CPT code 33866: Aortic graft, hemiarch extension2026 Medicare rate & RVUs in Utah
Reports graft reconstruction of the aortic hemiarch added to an eligible ascending aortic replacement during open repair of complex aortic disease.
In Utah, Medicare pays $815.19 for 33866 in a facility. There’s no office rate.
Check a contract rate as a % of Medicare · 33866 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 33866 covers
This add-on describes reconstruction of the proximal aortic arch’s hemiarch segment as part of an open aortic operation. The cardiac surgeon replaces the diseased portion with graft material, often while treating aneurysmal or other complex disease that also requires ascending aortic replacement. These procedures are typically performed in a hospital operating room with cardiopulmonary bypass; the operative report should identify the hemiarch work and the extent of aortic replacement performed.
Report 33866 with an eligible primary ascending aortic replacement, such as 33858, 33859, 33863, or 33864; it is not a stand-alone service. Documentation should distinguish hemiarch reconstruction from replacement limited to the ascending aorta and describe the grafted segment. CMS treats this as an add-on code billed with the primary procedure, with payment within that procedure’s global period.
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 Utah compares for 33866
Across 109 of 109 payment localities, the facility rate for 33866 runs from $733.13 in Wisconsin to $1,069.27 in Alaska. Utah pays $815.19. The RVUs are the same everywhere; the geographic indexes change the dollars.
- Utah · this page$815.19
- Los Angeles, CA · California$833.69+$18.50
- Washington, DC area · District of Columbia$904.66+$89.47
- Miami, FL · Florida$1,059.51+$244.32
- Chicago, IL · Illinois$1,026.01+$210.82
- Manhattan, NY · New York$976.05+$160.86
- Alaska · Alaska$1,069.27+$254.08
Other areas in Utah first, then benchmark localities. Bars start at $0.
Every other payment area
| Payment locality | Office | Facility |
|---|---|---|
| AlabamaAlabama | — | $760.31 |
| ArkansasArkansas | — | $751.18 |
| ArizonaArizona | — | $812.56 |
| Bakersfield, CACalifornia | — | $803.04 |
| Chico, CACalifornia | — | $791.47 |
| El Centro, CACalifornia | — | $792.18 |
| Fresno, CACalifornia | — | $791.47 |
| Hanford, CACalifornia | — | $791.47 |
| Madera, CACalifornia | — | $791.47 |
| Merced, CACalifornia | — | $791.47 |
| Modesto, CACalifornia | — | $791.47 |
| Napa, CACalifornia | — | $839.80 |
| Oxnard, CACalifornia | — | $820.21 |
| Redding, CACalifornia | — | $791.47 |
| Rest of CaliforniaCalifornia | — | $791.47 |
| Riverside, CACalifornia | — | $837.26 |
| Sacramento, CACalifornia | — | $810.22 |
| Salinas, CACalifornia | — | $806.87 |
| San Diego, CACalifornia | — | $811.43 |
| Marin County, CACalifornia | — | $861.98 |
| San Francisco, CACalifornia | — | $857.13 |
| San Benito County, CACalifornia | — | $885.34 |
| Santa Clara County, CACalifornia | — | $865.52 |
| San Luis Obispo, CACalifornia | — | $796.46 |
| Santa Cruz, CACalifornia | — | $807.58 |
| Santa Maria, CACalifornia | — | $805.94 |
| Santa Rosa, CACalifornia | — | $814.29 |
| Stockton, CACalifornia | — | $791.47 |
| Vallejo, CACalifornia | — | $832.82 |
| Visalia, CACalifornia | — | $791.47 |
| Yuba City, CACalifornia | — | $791.47 |
| ColoradoColorado | — | $819.81 |
| ConnecticutConnecticut | — | $887.13 |
| DelawareDelaware | — | $823.79 |
| Fort Lauderdale, FLFlorida | — | $953.44 |
| Rest of FloridaFlorida | — | $903.33 |
| Atlanta, GAGeorgia | — | $868.95 |
| Rest of GeorgiaGeorgia | — | $851.56 |
| Hawaii, Guam, HIHawaii | — | $792.53 |
| IowaIowa | — | $740.84 |
| IdahoIdaho | — | $752.26 |
| East St. Louis, ILIllinois | — | $972.04 |
| Rest of IllinoisIllinois | — | $906.91 |
| Suburban Chicago, ILIllinois | — | $953.97 |
| IndianaIndiana | — | $754.92 |
| KansasKansas | — | $754.83 |
| KentuckyKentucky | — | $811.70 |
| New Orleans, LALouisiana | — | $849.25 |
| Rest of LouisianaLouisiana | — | $817.37 |
| Metropolitan Boston, MAMassachusetts | — | $867.19 |
| Rest of MassachusettsMassachusetts | — | $823.13 |
| Baltimore area, MDMaryland | — | $888.21 |
| Rest of MarylandMaryland | — | $832.17 |
| Rest of MaineMaine | — | $773.51 |
| Southern Maine, MEMaine | — | $783.02 |
| Detroit, MIMichigan | — | $930.47 |
| Rest of MichiganMichigan | — | $845.01 |
| MinnesotaMinnesota | — | $739.65 |
| Metropolitan Kansas City, MOMissouri | — | $826.34 |
| Metropolitan St. Louis, MOMissouri | — | $831.41 |
| Rest of MissouriMissouri | — | $816.99 |
| MississippiMississippi | — | $783.36 |
| MontanaMontana | — | $836.41 |
| North CarolinaNorth Carolina | — | $777.44 |
| North DakotaNorth Dakota | — | $751.98 |
| NebraskaNebraska | — | $739.06 |
| New HampshireNew Hampshire | — | $823.62 |
| Northern New JerseyNew Jersey | — | $901.36 |
| Rest of New JerseyNew Jersey | — | $884.32 |
| New MexicoNew Mexico | — | $855.74 |
| NevadaNevada | — | $812.99 |
| NYC suburbs and Long Island, NYNew York | — | $1,017.83 |
| Poughkeepsie and northern NYC suburbs, NYNew York | — | $903.67 |
| Queens, NYNew York | — | $957.83 |
| Rest of New YorkNew York | — | $788.54 |
| OhioOhio | — | $827.75 |
| OklahomaOklahoma | — | $792.49 |
| Portland, OROregon | — | $822.30 |
| Rest of OregonOregon | — | $793.87 |
| Metropolitan Philadelphia, PAPennsylvania | — | $879.38 |
| Rest of PennsylvaniaPennsylvania | — | $819.34 |
| Puerto RicoPuerto Rico | — | $835.83 |
| Rhode IslandRhode Island | — | $836.10 |
| South CarolinaSouth Carolina | — | $806.49 |
| South DakotaSouth Dakota | — | $741.99 |
| TennesseeTennessee | — | $760.11 |
| Austin, TXTexas | — | $828.31 |
| Beaumont, TXTexas | — | $816.14 |
| Brazoria, TXTexas | — | $808.90 |
| Dallas, TXTexas | — | $821.18 |
| Fort Worth, TXTexas | — | $821.88 |
| Galveston, TXTexas | — | $815.98 |
| Houston, TXTexas | — | $894.13 |
| Rest of TexasTexas | — | $816.95 |
| VirginiaVirginia | — | $792.79 |
| Virgin Islands, VIUnited States Virgin Islands | — | $835.83 |
| VermontVermont | — | $765.08 |
| Rest of WashingtonWashington | — | $816.26 |
| King County, WAWashington | — | $865.81 |
| WisconsinWisconsin | — | $733.13 |
| West VirginiaWest Virginia | — | $882.98 |
| WyomingWyoming | — | $799.61 |
33866 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.
View every state and territory as a table
| State / territory | Office rate range | Localities |
|---|---|---|
| AK | No published base rate | 1 |
| AL | No published base rate | 1 |
| AR | No published base rate | 1 |
| AZ | No published base rate | 1 |
| CA | No published base rate | 29 |
| CO | No published base rate | 1 |
| CT | No published base rate | 1 |
| DC | No published base rate | 1 |
| DE | No published base rate | 1 |
| FL | No published base rate | 3 |
| GA | No published base rate | 2 |
| GU | No published base rate | 1 |
| HI | No published base rate | 1 |
| IA | No published base rate | 1 |
| ID | No published base rate | 1 |
| IL | No published base rate | 4 |
| IN | No published base rate | 1 |
| KS | No published base rate | 1 |
| KY | No published base rate | 1 |
| LA | No published base rate | 2 |
| MA | No published base rate | 2 |
| MD | No published base rate | 3 |
| ME | No published base rate | 2 |
| MI | No published base rate | 2 |
| MN | No published base rate | 1 |
| MO | No published base rate | 3 |
| MS | No published base rate | 1 |
| MT | No published base rate | 1 |
| NC | No published base rate | 1 |
| ND | No published base rate | 1 |
| NE | No published base rate | 1 |
| NH | No published base rate | 1 |
| NJ | No published base rate | 2 |
| NM | No published base rate | 1 |
| NV | No published base rate | 1 |
| NY | No published base rate | 5 |
| OH | No published base rate | 1 |
| OK | No published base rate | 1 |
| OR | No published base rate | 2 |
| PA | No published base rate | 2 |
| PR | No published base rate | 1 |
| RI | No published base rate | 1 |
| SC | No published base rate | 1 |
| SD | No published base rate | 1 |
| TN | No published base rate | 1 |
| TX | No published base rate | 8 |
| UT | No published base rate | 1 |
| VA | No published base rate | 2 |
| VI | No published base rate | 1 |
| VT | No published base rate | 1 |
| WA | No published base rate | 2 |
| WI | No published base rate | 1 |
| WV | No published base rate | 1 |
| WY | No published base rate | 1 |
How the 33866 rate is calculated
Each of 33866’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 · 33866
RVUs × geographic indexes × conversion factor
Work17.31
17.31 RVUs× 1.000 GPCI
Practice expense3.47
3.47 RVUs× 1.000 GPCI
Malpractice4.27
4.27 RVUs× 1.000 GPCI
Adjusted RVUs
25.0500
Conversion factor
$33.4009
Medicare rate
$836.69
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
The exact Utah inputs and CMS source lines
PPRRVU2026_Oct_nonQPP.csv
4,094
- Code
- 33866
- Physician work
- 17.31
- Practice expense
- 3.47
- Malpractice
- 4.27
GPCI2026.csv
104
- Locality
- Utah
- Physician work
- 1.000
- Practice expense
- 0.940
- Malpractice
- 0.898
| Component | RVU | Locality factor | Adjusted |
|---|---|---|---|
| Physician work | 17.31 | × 1.000 | 17.3100 |
| Practice expense | 3.47 | × 0.940 | 3.2618 |
| Malpractice | 4.27 | × 0.898 | 3.8345 |
| Total RVUs | 24.4063 | ||
| Conversion factor | × 33.4009 | ||
Facility rate, Utah$815.19
Facility: (17.31 × 1 + 3.47 × 0.94 + 4.27 × 0.898) × $33.4009 = $815.19
Payment rules and modifiers for 33866
The CMS indicators that decide how 33866 is paid alongside other services.
CMS payment indicators · 33866
Aortic graft, hemiarch extension
| 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) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 0 | Not paid without supporting documentation. |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 1 | Permitted with supporting documentation. |
| Professional/technical | 0 | Physician service: no professional/technical split. |
How 33866 has changed in Utah
33866 · Office / nonfacility
Rate unavailable
Effective 2026-10-01
A rate is unavailable in one of these releases, so a change cannot be calculated.
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, 2019
RVU19A
No ratechanged toNo rate
Held through RVU19B, RVU19C, RVU19D, RVU20A, RVU20B, RVU20C, RVU20D, RVU21A, RVU21B, RVU21C, RVU21D, RVU22A, RVU22B, RVU22C, RVU22D, RVU23A, RVU23B, RVU23C, RVU23D, RVU24A, RVU24AR, RVU24B, RVU24C, RVU24D, RVU25A, RVU25B, RVU25C, RVU25D, RVU26A, RVU26B, RVU26C, RVU26D.
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, RVU17A, RVU17B, RVU17C, RVU17D, RVU18AR1, RVU18B, RVU18C, RVU18D.
| Effective from | Office | Facility | CMS release |
|---|---|---|---|
| 2026-10-01 | Not available in this setting | $815.19 | RVU26D |
| 2026-07-01 | Not available in this setting | $815.19 | RVU26C |
| 2026-04-01 | Not available in this setting | $815.19 | RVU26B |
| 2026-01-01 | Not available in this setting | $815.19 | RVU26A |
| 2025-10-01 | Not available in this setting | $852.29 | RVU25D |
| 2025-07-01 | Not available in this setting | $852.29 | RVU25C |
| 2025-04-01 | Not available in this setting | $852.29 | RVU25B |
| 2025-01-01 | Not available in this setting | $852.29 | RVU25A |
| 2024-10-01 | Not available in this setting | $873.98 | RVU24D |
| 2024-07-01 | Not available in this setting | $873.98 | RVU24C |
| 2024-04-01 | Not available in this setting | $873.98 | RVU24B |
| 2024-03-09 | Not available in this setting | $873.98 | RVU24AR |
| 2024-01-01 | Not available in this setting | $859.72 | RVU24A |
| 2023-10-01 | Not available in this setting | $880.04 | RVU23D |
| 2023-07-01 | Not available in this setting | $880.04 | RVU23C |
| 2023-04-01 | Not available in this setting | $880.04 | RVU23B |
| 2023-01-01 | Not available in this setting | $880.04 | RVU23A |
| 2022-10-01 | Not available in this setting | $890.72 | RVU22D |
| 2022-07-01 | Not available in this setting | $890.72 | RVU22C |
| 2022-04-01 | Not available in this setting | $890.72 | RVU22B |
| 2022-01-01 | Not available in this setting | $890.72 | RVU22A |
| 2021-10-01 | Not available in this setting | $897.13 | RVU21D |
| 2021-07-01 | Not available in this setting | $897.13 | RVU21C |
| 2021-04-01 | Not available in this setting | $897.13 | RVU21B |
| 2021-01-01 | Not available in this setting | $897.13 | RVU21A |
| 2020-10-01 | Not available in this setting | $950.11 | RVU20D |
| 2020-07-01 | Not available in this setting | $950.11 | RVU20C |
| 2020-04-01 | Not available in this setting | $950.11 | RVU20B |
| 2020-01-01 | Not available in this setting | $950.11 | RVU20A |
| 2019-10-01 | Not available in this setting | $1,083.99 | RVU19D |
| 2019-07-01 | Not available in this setting | $1,083.99 | RVU19C |
| 2019-04-01 | Not available in this setting | $1,083.99 | RVU19B |
| 2019-01-01 | Not available in this setting | $1,083.99 | RVU19A |
| 2018-10-01 | Not in this release | Not in this release | RVU18D |
| 2018-07-01 | Not in this release | Not in this release | RVU18C |
| 2018-04-01 | Not in this release | Not in this release | RVU18B |
| 2018-01-01 | Not in this release | Not in this release | RVU18AR1 |
| 2017-10-01 | Not in this release | Not in this release | RVU17D |
| 2017-07-01 | Not in this release | Not in this release | RVU17C |
| 2017-04-01 | Not in this release | Not in this release | RVU17B |
| 2017-01-01 | Not in this release | Not in this release | RVU17A |
| 2016-10-01 | Not in this release | Not in this release | RVU16D |
| 2016-07-01 | Not in this release | Not in this release | RVU16C |
| 2016-04-01 | Not in this release | Not in this release | RVU16B |
| 2016-01-01 | Not in this release | Not in this release | RVU16A |
| 2015-10-01 | Not in this release | Not in this release | RVU15D |
| 2015-07-01 | Not in this release | Not in this release | RVU15C |
| 2015-04-01 | Not in this release | Not in this release | RVU15B |
| 2015-01-01 | Not in this release | Not in this release | RVU15A |
| 2014-10-01 | Not in this release | Not in this release | RVU14D |
| 2014-07-01 | Not in this release | Not in this release | RVU14C |
| 2014-04-01 | Not in this release | Not in this release | RVU14B |
| 2014-01-01 | Not in this release | Not in this release | RVU14A |
| 2013-10-01 | Not in this release | Not in this release | RVU13D |
| 2013-07-01 | Not in this release | Not in this release | RVU13C |
| 2013-04-01 | Not in this release | Not in this release | RVU13B |
| 2013-01-01 | Not in this release | Not in this release | RVU13AR |
Where the Utah rate applies
Utah is a Medicare payment area, not a city. Our Census mapping connects it to 334 cities and communities in Utah. Some span more than one payment area; confirm with the service ZIP.
- Alpine
- Alta
- Altamont
- Alton
- Amalga
- American Fork
- Aneth
- Annabella
33866 billing questions
Which primary codes can be paired with 33866?
It is reported as an add-on with eligible ascending aortic replacement procedures, including 33858, 33859, 33863, and 33864. The operative report must support that hemiarch reconstruction was performed.
Can 33866 be reported by itself?
No. CMS identifies it as an add-on code, so it must be billed with a primary procedure and is paid within that procedure’s global period.
How is hemiarch reconstruction distinguished from an ascending aortic graft?
The documentation should show that the graft reconstruction extended into the hemiarch, rather than being limited to the ascending aorta. The primary code identifies the associated ascending aortic operation.
When is a broader arch replacement code more appropriate?
When the operative work replaces the transverse aortic arch rather than a hemiarch segment, compare the documented extent with code 33871. The code selection should follow the actual arch reconstruction performed.
What should the operative report document?
It should describe the diseased aortic segments treated, the hemiarch graft reconstruction, and the associated primary ascending aortic replacement. This supports reporting the add-on with the operation that required it.
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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