
- Marin County, CA
- Physician work
- 1.095
- Practice expense
- 1.410
- Malpractice
- 0.459
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 0.72 | × 1.095 | 0.7884 |
| Practice expense | 2.68 | × 1.410 | 3.7788 |
| Malpractice | 0.07 | × 0.459 | 0.0321 |
| Total RVUs | 4.5993 | ||
| Conversion factor | × 33.4009 | ||
Office rate, Marin County, CA$153.62
Office: (0.72 × 1.095 + 2.68 × 1.41 + 0.07 × 0.459) × $33.4009 = $153.62
Facility: (0.72 × 1.095 + 0.12 × 1.41 + 0.07 × 0.459) × $33.4009 = $33.06
Payment rules and modifiers for 36598
The CMS indicators that decide how 36598 is paid alongside other services.
CMS payment indicators · 36598
Device evaluation, fluoroscopic contrast study
| Rule | CMS value | What it means |
|---|---|---|
| Global period | 000 | Same-day global: pre- and post-op care on the day of the procedure is included. |
| Multiple procedures | 2 | Standard reduction: highest-valued procedure at 100%, others at 50%. |
| Bilateral (modifier 50) | 1 | Bilateral with modifier 50 pays 150% of the fee schedule amount. |
| 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 | 9 | The concept doesn’t apply. |
What modifiers do to the payment
Modifier 50 · payment effect
With and without the modifier
36598 without 50 · national office
$115.90
Device evaluation, fluoroscopic contrast study
36598-50 · Bilateral: 150%
$173.85
Both sides on one line with modifier 50 are paid at 150% of the fee schedule amount (subject to multiple-procedure rules with other procedures).
How 36598 has changed in Marin County, CA
36598 · Office / nonfacility
$153.62
Effective 2026-10-01
The base rate is $3.65 higher than on 2025-10-01, moving from $149.97 to $153.62 (2.4%).
It is unchanged from the immediately preceding available release, effective 2026-07-01.
One bar per available release, ordered by effective date. Missing rates remain gaps. These comparisons hold the code, setting and locality identifiers constant; they do not isolate which policy or input caused a change.
What changed, release by release
January 1, 2026
RVU26A
$149.97changed to$153.62
- Conversion factor 32.3465 changed to 33.4009
- Work RVU 0.74 changed to 0.72
- Malpractice RVU 0.06 changed to 0.07
- Work GPCI 1.088 changed to 1.095
- Practice expense GPCI 1.419 changed to 1.410
- Malpractice GPCI 0.470 changed to 0.459
Held through RVU26B, RVU26C, RVU26D.
January 1, 2025
RVU25A
$157.32changed to$149.97
- Conversion factor 33.2875 changed to 32.3465
- Practice expense RVU 2.74 changed to 2.68
- Malpractice RVU 0.07 changed to 0.06
Held through RVU25B, RVU25C, RVU25D.
March 9, 2024
RVU24AR
$154.75changed to$157.32
- Conversion factor 32.7442 changed to 33.2875
Held through RVU24B, RVU24C, RVU24D.
January 1, 2024
RVU24A
$159.59changed to$154.75
- Conversion factor 33.8872 changed to 32.7442
- Practice expense RVU 2.82 changed to 2.74
- Work GPCI 1.082 changed to 1.088
- Practice expense GPCI 1.374 changed to 1.419
- Malpractice GPCI 0.487 changed to 0.470
January 1, 2023
RVU23A
$160.97changed to$159.59
- Conversion factor 34.6062 changed to 33.8872
- Practice expense RVU 2.87 changed to 2.82
- Malpractice RVU 0.08 changed to 0.07
- Work GPCI 1.077 changed to 1.082
- Practice expense GPCI 1.329 changed to 1.374
- Malpractice GPCI 0.504 changed to 0.487
Held through RVU23B, RVU23C, RVU23D.
January 1, 2022
RVU22A
$159.54changed to$160.97
- Conversion factor 34.8931 changed to 34.6062
- Practice expense RVU 2.86 changed to 2.87
- Malpractice RVU 0.06 changed to 0.08
- Work GPCI 1.071 changed to 1.077
- Practice expense GPCI 1.311 changed to 1.329
Held through RVU22B, RVU22C, RVU22D.
January 1, 2021
RVU21A
$152.74changed to$159.54
- Conversion factor 36.0896 changed to 34.8931
- Practice expense RVU 2.62 changed to 2.86
- Malpractice RVU 0.08 changed to 0.06
- Work GPCI 1.068 changed to 1.071
- Practice expense GPCI 1.299 changed to 1.311
- Malpractice GPCI 0.481 changed to 0.504
Held through RVU21B, RVU21C, RVU21D.
January 1, 2020
RVU20A
$145.41changed to$152.74
- Conversion factor 36.0391 changed to 36.0896
- Practice expense RVU 2.49 changed to 2.62
- Malpractice RVU 0.07 changed to 0.08
- Work GPCI 1.065 changed to 1.068
- Practice expense GPCI 1.291 changed to 1.299
- Malpractice GPCI 0.458 changed to 0.481
Held through RVU20B, RVU20C, RVU20D.
January 1, 2019
RVU19A
$138.57changed to$145.41
- Conversion factor 35.9996 changed to 36.0391
- Practice expense RVU 2.37 changed to 2.49
- Work GPCI 1.062 changed to 1.065
- Practice expense GPCI 1.279 changed to 1.291
Held through RVU19B, RVU19C, RVU19D.
January 1, 2018
RVU18AR1
$136.03changed to$138.57
- Conversion factor 35.8887 changed to 35.9996
- Practice expense RVU 2.34 changed to 2.37
- Work GPCI 1.058 changed to 1.062
- Practice expense GPCI 1.271 changed to 1.279
- Malpractice GPCI 0.477 changed to 0.458
Held through RVU18B, RVU18C, RVU18D.
January 1, 2017
RVU17A
No ratechanged to$136.03
Held through RVU17B, RVU17C, RVU17D.
January 1, 2013
RVU13AR
Earliest loaded release: No rate
Held through RVU13B, RVU13C, RVU13D, RVU14A, RVU14B, RVU14C, RVU14D, RVU15A, RVU15B, RVU15C, RVU15D, RVU16A, RVU16B, RVU16C, RVU16D.
| Effective from | Office | Facility | CMS release |
|---|---|---|---|
| 2026-10-01 | $153.62 | $33.06 | RVU26D |
| 2026-07-01 | $153.62 | $33.06 | RVU26C |
| 2026-04-01 | $153.62 | $33.06 | RVU26B |
| 2026-01-01 | $153.62 | $33.06 | RVU26A |
| 2025-10-01 | $149.97 | $37.97 | RVU25D |
| 2025-07-01 | $149.97 | $37.97 | RVU25C |
| 2025-04-01 | $149.97 | $37.97 | RVU25B |
| 2025-01-01 | $149.97 | $37.97 | RVU25A |
| 2024-10-01 | $157.32 | $38.76 | RVU24D |
| 2024-07-01 | $157.32 | $38.76 | RVU24C |
| 2024-04-01 | $157.32 | $38.76 | RVU24B |
| 2024-03-09 | $157.32 | $38.76 | RVU24AR |
| 2024-01-01 | $154.75 | $38.13 | RVU24A |
| 2023-10-01 | $159.59 | $39.46 | RVU23D |
| 2023-07-01 | $159.59 | $39.46 | RVU23C |
| 2023-04-01 | $159.59 | $39.46 | RVU23B |
| 2023-01-01 | $159.59 | $39.46 | RVU23A |
| 2022-10-01 | $160.97 | $40.01 | RVU22D |
| 2022-07-01 | $160.97 | $40.01 | RVU22C |
| 2022-04-01 | $160.97 | $40.01 | RVU22B |
| 2022-01-01 | $160.97 | $40.01 | RVU22A |
| 2021-10-01 | $159.54 | $39.69 | RVU21D |
| 2021-07-01 | $159.54 | $39.69 | RVU21C |
| 2021-04-01 | $159.54 | $39.69 | RVU21B |
| 2021-01-01 | $159.54 | $39.69 | RVU21A |
| 2020-10-01 | $152.74 | $41.63 | RVU20D |
| 2020-07-01 | $152.74 | $41.63 | RVU20C |
| 2020-04-01 | $152.74 | $41.63 | RVU20B |
| 2020-01-01 | $152.74 | $41.63 | RVU20A |
| 2019-10-01 | $145.41 | $41.19 | RVU19D |
| 2019-07-01 | $145.41 | $41.19 | RVU19C |
| 2019-04-01 | $145.41 | $41.19 | RVU19B |
| 2019-01-01 | $145.41 | $41.19 | RVU19A |
| 2018-10-01 | $138.57 | $40.96 | RVU18D |
| 2018-07-01 | $138.57 | $40.96 | RVU18C |
| 2018-04-01 | $138.57 | $40.96 | RVU18B |
| 2018-01-01 | $138.57 | $40.96 | RVU18AR1 |
| 2017-10-01 | $136.03 | $41.16 | RVU17D |
| 2017-07-01 | $136.03 | $41.16 | RVU17C |
| 2017-04-01 | $136.03 | $41.16 | RVU17B |
| 2017-01-01 | $136.03 | $41.16 | RVU17A |
| 2016-10-01 | Rate data unavailable | Rate data unavailable | RVU16D |
| 2016-07-01 | Rate data unavailable | Rate data unavailable | RVU16C |
| 2016-04-01 | Rate data unavailable | Rate data unavailable | RVU16B |
| 2016-01-01 | Rate data unavailable | Rate data unavailable | RVU16A |
| 2015-10-01 | Rate data unavailable | Rate data unavailable | RVU15D |
| 2015-07-01 | Rate data unavailable | Rate data unavailable | RVU15C |
| 2015-04-01 | Rate data unavailable | Rate data unavailable | RVU15B |
| 2015-01-01 | Rate data unavailable | Rate data unavailable | RVU15A |
| 2014-10-01 | Rate data unavailable | Rate data unavailable | RVU14D |
| 2014-07-01 | Rate data unavailable | Rate data unavailable | RVU14C |
| 2014-04-01 | Rate data unavailable | Rate data unavailable | RVU14B |
| 2014-01-01 | Rate data unavailable | Rate data unavailable | RVU14A |
| 2013-10-01 | Rate data unavailable | Rate data unavailable | RVU13D |
| 2013-07-01 | Rate data unavailable | Rate data unavailable | RVU13C |
| 2013-04-01 | Rate data unavailable | Rate data unavailable | RVU13B |
| 2013-01-01 | Rate data unavailable | Rate data unavailable | RVU13AR |
Where the Marin County, CA rate applies
Marin County, CA is a Medicare payment area, not a city. Our Census mapping connects it to 31 cities and communities in California. Some span more than one payment area; confirm with the service ZIP.
- Alto
- Belvedere
- Black Point-Green Point
- Bolinas
- Corte Madera
- Dillon Beach
- Fairfax
- Inverness
36598 billing questions
When should I report 36598 instead of 36597?
Report 36598 for contrast injection and fluoroscopic evaluation of an existing device. Report 36597 when the catheter is actually repositioned.
Does 36598 include the fluoroscopic imaging?
Fluoroscopy is part of the device evaluation described by this code. Do not separately report fluoroscopic imaging for the same study.
Is 36598 payable with another physician service on the same date?
CMS payment for this injection or minor service is limited to days when no other physician service is billed.
What documentation supports 36598?
Document the existing device, the clinical concern prompting evaluation, the contrast injection, and the fluoroscopic findings.
Can an assistant or co-surgeon be reported?
Assistant-at-surgery payment requires documentation of medical necessity. CMS does not permit co-surgeons or team surgery for this service.
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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