- What This Credential Actually Is
- The Two-Stage Structure: Written Then Oral
- Who Can Sit for It
- Reading the 26-Line Content Outline
- The Heaviest Published Ranges
- Fees, Cancellations and Rescoring
- Testing Logistics and Scheduling
- After You Pass: Validity and Maintenance
- Sequencing Your Preparation Around the Outline
- Frequently Asked Questions
- Primary certification is issued through the American Osteopathic Board of Surgery (AOBS); the credential on this page is General Vascular Surgery.
- The written exam is 200 multiple-choice questions in 4 hours 30 minutes, with a passing scaled score of 500 on a 200-800 scale.
- Full certification also requires an oral clinical-case exam; the base AOBS fees are $1,500 written plus $1,500 oral.
- The largest published content range is Aneurysm, Arterial Disease, Emboli, Non-ASVD, Thrombosis at 12-16%, followed by Cerebrovascular at 10-14%.
What This Credential Actually Is
Several credentials in medicine share the words "vascular surgery," so precision matters before you spend money or study hours. The credential covered here is the Primary Certification in Vascular Surgery offered through the American Osteopathic Board of Surgery (AOBS), with certification approved through the American Osteopathic Association (AOA). Current issuer pages label the selected primary credential General Vascular Surgery.
That distinction affects everything downstream: the exam content outline, the fee schedule, the eligibility pathway, the scheduling calendar and the maintenance obligations all come from AOBS and AOA pages. If you are comparing sources, make sure any fee table, date or passing-score claim you read is explicitly about AOBS General Vascular Surgery. For a plain-language orientation to the term itself, see our explainer What Is Vascular Surgery Certification?, and for the specialty as a discipline, What Is Vascular Surgery?
The Two-Stage Structure: Written Then Oral
Primary certification is not a single sitting. The usual route has two examinations, and each assesses something different.
Stage 1: The written examination
The written component is 200 multiple-choice questions delivered in 4 hours 30 minutes. The published materials do not specify how many of those items are scored versus unscored, so do not plan around an assumed split. The passing standard is a scaled score of 500 on a 200-800 scale. That is not a percent-correct threshold, and you cannot convert it into "I need to answer X questions correctly." Our breakdown in Vascular Surgery Passing Score 2026 goes deeper on how to think about a scaled cutoff.
Stage 2: The oral clinical-case examination
The oral stage assesses diagnostic interpretation, management and judgment through clinical cases. Its passing standard is criterion referenced. The reviewed oral page publishes no numeric cutoff, no total case count and no duration, so any source claiming a specific number of cases or minutes is going beyond what AOBS has posted. The oral requires program completion and board approval before you sit.
Who Can Sit for It
The specialty written-exam page describes the core training pathway as five years of AOA-approved General Surgery training plus two years of AOA-approved General Vascular Surgery training. Beyond training, the page lists:
- Success on the RPVI examination
- A submitted application and the required fees
- For applicants within 90 days of completing training, a program-director letter
- Document approval at least 14 days before testing
Common AOBS Board Policies add that applicants need an unrestricted active U.S. medical license and must comply with AOA ethical standards, and they also accept certain COCA graduates with AOA/ACGME training or LCME graduates with ACGME training. Those policies do not spell out a specific integrated-vascular alternative to the specialty page's training language, so if your training path is unconventional, confirm directly with the board rather than inferring. Ordinary board eligibility ends December 31 of the sixth year following training.
One caution: the linked AOBS Protocol for Certification handbook PDF returned an HTTP 404 on review, and the landing page for the protocol is marked "under revision" (dated January 6, 2023). Treat the live specialty pages and board-policy pages as your working sources, and verify requirements before you apply. A fuller walkthrough lives in Vascular Surgery Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Reading the 26-Line Content Outline
AOBS publishes the written-exam content as a list of headings with percentage ranges. Two points about reading it correctly:
- The ranges are published ranges, not fixed weights. Do not average them or assume your form will land at any midpoint.
- Several headings overlap in subject matter (for example, Dialysis appears both inside a combined heading and on its own line; Extra-Anatomic appears both inside a combined heading and separately; Pharmacology and Non-ASVD also recur). Overlapping headings remain separate lines, so a topic like dialysis access can plausibly be touched from more than one angle.
Also note the outline describes the written exam only. It is not an exhaustive blueprint of what the oral cases may probe. Here is the full published list:
| # | Domain heading | Published range |
|---|---|---|
| 1 | Amputation | 1-4% |
| 2 | Aneurysm, Arterial Disease, Emboli, Non-ASVD, Thrombosis | 12-16% |
| 3 | Aorta | 2-6% |
| 4 | Arterial | 1-3% |
| 5 | ASVD | 1-3% |
| 6 | Basic Science, Anatomy/Physiology, Extra-Anatomic | 8-12% |
| 7 | Carotid | 1-3% |
| 8 | Cerebrovascular | 10-14% |
| 9 | Complication | 1-3% |
| 10 | Critical Care | 1-5% |
| 11 | Diagnostics (incl. Doppler), Pharmacology, Dialysis | 1-5% |
| 12 | Dialysis | 1-4% |
| 13 | Endovascular | 6-10% |
| 14 | Extra-Anatomic | 1-3% |
| 15 | Graft | 1-5% |
| 16 | Hematology | 2-6% |
| 17 | Lower Extremity | 4-6% |
| 18 | Lymphatic | 1-4% |
| 19 | Non-ASVD | 1-5% |
| 20 | Pharmacology | 1-3% |
| 21 | Portal | 1-5% |
| 22 | Renal | 1-5% |
| 23 | Thoracic | 2-6% |
| 24 | Trauma | 6-10% |
| 25 | Venous | 4-8% |
| 26 | Visceral | 1-5% |
For a line-by-line treatment, see Vascular Surgery Exam Domains 2026: Complete Guide to All 26 Content Areas.
The Heaviest Published Ranges
Because the outline is range-based, the safest reading is relative: some headings clearly carry more potential volume than others. These are the ones with the largest published ceilings.
Aneurysm, Arterial Disease, Emboli, Non-ASVD, Thrombosis (12-16%)
The single largest published range. It bundles the bread-and-butter arterial pathology that defines the specialty, so expect questions that require you to distinguish between mechanisms of limb or organ ischemia and pick the right intervention.
- Aneurysmal disease: indications for repair, surveillance logic and complication recognition
- Embolic versus thrombotic acute ischemia and how that distinction drives management
- Non-atherosclerotic arterial disease as its own differential, separate from ASVD
Cerebrovascular (10-14%)
The second-largest range, and it sits alongside a separate Carotid line (1-3%). Treat the two as one connected body of knowledge on the exam, but know that the bulk of the published weight sits under the broader Cerebrovascular heading.
- Stroke and TIA evaluation as it relates to extracranial and intracranial disease
- Indications and timing considerations for revascularization
- Imaging and diagnostic interpretation relevant to cerebrovascular decision-making
Basic Science, Anatomy/Physiology, Extra-Anatomic (8-12%)
Easy to underweight because it feels "preclinical," but its published range rivals the major clinical headings. Anatomy and physiology knowledge also underpins the cases you will see in other domains.
- Vascular anatomy and relevant variants
- Hemodynamics and physiologic principles behind testing and intervention
- Extra-anatomic concepts, which also appear as their own separate 1-3% line
Endovascular (6-10%) and Trauma (6-10%)
Two mid-sized headings with identical published ranges and very different skill sets. Endovascular rewards device, access and complication familiarity; Trauma rewards rapid triage logic and injury-pattern recognition.
- Endovascular: indications, approaches, and recognizing procedural complications
- Trauma: vascular injury presentation, diagnostic approach and management priorities
Smaller but still meaningful: Venous (4-8%) and Lower Extremity (4-6%) carry real volume, while many other lines (Amputation, Carotid, Dialysis, Graft, Lymphatic, Portal, Renal, Visceral and others) have narrow ranges individually. Collectively those narrow lines add up, which is why skipping "minor" headings is a risky strategy. If you are wondering how demanding all this is in practice, read How Hard Is the Vascular Surgery Exam?
Fees, Cancellations and Rescoring
The base AOBS examination fees for the usual two-exam route are:
| Item | Amount |
|---|---|
| Written examination | $1,500 |
| Oral examination | $1,500 |
| Total base AOBS examination fees | $3,000 |
No member versus nonmember tier is published. Travel, review products and any applicable late charges are extra, so budget beyond the $3,000 figure. Our itemized view is in Vascular Surgery Certification Cost 2026: Complete Pricing Breakdown.
Cancellation, transfer and rescore rules
- Timely cancellation: the written and oral pages describe a $500 deduction for timely cancellation, with no refund after that point.
- Transfer: one board-approved transfer to the next administration is allowed for extenuating circumstances.
- Boundary wording: the oral page uses both "30 days or more" and "within 30 days" phrasing at the exact boundary, so if you are cancelling near the cutoff, get written clarification before relying on a date.
- Rescore/audit: a $200 rescore may be requested within one month of results. It does not give you access to individual items and does not reopen the passing cutoff.
If a first or second attempt does not succeed, retesting must occur within two years to keep your file active. After a third written and/or oral failure, the oral page requires documented board-review-course remediation.
Testing Logistics and Scheduling
The written exam is remotely proctored
Written testing uses MonitorEDU Secure Browser remote proctoring under AOBS/AOA. Requirements include a private room, a computer and a mobile device, a government photo ID that matches your name, and your AOA candidate ID. AOA recommends a personal computer with administrator access, and online lab values, a scratch pad and a calculator are supplied inside the platform. Open-book permission and adaptive delivery were not verified for the initial written examination, so do not assume either.
The AOA's PARADIGM platform offers generic platform practice, not a specialty-specific vascular practice exam. Use it to rehearse the interface, not to gauge content readiness. For content-focused rehearsal, our vascular surgery practice tests are built around the published outline headings.
The oral exam is in person
The oral page carries a dated notice (September 30, 2026) for in-person testing in New Orleans and states explicitly that there are no virtual oral examinations in 2026. The AOBS Rules of Conduct for the In-Person Oral Exam require government-issued photo ID, prohibit notes and books in examination and sequestered areas, and bar electronic devices in the examination room.
The calendar is not perfectly consistent
See Vascular Surgery Exam Dates 2026: Testing Windows, Deadlines & Scheduling for how to track deadlines and the 14-day document-approval requirement against a posted exam date.
After You Pass: Validity and Maintenance
The exact certification timeline describes active certification for one year after issue, conditional on OCC, rather than an unconditional ten-year term. In practice, that means maintenance starts immediately in spirit, even if the paperwork rhythm is annual and three-year.
| OCC component | What is required |
|---|---|
| Component 1: Licensure and ethics | Annual verification of an unrestricted license and ethics compliance |
| Component 2: CME | 60 credits per three-year cycle for time-limited diplomates and for non-time-limited diplomates voluntarily in OCC; 120 for non-time-limited diplomates outside OCC; no separate AOBS Category 1 or specialty-specific minimum listed |
| Component 3: Longitudinal assessment | Annual 15-question open-book assessment; 12/15 (80%) to pass; $225 registration fee in 2026 covering two attempts; delivered through the AOA LMS from 2026 |
| Component 4: QI/QA | At least one attestation every three years |
Newly certified physicians' mid-cycle CME requirements are prorated under AOA CME policies. The longitudinal assessment is separate from the initial exam and does not affect your initial scoring. Note also that annual participation begins in the certificate-expiration year and that certificates issued after 2018 omit printed expiration dates. Some component pages retain legacy wording (a ten-year-cycle reference in Component 4, an older proration table in Component 2), but those do not override the current timeline or the verified 2025-27 CME document.
For the career side, who hires and what it is worth, see Vascular Surgery Jobs, Vascular Surgery Salary Guide 2026 and Is the Vascular Surgery Certification Worth It? We deliberately do not quote income figures here, because none are published in the board materials.
Sequencing Your Preparation Around the Outline
Generic study advice is plentiful; what matters here is how to order the material. Use the published ranges to decide when to cover each cluster, and reserve a late block for oral-style case rehearsal.
Foundations and the biggest range
- Basic Science, Anatomy/Physiology, Extra-Anatomic first, since it underpins every later case
- Begin Aneurysm, Arterial Disease, Emboli, Non-ASVD, Thrombosis, the largest published range
Cerebrovascular and intervention
- Cerebrovascular with Carotid alongside it
- Endovascular, then Aorta and Thoracic as a connected group
Acute care and the mid-sized clinical areas
- Trauma, Critical Care and Complication together, since they share a recognition-under-pressure style
- Venous and Lower Extremity, plus Amputation
The long tail of narrow ranges
- Hematology, Pharmacology, Diagnostics (incl. Doppler), Dialysis, Graft
- Renal, Visceral, Portal, Lymphatic and the remaining small lines
Integration and oral readiness
- Mixed 200-question timed runs to rehearse the 4 hour 30 minute pacing
- Spoken case walk-throughs: diagnosis, workup, management and justification
Keep your question practice honest: tag each missed item to its outline heading and track which headings repeatedly cost you points. That mapping, not total hours studied, tells you where the next block should go. Our Vascular Surgery Study Guide 2026 expands on this approach, and the Vascular Surgery Cheat Sheet 2026 is a useful last-week scan. When you are ready to test yourself against outline-aligned questions, start with the main practice test site.
Key Takeaway
Plan for two exams, not one. Build your written prep around the 26 published headings, weighted by their ranges, and set aside separate time for in-person oral case rehearsal. Confirm dates, eligibility and fees against current AOBS pages before you commit.
Frequently Asked Questions
The American Osteopathic Board of Surgery (AOBS) administers it, with certification approved through the American Osteopathic Association. Current issuer pages name the credential General Vascular Surgery.
It consists of 200 multiple-choice questions in 4 hours 30 minutes. The scored versus unscored split is not specified. The passing standard is a scaled score of 500 on a 200-800 scale, not a percent-correct mark.
Base AOBS examination fees are $1,500 for the written exam and $1,500 for the oral exam, totaling $3,000 for the usual two-exam route. Travel, review products and any late charges are additional, and no member or nonmember tier is published.
No. The oral page carries a dated September 30, 2026 notice stating in-person testing in New Orleans and explicitly no virtual oral examinations in 2026. It assesses diagnostic interpretation, management and judgment using a criterion-referenced standard.
The exact timeline describes active certification for one year after issue, conditional on osteopathic continuous certification, rather than an unconditional ten-year term. Ongoing requirements include license and ethics verification, CME, an annual open-book longitudinal assessment and periodic QI/QA attestation.
For related background, you may also want to read Vascular Surgery Pass Rate 2026: What the Data Shows and Vascular Surgery Training.