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CPT code 36224: Carotid angiography, internal carotid, both circulations2026 Medicare rate & RVUs in South Carolina

Reports selective catheter angiography of one internal carotid artery when images document both the ipsilateral extracranial and intracranial circulation.

CMS RVU26DEffective Oct 1, 2026One payment locality24.1K Medicare services in 2024

In South Carolina, Medicare pays $2,182.40 for 36224 in the office and $317.39 when it’s performed in a hospital or facility.

$2,182.40Office (non-facility)
$317.39Hospital or facility
−7.1%vs the national office rate ($2,350.42)

Check a contract rate as a % of Medicare · 36224 nationwide

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

We’ll open 36224 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in South Carolina
  2. What 36224 covers
  3. Compared with other areas
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Related codes
  8. Rate history
  9. Where it applies
  10. Billing questions
  11. Sources

What 36224 covers

A physician advances a catheter selectively into an internal carotid artery and injects contrast to image that side’s extracranial and intracranial carotid circulation. Arch and cervical carotid imaging may be included when performed. Neurointerventional and diagnostic radiologists commonly perform the study in a hospital angiography suite; the service represents diagnostic imaging, not catheter placement alone.

Report the code when the record supports selective internal carotid catheterization, imaging of both circulation regions, and an interpretation of the findings. The 0-day global period includes same-day preoperative and postoperative care. When multiple procedures occur in one session, the highest-valued procedure is paid in full and the others at 50%. Bilateral reporting with modifier 50 is paid at 150%. CMS does not pay an assistant at surgery; 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 South Carolina compares for 36224

Across 109 of 109 payment localities, the office rate for 36224 runs from $2,025.17 in Arkansas to $3,262.46 in San Benito County, CA. South Carolina pays $2,182.40. The RVUs are the same everywhere; the geographic indexes change the dollars.

36224 in South Carolina vs other payment areas
  1. South Carolina · this page$2,182.40
  2. Los Angeles, CA · California$2,717.69+$535.29
  3. Washington, DC area · District of Columbia$2,739.32+$556.92
  4. Miami, FL · Florida$2,535.86+$353.46
  5. Chicago, IL · Illinois$2,447.03+$264.63
  6. Manhattan, NY · New York$2,739.01+$556.61
  7. Alaska · Alaska$2,558.03+$375.63

Other areas in South Carolina first, then benchmark localities. Bars start at $0.

Every other payment area

36224 in every other Medicare payment locality
Payment localityOfficeFacility
AlabamaAlabama$2,061.82$295.70
ArkansasArkansas$2,025.17$291.35
ArizonaArizona$2,276.47$320.62
Bakersfield, CACalifornia$2,528.52$316.33
Chico, CACalifornia$2,523.33$311.15
El Centro, CACalifornia$2,523.66$311.47
Fresno, CACalifornia$2,523.33$311.15
Hanford, CACalifornia$2,523.33$311.15

36224 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.

$2,025.17

$2,892.90

Color shows the midpoint of each state’s locality range.

View every state and territory as a table
36224 office rate range by state
State / territoryOffice rate rangeLocalities
AK$2,558.031
AL$2,061.821
AR$2,025.171
AZ$2,276.471
CA$2,523.33–$3,262.4629
CO$2,471.741
CT$2,528.521
DC$2,739.321
DE$2,319.851
FL$2,291.76–$2,535.863
GA$2,138.18–$2,397.492
GU$2,608.031
HI$2,608.031
IA$2,134.011
ID$2,149.401
IL$2,206.18–$2,458.594
IN$2,164.821
KS$2,118.121
KY$2,113.811
LA$2,108.29–$2,236.512
MA$2,450.71–$2,755.382
MD$2,372.07–$2,739.323
ME$2,159.15–$2,307.532
MI$2,177.77–$2,322.482
MN$2,364.701
MO$2,061.47–$2,250.643
MS$2,044.001
MT$2,350.291
NC$2,187.321
ND$2,311.531
NE$2,149.421
NH$2,427.581
NJ$2,556.41–$2,700.732
NM$2,190.811
NV$2,341.571
NY$2,226.90–$2,812.965
OH$2,169.851
OK$2,113.101
OR$2,322.65–$2,567.972
PA$2,176.13–$2,452.062
PR$2,372.341
RI$2,415.911
SC$2,182.401
SD$2,306.951
TN$2,130.691
TX$2,158.43–$2,464.098
UT$2,218.851
VA$2,295.79–$2,739.322
VI$2,372.341
VT$2,297.271
WA$2,447.74–$2,821.122
WI$2,217.691
WV$2,105.951
WY$2,333.401

See 36224 in every payment locality

How the 36224 rate is calculated

Each of 36224’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 · 36224

RVUs × geographic indexes × conversion factor

Office or facility?

Work6.09

6.09 RVUs× 1.000 GPCI

Practice expense62.32

62.32 RVUs× 1.000 GPCI

Malpractice1.96

1.96 RVUs× 1.000 GPCI

Adjusted RVUs

70.3700

Conversion factor

$33.4009

Medicare rate

$2,350.42

Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.

The exact South Carolina inputs and CMS source lines

PPRRVU2026_Oct_nonQPP.csv

4,450

Code
36224
Physician work
6.09
Practice expense
62.32
Malpractice
1.96

GPCI2026.csv

93

Locality
South Carolina
Physician work
1.000
Practice expense
0.924
Malpractice
0.850
Office calculation for 36224 in South Carolina
ComponentRVULocality factorAdjusted
Physician work6.09× 1.0006.0900
Practice expense62.32× 0.92457.5837
Malpractice1.96× 0.8501.6660
Total RVUs65.3397
Conversion factor× 33.4009

Office rate, South Carolina$2182.40

Office: (6.09 × 1 + 62.32 × 0.924 + 1.96 × 0.85) × $33.4009 = $2182.40

Facility: (6.09 × 1 + 1.89 × 0.924 + 1.96 × 0.85) × $33.4009 = $317.39

Open 36224 in the RVU calculator

Payment rules and modifiers for 36224

The CMS indicators that decide how 36224 is paid alongside other services.

CMS payment indicators · 36224

Carotid angiography, internal carotid, both circulations

RuleCMS valueWhat it means
Global period000Same-day global: pre- and post-op care on the day of the procedure is included.
Multiple procedures2Standard reduction: highest-valued procedure at 100%, others at 50%.
Bilateral (modifier 50)1Bilateral with modifier 50 pays 150% of the fee schedule amount.
Assistant at surgery (80/81/82/AS)1Not paid (statutory restriction).
Co-surgeons (62)0Not permitted.
Team surgery (66)0Not permitted.
Professional/technical0Physician service: no professional/technical split.

What modifiers do to the payment

Modifier 50 · payment effect

With and without the modifier

36224 without 50 · national office

$2,350.42

Carotid angiography, internal carotid, both circulations

36224-50 · Bilateral: 150%

$3,525.63

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).

When to use modifier 50

Codes related to 36224

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

Codes related to 36224
CodeHow it relatesOffice range, South Carolina
Same family
36223Carotid angiography, ipsilateral intracranial circulationCervicocerebral angiography with selective catheter placement in the common carotid or innominate artery.$1,779.97
36222Carotid angiography, common carotid, extracranialCarotid angiography from common carotid or innominate placement, with a different imaging scope.$1,173.66
Used instead
36226Vertebral angiography, direct vertebral selectionUsed for selective vertebral artery angiography rather than internal carotid circulation.$2,122.94
Add-on codes
36228Intracranial catheterization, additional intracranial branchAdditional selective intracranial branch catheterization and angiography may be reported with this study.$1,430.97

How 36224 has changed in South Carolina

36224 · Office / nonfacility

$2182.40

Effective 2026-10-01

The base rate is $389.41 higher than on 2025-10-01, moving from $1792.99 to $2182.40 (21.7%).

It is unchanged from the immediately preceding available release, effective 2026-07-01.

Base rate by release · bars start at $0 · select a bar to compare

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

  1. January 1, 2026

    RVU26A

    $1792.99changed to$2182.40

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 6.25 changed to 6.09
    • Practice expense RVU 52.14 changed to 62.32
    • Malpractice RVU 1.93 changed to 1.96
    • Practice expense GPCI 0.913 changed to 0.924
    • Malpractice GPCI 0.817 changed to 0.850

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    $1874.39changed to$1792.99

    • Conversion factor 33.2875 changed to 32.3465
    • Practice expense RVU 53.12 changed to 52.14
    • Malpractice RVU 1.91 changed to 1.93

    Held through RVU25B, RVU25C, RVU25D.

  3. March 9, 2024

    RVU24AR

    $1843.79changed to$1874.39

    • Conversion factor 32.7442 changed to 33.2875

    Held through RVU24B, RVU24C, RVU24D.

  4. January 1, 2024

    RVU24A

    $1896.18changed to$1843.79

    • Conversion factor 33.8872 changed to 32.7442
    • Practice expense RVU 53.21 changed to 53.12
    • Malpractice RVU 1.84 changed to 1.91
    • Practice expense GPCI 0.908 changed to 0.913
    • Malpractice GPCI 0.756 changed to 0.817

  5. January 1, 2023

    RVU23A

    $1931.98changed to$1896.18

    • Conversion factor 34.6062 changed to 33.8872
    • Practice expense RVU 53.61 changed to 53.21
    • Malpractice RVU 1.68 changed to 1.84
    • Practice expense GPCI 0.903 changed to 0.908
    • Malpractice GPCI 0.695 changed to 0.756

    Held through RVU23B, RVU23C, RVU23D.

  6. January 1, 2022

    RVU22A

    $2010.18changed to$1931.98

    • Conversion factor 34.8931 changed to 34.6062
    • Practice expense RVU 55.63 changed to 53.61
    • Malpractice RVU 1.62 changed to 1.68

    Held through RVU22B, RVU22C, RVU22D.

  7. January 1, 2021

    RVU21A

    $1933.91changed to$2010.18

    • Conversion factor 36.0896 changed to 34.8931
    • Practice expense RVU 51.11 changed to 55.63
    • Malpractice RVU 1.57 changed to 1.62
    • Practice expense GPCI 0.907 changed to 0.903
    • Malpractice GPCI 0.624 changed to 0.695

    Held through RVU21B, RVU21C, RVU21D.

  8. January 1, 2020

    RVU20A

    $1867.40changed to$1933.91

    • Conversion factor 36.0391 changed to 36.0896
    • Practice expense RVU 48.95 changed to 51.11
    • Malpractice RVU 1.67 changed to 1.57
    • Practice expense GPCI 0.912 changed to 0.907
    • Malpractice GPCI 0.553 changed to 0.624

    Held through RVU20B, RVU20C, RVU20D.

  9. January 1, 2019

    RVU19A

    $1790.54changed to$1867.40

    • Conversion factor 35.9996 changed to 36.0391
    • Practice expense RVU 46.72 changed to 48.95
    • Malpractice RVU 1.59 changed to 1.67

    Held through RVU19B, RVU19C, RVU19D.

  10. January 1, 2018

    RVU18AR1

    $1750.77changed to$1790.54

    • Conversion factor 35.8887 changed to 35.9996
    • Practice expense RVU 45.56 changed to 46.72
    • Malpractice RVU 1.55 changed to 1.59
    • Malpractice GPCI 0.634 changed to 0.553

    Held through RVU18B, RVU18C, RVU18D.

  11. January 1, 2017

    RVU17A

    $1697.97changed to$1750.77

    • Conversion factor 35.8043 changed to 35.8887
    • Work RVU 6.50 changed to 6.25
    • Practice expense RVU 43.72 changed to 45.56
    • Malpractice RVU 1.47 changed to 1.55
    • Malpractice GPCI 0.715 changed to 0.634

    Held through RVU17B, RVU17C, RVU17D.

  12. January 1, 2016

    RVU16A

    $1778.95changed to$1697.97

    • Conversion factor 35.9335 changed to 35.8043
    • Practice expense RVU 45.91 changed to 43.72
    • Malpractice RVU 1.59 changed to 1.47

    Held through RVU16B, RVU16C, RVU16D.

  13. July 1, 2015

    RVU15C

    $1770.10changed to$1778.95

    • Conversion factor 35.7547 changed to 35.9335

    Held through RVU15D.

  14. January 1, 2015

    RVU15A

    $1571.92changed to$1770.10

    • Conversion factor 35.8228 changed to 35.7547
    • Practice expense RVU 40.32 changed to 45.91
    • Malpractice RVU 1.05 changed to 1.59
    • Practice expense GPCI 0.911 changed to 0.912
    • Malpractice GPCI 0.618 changed to 0.715

    Held through RVU15B.

  15. January 1, 2014

    RVU14A

    $1565.21changed to$1571.92

    • Conversion factor 34.0230 changed to 35.8228
    • Practice expense RVU 42.83 changed to 40.32
    • Malpractice RVU 1.10 changed to 1.05
    • Practice expense GPCI 0.909 changed to 0.911
    • Malpractice GPCI 0.520 changed to 0.618

    Held through RVU14B, RVU14C, RVU14D.

  16. January 1, 2013

    RVU13AR

    Earliest loaded release: $1565.21

    Held through RVU13B, RVU13C, RVU13D.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$2,182.40$317.39RVU26D
2026-07-01$2,182.40$317.39RVU26C
2026-04-01$2,182.40$317.39RVU26B
2026-01-01$2,182.40$317.39RVU26A
2025-10-01$1,792.99$337.63RVU25D
2025-07-01$1,792.99$337.63RVU25C
2025-04-01$1,792.99$337.63RVU25B
2025-01-01$1,792.99$337.63RVU25A
2024-10-01$1,874.39$344.18RVU24D
2024-07-01$1,874.39$344.18RVU24C
2024-04-01$1,874.39$344.18RVU24B
2024-03-09$1,874.39$344.18RVU24AR
2024-01-01$1,843.79$338.56RVU24A
2023-10-01$1,896.18$343.24RVU23D
2023-07-01$1,896.18$343.24RVU23C
2023-04-01$1,896.18$343.24RVU23B
2023-01-01$1,896.18$343.24RVU23A
2022-10-01$1,931.98$341.07RVU22D
2022-07-01$1,931.98$341.07RVU22C
2022-04-01$1,931.98$341.07RVU22B
2022-01-01$1,931.98$341.07RVU22A
2021-10-01$2,010.18$341.81RVU21D
2021-07-01$2,010.18$341.81RVU21C
2021-04-01$2,010.18$341.81RVU21B
2021-01-01$2,010.18$341.81RVU21A
2020-10-01$1,933.91$346.35RVU20D
2020-07-01$1,933.91$346.35RVU20C
2020-04-01$1,933.91$346.35RVU20B
2020-01-01$1,933.91$346.35RVU20A
2019-10-01$1,867.40$342.67RVU19D
2019-07-01$1,867.40$342.67RVU19C
2019-04-01$1,867.40$342.67RVU19B
2019-01-01$1,867.40$342.67RVU19A
2018-10-01$1,790.54$339.71RVU18D
2018-07-01$1,790.54$339.71RVU18C
2018-04-01$1,790.54$339.71RVU18B
2018-01-01$1,790.54$339.71RVU18AR1
2017-10-01$1,750.77$342.05RVU17D
2017-07-01$1,750.77$342.05RVU17C
2017-04-01$1,750.77$342.05RVU17B
2017-01-01$1,750.77$342.05RVU17A
2016-10-01$1,697.97$352.65RVU16D
2016-07-01$1,697.97$352.65RVU16C
2016-04-01$1,697.97$352.65RVU16B
2016-01-01$1,697.97$352.65RVU16A
2015-10-01$1,778.95$358.97RVU15D
2015-07-01$1,778.95$358.97RVU15C
2015-04-01$1,770.10$357.18RVU15B
2015-01-01$1,770.10$357.18RVU15A
2014-10-01$1,571.92$336.05RVU14D
2014-07-01$1,571.92$336.05RVU14C
2014-04-01$1,571.92$336.05RVU14B
2014-01-01$1,571.92$336.05RVU14A
2013-10-01$1,565.21$320.09RVU13D
2013-07-01$1,565.21$320.09RVU13C
2013-04-01$1,565.21$320.09RVU13B
2013-01-01$1,565.21$320.09RVU13AR

Price 36224 for an earlier date of service

Where the South Carolina rate applies

South Carolina is a Medicare payment area, not a city. Our Census mapping connects it to 475 cities and communities in South Carolina. Some span more than one payment area; confirm with the service ZIP.

  • Abbeville
  • Abney Crossroads
  • Adams Run
  • Aiken
  • Alcolu
  • Allendale
  • Anderson
  • Andrews

Browse all communities in South Carolina

36224 billing questions

Does catheter placement alone support 36224?

No. The study includes angiography of the ipsilateral extracranial and intracranial carotid circulation; catheter placement without that imaging does not describe the service.

When should 36223 be considered instead?

Use 36223 when the selective catheter position is in the common carotid or innominate artery and the documented imaging meets that code’s criteria. 36224 is for selective placement in the internal carotid artery.

What documentation supports reporting 36224?

Document the side, selective internal carotid catheter position, imaging of both the ipsilateral extracranial and intracranial circulation, and the angiographic interpretation.

How is bilateral internal carotid angiography paid?

CMS identifies this as a bilateral procedure; reporting modifier 50 is paid at 150%.

Are same-day services included in the global period?

Yes. The 0-day global period includes same-day preoperative and postoperative care.

Can an assistant or co-surgeon be reported?

CMS does not pay an assistant at surgery for this procedure. Co-surgeons and team surgery are not permitted.

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
RVUs for 36224PPRRVU2026_Oct_nonQPP.csv, line 4,450 (RVU26D)
Geographic factors for South CarolinaGPCI2026.csv, line 93 (RVU26D)

Open CMS sourceHow we calculate rates

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