CPT code 36228: Intracranial catheterization, additional intracranial branch2026 Medicare rate & RVUs in Montana
Reports selective catheter placement and angiography of an additional intracranial branch, such as an anterior or middle cerebral artery branch, during cerebral angiography.
In Montana, Medicare pays $1,541.02 for 36228 in the office and $224.69 when it’s performed in a hospital or facility.
Check a contract rate as a % of Medicare · 36228 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 36228 covers
This add-on describes selective catheterization of an additional second- or third-order intracranial branch within a vascular family, with angiography of the selected vessel and its supplied intracranial branches when performed. Neurointerventional physicians and other physicians performing diagnostic cerebral angiography may use it when they advance the catheter beyond an internal carotid or vertebral artery into a qualifying intracranial branch. The service is commonly performed in a hospital angiography suite.
Report 36228 with the applicable primary angiography service, commonly 36224 for an internal carotid artery study or 36226 for a vertebral artery study; it is not reported alone. Documentation should identify the vascular family, the additional branch selectively catheterized, and the angiography performed. Report the code for each qualifying additional branch. It is an add-on paid within the primary procedure's global period. For a bilateral procedure reported with modifier 50, CMS pays 150% of the single-procedure amount.
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 Montana compares for 36228
Across 109 of 109 payment localities, the office rate for 36228 runs from $1,326.89 in Arkansas to $2,133.11 in San Benito County, CA. Montana pays $1,541.02. The RVUs are the same everywhere; the geographic indexes change the dollars.
- Montana · this page$1,541.02
- Los Angeles, CA · California$1,778.72+$237.70
- Washington, DC area · District of Columbia$1,795.19+$254.17
- Miami, FL · Florida$1,669.71+$128.69
- Chicago, IL · Illinois$1,610.71+$69.69
- Manhattan, NY · New York$1,797.48+$256.46
- Alaska · Alaska$1,676.89+$135.87
Other areas in Montana first, then benchmark localities. Bars start at $0.
Every other payment area
| Payment locality | Office | Facility |
|---|---|---|
| AlabamaAlabama | $1,351.00 | $199.22 |
| ArkansasArkansas | $1,326.89 | $196.16 |
| ArizonaArizona | $1,492.23 | $216.71 |
| Bakersfield, CACalifornia | $1,655.16 | $212.46 |
| Chico, CACalifornia | $1,651.39 | $208.70 |
| El Centro, CACalifornia | $1,651.63 | $208.93 |
| Fresno, CACalifornia | $1,651.39 | $208.70 |
| Hanford, CACalifornia | $1,651.39 | $208.70 |
| Madera, CACalifornia | $1,651.39 | $208.70 |
| Merced, CACalifornia | $1,651.39 | $208.70 |
| Modesto, CACalifornia | $1,651.39 | $208.70 |
| Napa, CACalifornia | $1,957.24 | $222.32 |
| Oxnard, CACalifornia | $1,773.61 | $217.70 |
| Redding, CACalifornia | $1,651.39 | $208.70 |
| Rest of CaliforniaCalifornia | $1,651.39 | $208.70 |
| Riverside, CACalifornia | $1,666.67 | $223.98 |
| Sacramento, CACalifornia | $1,744.81 | $213.92 |
| Salinas, CACalifornia | $1,738.70 | $213.07 |
| San Diego, CACalifornia | $1,788.98 | $214.65 |
| Marin County, CACalifornia | $2,083.99 | $227.97 |
| San Francisco, CACalifornia | $2,082.37 | $226.35 |
| San Benito County, CACalifornia | $2,133.11 | $234.96 |
| Santa Clara County, CACalifornia | $2,126.47 | $228.32 |
| San Luis Obispo, CACalifornia | $1,709.66 | $210.36 |
| Santa Cruz, CACalifornia | $1,813.20 | $213.86 |
| Santa Maria, CACalifornia | $1,747.77 | $212.93 |
| Santa Rosa, CACalifornia | $1,832.06 | $215.61 |
| Stockton, CACalifornia | $1,651.39 | $208.70 |
| Vallejo, CACalifornia | $1,954.90 | $219.98 |
| Visalia, CACalifornia | $1,651.39 | $208.70 |
| Yuba City, CACalifornia | $1,651.39 | $208.70 |
| ColoradoColorado | $1,619.04 | $218.47 |
| ConnecticutConnecticut | $1,658.25 | $240.57 |
| DelawareDelaware | $1,520.72 | $220.19 |
| Fort Lauderdale, FLFlorida | $1,597.33 | $263.88 |
| Rest of FloridaFlorida | $1,505.52 | $247.11 |
| Atlanta, GAGeorgia | $1,572.81 | $235.42 |
| Rest of GeorgiaGeorgia | $1,403.94 | $229.77 |
| Hawaii, Guam, HIHawaii | $1,706.65 | $209.99 |
| IowaIowa | $1,397.13 | $192.69 |
| IdahoIdaho | $1,407.54 | $196.52 |
| East St. Louis, ILIllinois | $1,481.14 | $270.12 |
| Rest of IllinoisIllinois | $1,450.12 | $248.31 |
| Suburban Chicago, ILIllinois | $1,615.55 | $263.68 |
| IndianaIndiana | $1,417.65 | $197.41 |
| KansasKansas | $1,387.34 | $197.38 |
| KentuckyKentucky | $1,386.64 | $216.43 |
| New Orleans, LALouisiana | $1,467.66 | $229.00 |
| Rest of LouisianaLouisiana | $1,383.28 | $218.33 |
| Metropolitan Boston, MAMassachusetts | $1,804.42 | $232.72 |
| Rest of MassachusettsMassachusetts | $1,605.45 | $219.36 |
| Baltimore area, MDMaryland | $1,653.57 | $241.15 |
| Rest of MarylandMaryland | $1,554.84 | $222.72 |
| Rest of MaineMaine | $1,414.66 | $203.63 |
| Southern Maine, MEMaine | $1,511.30 | $206.81 |
| Detroit, MIMichigan | $1,526.46 | $256.20 |
| Rest of MichiganMichigan | $1,429.39 | $227.58 |
| MinnesotaMinnesota | $1,546.79 | $192.29 |
| Metropolitan Kansas City, MOMissouri | $1,457.36 | $221.33 |
| Metropolitan St. Louis, MOMissouri | $1,476.17 | $223.02 |
| Rest of MissouriMissouri | $1,352.88 | $218.20 |
| MississippiMississippi | $1,340.30 | $206.94 |
| North CarolinaNorth Carolina | $1,433.08 | $204.95 |
| North DakotaNorth Dakota | $1,512.75 | $196.42 |
| NebraskaNebraska | $1,407.07 | $192.10 |
| New HampshireNew Hampshire | $1,590.71 | $220.41 |
| Northern New JerseyNew Jersey | $1,769.89 | $242.95 |
| Rest of New JerseyNew Jersey | $1,675.95 | $238.52 |
| New MexicoNew Mexico | $1,438.25 | $231.17 |
| NevadaNevada | $1,534.50 | $216.85 |
| NYC suburbs and Long Island, NYNew York | $1,847.01 | $281.89 |
| Poughkeepsie and northern NYC suburbs, NYNew York | $1,686.10 | $244.72 |
| Queens, NYNew York | $1,817.70 | $261.80 |
| Rest of New YorkNew York | $1,459.18 | $208.67 |
| OhioOhio | $1,423.61 | $221.80 |
| OklahomaOklahoma | $1,385.47 | $209.99 |
| Portland, OROregon | $1,681.52 | $219.07 |
| Rest of OregonOregon | $1,521.51 | $210.45 |
| Metropolitan Philadelphia, PAPennsylvania | $1,608.38 | $238.08 |
| Rest of PennsylvaniaPennsylvania | $1,427.37 | $218.98 |
| Puerto RicoPuerto Rico | $1,555.31 | $224.50 |
| Rhode IslandRhode Island | $1,583.30 | $223.54 |
| South CarolinaSouth Carolina | $1,430.97 | $214.68 |
| South DakotaSouth Dakota | $1,509.40 | $193.07 |
| TennesseeTennessee | $1,395.69 | $199.15 |
| Austin, TXTexas | $1,614.54 | $221.87 |
| Beaumont, TXTexas | $1,415.77 | $217.91 |
| Brazoria, TXTexas | $1,519.52 | $215.04 |
| Dallas, TXTexas | $1,530.16 | $219.10 |
| Fort Worth, TXTexas | $1,517.23 | $219.33 |
| Galveston, TXTexas | $1,524.52 | $217.41 |
| Houston, TXTexas | $1,550.70 | $243.58 |
| Rest of TexasTexas | $1,467.38 | $218.18 |
| UtahUtah | $1,454.94 | $217.59 |
| VirginiaVirginia | $1,504.04 | $210.09 |
| Virgin Islands, VIUnited States Virgin Islands | $1,555.31 | $224.50 |
| VermontVermont | $1,503.97 | $200.81 |
| Rest of WashingtonWashington | $1,603.32 | $217.22 |
| King County, WAWashington | $1,846.89 | $231.76 |
| WisconsinWisconsin | $1,451.15 | $190.11 |
| West VirginiaWest Virginia | $1,384.19 | $240.30 |
| WyomingWyoming | $1,528.70 | $212.37 |
36228 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.
$1,326.89
$1,892.25
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 | $1,676.89 | 1 |
| AL | $1,351.00 | 1 |
| AR | $1,326.89 | 1 |
| AZ | $1,492.23 | 1 |
| CA | $1,651.39–$2,133.11 | 29 |
| CO | $1,619.04 | 1 |
| CT | $1,658.25 | 1 |
| DC | $1,795.19 | 1 |
| DE | $1,520.72 | 1 |
| FL | $1,505.52–$1,669.71 | 3 |
| GA | $1,403.94–$1,572.81 | 2 |
| GU | $1,706.65 | 1 |
| HI | $1,706.65 | 1 |
| IA | $1,397.13 | 1 |
| ID | $1,407.54 | 1 |
| IL | $1,450.12–$1,615.55 | 4 |
| IN | $1,417.65 | 1 |
| KS | $1,387.34 | 1 |
| KY | $1,386.64 | 1 |
| LA | $1,383.28–$1,467.66 | 2 |
| MA | $1,605.45–$1,804.42 | 2 |
| MD | $1,554.84–$1,795.19 | 3 |
| ME | $1,414.66–$1,511.30 | 2 |
| MI | $1,429.39–$1,526.46 | 2 |
| MN | $1,546.79 | 1 |
| MO | $1,352.88–$1,476.17 | 3 |
| MS | $1,340.30 | 1 |
| MT | $1,541.02 | 1 |
| NC | $1,433.08 | 1 |
| ND | $1,512.75 | 1 |
| NE | $1,407.07 | 1 |
| NH | $1,590.71 | 1 |
| NJ | $1,675.95–$1,769.89 | 2 |
| NM | $1,438.25 | 1 |
| NV | $1,534.50 | 1 |
| NY | $1,459.18–$1,847.01 | 5 |
| OH | $1,423.61 | 1 |
| OK | $1,385.47 | 1 |
| OR | $1,521.51–$1,681.52 | 2 |
| PA | $1,427.37–$1,608.38 | 2 |
| PR | $1,555.31 | 1 |
| RI | $1,583.30 | 1 |
| SC | $1,430.97 | 1 |
| SD | $1,509.40 | 1 |
| TN | $1,395.69 | 1 |
| TX | $1,415.77–$1,614.54 | 8 |
| UT | $1,454.94 | 1 |
| VA | $1,504.04–$1,795.19 | 2 |
| VI | $1,555.31 | 1 |
| VT | $1,503.97 | 1 |
| WA | $1,603.32–$1,846.89 | 2 |
| WI | $1,451.15 | 1 |
| WV | $1,384.19 | 1 |
| WY | $1,528.70 | 1 |
How the 36228 rate is calculated
Each of 36228’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 · 36228
RVUs × geographic indexes × conversion factor
Work4.14
4.14 RVUs× 1.000 GPCI
Practice expense40.57
40.57 RVUs× 1.000 GPCI
Malpractice1.43
1.43 RVUs× 1.000 GPCI
Adjusted RVUs
46.1400
Conversion factor
$33.4009
Medicare rate
$1,541.12
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
The exact Montana inputs and CMS source lines
PPRRVU2026_Oct_nonQPP.csv
4,454
- Code
- 36228
- Physician work
- 4.14
- Practice expense
- 40.57
- Malpractice
- 1.43
GPCI2026.csv
71
- Locality
- Montana
- Physician work
- 1.000
- Practice expense
- 1.000
- Malpractice
- 0.998
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 4.14 | × 1.000 | 4.1400 |
| Practice expense | 40.57 | × 1.000 | 40.5700 |
| Malpractice | 1.43 | × 0.998 | 1.4271 |
| Total RVUs | 46.1371 | ||
| Conversion factor | × 33.4009 | ||
Office rate, Montana$1541.02
Office: (4.14 × 1 + 40.57 × 1 + 1.43 × 0.998) × $33.4009 = $1541.02
Facility: (4.14 × 1 + 1.16 × 1 + 1.43 × 0.998) × $33.4009 = $224.69
Payment rules and modifiers for 36228
The CMS indicators that decide how 36228 is paid alongside other services.
CMS payment indicators · 36228
Intracranial catheterization, additional intracranial branch
| 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) | 1 | Bilateral with modifier 50 pays 150% of the fee schedule amount. |
| Assistant at surgery (80/81/82/AS) | 1 | Not paid (statutory restriction). |
| 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 50 · payment effect
With and without the modifier
36228 without 50 · national office
$1,541.12
Intracranial catheterization, additional intracranial branch
36228-50 · Bilateral: 150%
$2,311.68
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 36228 has changed in Montana
36228 · Office / nonfacility
$1541.02
Effective 2026-10-01
The base rate is $291.82 higher than on 2025-10-01, moving from $1249.20 to $1541.02 (23.4%).
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
$1249.20changed to$1541.02
- Conversion factor 32.3465 changed to 33.4009
- Work RVU 4.25 changed to 4.14
- Practice expense RVU 33.01 changed to 40.57
- Malpractice RVU 1.39 changed to 1.43
- Malpractice GPCI 0.978 changed to 0.998
Held through RVU26B, RVU26C, RVU26D.
January 1, 2025
RVU25A
$1280.91changed to$1249.20
- Conversion factor 33.2875 changed to 32.3465
- Practice expense RVU 32.90 changed to 33.01
- Malpractice RVU 1.36 changed to 1.39
Held through RVU25B, RVU25C, RVU25D.
March 9, 2024
RVU24AR
$1260.00changed to$1280.91
- Conversion factor 32.7442 changed to 33.2875
Held through RVU24B, RVU24C, RVU24D.
January 1, 2024
RVU24A
$1281.00changed to$1260.00
- Conversion factor 33.8872 changed to 32.7442
- Practice expense RVU 32.30 changed to 32.90
- Malpractice RVU 1.28 changed to 1.36
January 1, 2023
RVU23A
$1322.75changed to$1281.00
- Conversion factor 34.6062 changed to 33.8872
- Practice expense RVU 32.82 changed to 32.30
- Malpractice RVU 1.18 changed to 1.28
- Malpractice GPCI 0.977 changed to 0.978
Held through RVU23B, RVU23C, RVU23D.
January 1, 2022
RVU22A
$1386.45changed to$1322.75
- Conversion factor 34.8931 changed to 34.6062
- Practice expense RVU 34.39 changed to 32.82
- Malpractice RVU 1.12 changed to 1.18
Held through RVU22B, RVU22C, RVU22D.
January 1, 2021
RVU21A
$1371.23changed to$1386.45
- Conversion factor 36.0896 changed to 34.8931
- Practice expense RVU 32.35 changed to 34.39
- Malpractice RVU 1.07 changed to 1.12
- Malpractice GPCI 1.304 changed to 0.977
Held through RVU21B, RVU21C, RVU21D.
January 1, 2020
RVU20A
$1382.44changed to$1371.23
- Conversion factor 36.0391 changed to 36.0896
- Practice expense RVU 32.25 changed to 32.35
- Malpractice RVU 1.14 changed to 1.07
- Malpractice GPCI 1.631 changed to 1.304
Held through RVU20B, RVU20C, RVU20D.
January 1, 2019
RVU19A
$1377.49changed to$1382.44
- Conversion factor 35.9996 changed to 36.0391
- Practice expense RVU 32.22 changed to 32.25
- Malpractice RVU 1.10 changed to 1.14
Held through RVU19B, RVU19C, RVU19D.
January 1, 2018
RVU18AR1
$1316.62changed to$1377.49
- Conversion factor 35.8887 changed to 35.9996
- Practice expense RVU 30.95 changed to 32.22
- Malpractice RVU 1.04 changed to 1.10
- Malpractice GPCI 1.429 changed to 1.631
Held through RVU18B, RVU18C, RVU18D.
January 1, 2017
RVU17A
$1249.02changed to$1316.62
- Conversion factor 35.8043 changed to 35.8887
- Practice expense RVU 29.47 changed to 30.95
- Malpractice RVU 0.95 changed to 1.04
- Malpractice GPCI 1.226 changed to 1.429
Held through RVU17B, RVU17C, RVU17D.
January 1, 2016
RVU16A
$1298.38changed to$1249.02
- Conversion factor 35.9335 changed to 35.8043
- Practice expense RVU 30.62 changed to 29.47
- Malpractice RVU 1.03 changed to 0.95
Held through RVU16B, RVU16C, RVU16D.
July 1, 2015
RVU15C
$1291.92changed to$1298.38
- Conversion factor 35.7547 changed to 35.9335
Held through RVU15D.
January 1, 2015
RVU15A
$1193.46changed to$1291.92
- Conversion factor 35.8228 changed to 35.7547
- Practice expense RVU 28.32 changed to 30.62
- Malpractice RVU 0.64 changed to 1.03
- Malpractice GPCI 1.165 changed to 1.226
Held through RVU15B.
January 1, 2014
RVU14A
$1203.02changed to$1193.46
- Conversion factor 34.0230 changed to 35.8228
- Practice expense RVU 30.37 changed to 28.32
- Malpractice RVU 0.67 changed to 0.64
- Malpractice GPCI 1.103 changed to 1.165
Held through RVU14B, RVU14C, RVU14D.
January 1, 2013
RVU13AR
Earliest loaded release: $1203.02
Held through RVU13B, RVU13C, RVU13D.
| Effective from | Office | Facility | CMS release |
|---|---|---|---|
| 2026-10-01 | $1,541.02 | $224.69 | RVU26D |
| 2026-07-01 | $1,541.02 | $224.69 | RVU26C |
| 2026-04-01 | $1,541.02 | $224.69 | RVU26B |
| 2026-01-01 | $1,541.02 | $224.69 | RVU26A |
| 2025-10-01 | $1,249.20 | $240.96 | RVU25D |
| 2025-07-01 | $1,249.20 | $240.96 | RVU25C |
| 2025-04-01 | $1,249.20 | $240.96 | RVU25B |
| 2025-01-01 | $1,249.20 | $240.96 | RVU25A |
| 2024-10-01 | $1,280.91 | $244.67 | RVU24D |
| 2024-07-01 | $1,280.91 | $244.67 | RVU24C |
| 2024-04-01 | $1,280.91 | $244.67 | RVU24B |
| 2024-03-09 | $1,280.91 | $244.67 | RVU24AR |
| 2024-01-01 | $1,260.00 | $240.67 | RVU24A |
| 2023-10-01 | $1,281.00 | $245.07 | RVU23D |
| 2023-07-01 | $1,281.00 | $245.07 | RVU23C |
| 2023-04-01 | $1,281.00 | $245.07 | RVU23B |
| 2023-01-01 | $1,281.00 | $245.07 | RVU23A |
| 2022-10-01 | $1,322.75 | $246.15 | RVU22D |
| 2022-07-01 | $1,322.75 | $246.15 | RVU22C |
| 2022-04-01 | $1,322.75 | $246.15 | RVU22B |
| 2022-01-01 | $1,322.75 | $246.15 | RVU22A |
| 2021-10-01 | $1,386.45 | $246.14 | RVU21D |
| 2021-07-01 | $1,386.45 | $246.14 | RVU21C |
| 2021-04-01 | $1,386.45 | $246.14 | RVU21B |
| 2021-01-01 | $1,386.45 | $246.14 | RVU21A |
| 2020-10-01 | $1,371.23 | $263.64 | RVU20D |
| 2020-07-01 | $1,371.23 | $263.64 | RVU20C |
| 2020-04-01 | $1,371.23 | $263.64 | RVU20B |
| 2020-01-01 | $1,371.23 | $263.64 | RVU20A |
| 2019-10-01 | $1,382.44 | $279.28 | RVU19D |
| 2019-07-01 | $1,382.44 | $279.28 | RVU19C |
| 2019-04-01 | $1,382.44 | $279.28 | RVU19B |
| 2019-01-01 | $1,382.44 | $279.28 | RVU19A |
| 2018-10-01 | $1,377.49 | $276.62 | RVU18D |
| 2018-07-01 | $1,377.49 | $276.62 | RVU18C |
| 2018-04-01 | $1,377.49 | $276.62 | RVU18B |
| 2018-01-01 | $1,377.49 | $276.62 | RVU18AR1 |
| 2017-10-01 | $1,316.62 | $264.36 | RVU17D |
| 2017-07-01 | $1,316.62 | $264.36 | RVU17C |
| 2017-04-01 | $1,316.62 | $264.36 | RVU17B |
| 2017-01-01 | $1,316.62 | $264.36 | RVU17A |
| 2016-10-01 | $1,249.02 | $250.80 | RVU16D |
| 2016-07-01 | $1,249.02 | $250.80 | RVU16C |
| 2016-04-01 | $1,249.02 | $250.80 | RVU16B |
| 2016-01-01 | $1,249.02 | $250.80 | RVU16A |
| 2015-10-01 | $1,298.38 | $255.95 | RVU15D |
| 2015-07-01 | $1,298.38 | $255.95 | RVU15C |
| 2015-04-01 | $1,291.92 | $254.67 | RVU15B |
| 2015-01-01 | $1,291.92 | $254.67 | RVU15A |
| 2014-10-01 | $1,193.46 | $235.20 | RVU14D |
| 2014-07-01 | $1,193.46 | $235.20 | RVU14C |
| 2014-04-01 | $1,193.46 | $235.20 | RVU14B |
| 2014-01-01 | $1,193.46 | $235.20 | RVU14A |
| 2013-10-01 | $1,203.02 | $225.54 | RVU13D |
| 2013-07-01 | $1,203.02 | $225.54 | RVU13C |
| 2013-04-01 | $1,203.02 | $225.54 | RVU13B |
| 2013-01-01 | $1,203.02 | $225.54 | RVU13AR |
Where the Montana rate applies
Montana is a Medicare payment area, not a city. Our Census mapping connects it to 497 cities and communities in Montana. Some span more than one payment area; confirm with the service ZIP.
- Absarokee
- Acton
- Alberton
- Alder
- Alzada
- Amsterdam
- Anaconda-Deer Lodge County
- Antelope
36228 billing questions
When is 36228 reported instead of 36224 or 36226?
Use 36224 or 36226 for the applicable internal carotid or vertebral artery angiography service. Add 36228 when the catheter is selectively advanced into an additional qualifying intracranial branch within that vascular family.
Can 36228 be billed by itself?
No. It is an add-on code and must be reported with the applicable primary procedure, commonly 36224 or 36226.
How many units of 36228 should be reported?
Report a unit for each qualifying additional second- or third-order intracranial branch selectively catheterized. The record should identify each branch and the angiography performed.
What supports reporting 36228?
Document the parent vascular family, the specific additional intracranial branch entered selectively, and the imaging performed. Imaging branches from a catheter that remains in the internal carotid or vertebral artery alone does not establish this additional selective catheterization.
How is bilateral 36228 handled?
For a bilateral procedure reported with modifier 50, CMS pays 150% of the single-procedure amount. The add-on must still be reported with its applicable primary procedure.
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
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