$1,159.51–$1,234.01
36222 covers selective catheterization of the common carotid or innominate artery and angiography of the associated carotid circulation. Choose 36227 for the separately performed external carotid selective study.
On this page
CMS RVU26D · Effective 2026-10-01
36227 External carotid angiography Medicare reimbursement rates in Maine
Reports selective catheter placement in an external carotid artery with angiography of its circulation, including intracranial imaging when performed. Compare 36227 office and facility rates across CMS payment localities in Maine.
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 36227 in Maine?
Maine has 2 payment localities in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the 2 payment areas shown below, using the same CMS release.
Office / nonfacility
$250.65–$263.89
2 of 2 localities have a supported rate.
Facility setting
$98.54–$100.04
2 of 2 localities have a 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.
Cerebrovascular angiography
About 36227: External carotid catheterization with angiography
Reports selective catheter placement in an external carotid artery with angiography of its circulation, including intracranial imaging when performed.
A physician, commonly an interventional radiologist or neurointerventional specialist, advances a catheter selectively into an external carotid artery and performs angiography of that artery’s circulation. The study may help evaluate head and neck vascular findings, such as a suspected vascular lesion or bleeding source, and may be performed during a diagnostic or interventional angiography session. Intracranial imaging is included when performed as part of this external carotid study.
Report 36227 as an add-on with an appropriate primary cervicocerebral angiography procedure, not by itself. Documentation should identify the catheterized external carotid artery, the angiographic work performed, and the clinical findings supporting the study. CMS treats payment for this add-on as within the primary procedure’s global period. For a bilateral procedure reported with modifier 50, CMS pays 150% under the supplied fee schedule rule.
CMS billing rules for 36227
- Global period
- Add-on code: billed only together with a primary procedure and paid within that procedure's global period.
- Bilateral procedures
- Bilateral procedure with modifier 50 is paid at 150%.
Where the value comes from
- Work RVU2.04 · 25%
- Practice expense (office) RVU5.50 · 67%
- Malpractice RVU0.65 · 8%
13.7K
Medicare services in 2024 · #1306 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.
36227 compared with similar codes
Office rates for Maine, from the same CMS release.
$2,159.15–$2,307.53
36224 is for selective internal carotid catheterization and angiography; 36227 is for the external carotid circulation.
$1,414.66–$1,511.30
36228 concerns selective catheter placement in an intracranial artery branch. 36227 addresses the external carotid artery and its circulation.
$2,100.24–$2,244.13
36226 describes selective vertebral artery catheterization and angiography, not external carotid catheterization.
Compare 36227 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.
2 of 2 payment localities
Rest Of Maine →
Office / nonfacility
$250.65
Facility
$98.54
Southern Maine →
Office / nonfacility
$263.89
Facility
$100.04
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36227 billing questions
Can 36227 be reported by itself?
No. It is an add-on code and must be reported with an eligible primary cervicocerebral angiography procedure.
How is 36227 different from 36224?
36227 describes selective catheter placement and angiography of the external carotid circulation. 36224 concerns selective placement in the internal carotid artery and angiography of its circulation.
Does 36227 include the angiographic imaging?
Yes. Angiography of the external carotid circulation is part of the service, including intracranial imaging when performed.
How should bilateral external carotid studies be reported?
For a bilateral procedure, use modifier 50 as applicable. CMS pays 150% for the bilateral procedure under the supplied rule.
What documentation supports reporting 36227?
Document the external carotid artery selectively catheterized, the angiography performed, and the clinical reason and findings for the study.
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.
4,45036224,,Place cath carotd art,A,,6.09,62.32,,1.89,,1.96,70.37,9.94,0,000,0.00,0.00,0.00,2,1,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
4,45136225,,Place cath subclavian art,A,,5.61,46.36,,1.51,,1.69,53.66,8.81,0,000,0.00,0.00,0.00,2,1,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
4,45236226,,Place cath vertebral art,A,,6.09,60.43,,1.85,,1.92,68.44,9.86,0,000,0.00,0.00,0.00,2,1,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
4,45336227,,Place cath xtrnl carotid,A,,2.04,5.50,,0.55,,0.65,8.19,3.24,0,ZZZ,0.00,0.00,0.00,0,1,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
4,45436228,,Place cath intracranial art,A,,4.14,40.57,,1.16,,1.43,46.14,6.73,0,ZZZ,0.00,0.00,0.00,0,1,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
4,45536245,,Ins cath abd/l-ext art 1st,A,,4.53,30.50,,0.81,,0.86,35.89,6.20,0,XXX,0.00,0.00,0.00,2,1,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00
4,45636246,,Ins cath abd/l-ext art 2nd,A,,4.89,17.95,,0.69,,1.05,23.89,6.63,0,000,0.00,0.00,0.00,2,1,1,0,0,9,,33.4009,09,0,99,0.00,0.00,0.00