- What the RVS Credential Actually Is
- Exam Format: 170 Questions, Four Item Types
- The Seven Content Domains and Their Weights
- Eligibility Pathways: RVS235, RVS4, RVS5 and RVS6
- Registration, Fees and the Testing Window
- Scoring, Pass Rate and Retakes
- Scheduling Your Prep Around the Weights
- Renewal and Keeping the Credential Active
- Where the Credential Is Used
- Frequently Asked Questions
- RVS here means Registered Vascular Specialist, a vascular ultrasound credential awarded by Cardiovascular Credentialing International (CCI).
- The exam is one registry-level test: 170 questions (150 scored), 170 minutes, delivered through Pearson VUE.
- A scaled score of 650 on CCI's 0-900 range is required to pass; it is not a percentage.
- Arterial (22%), extracranial/intracranial (20%) and venous (19%) domains together carry 61% of the score.
What the RVS Credential Actually Is
The Registered Vascular Specialist credential is a vascular ultrasound certification issued by Cardiovascular Credentialing International. It verifies that a sonographer can perform and interpret the technical side of vascular examinations safely and accurately. Because several unrelated credentials share the same three letters, it helps to be precise: this credential is not the ARDMS vascular technologist credential, not CCI's own RPhS phlebology credential, and not a vascular-interventional radiography certification from ARRT. It is a registry-level exam taken in a single sitting, with no separate physics exam followed by a specialty exam.
If you are still orienting yourself on terminology, our explainers on what RVS certification is and what RVS stands for cover the basics. This article goes a layer deeper into the mechanics: format, domains, eligibility, fees, scoring and renewal.
Exam Format: 170 Questions, Four Item Types
The examination contains 170 questions. Of these, 150 are scored and 20 are unidentified, randomly distributed unscored items. You cannot tell which are which, so every question deserves your full effort. You have 170 minutes (2 hours 50 minutes) to answer. The appointment itself runs three hours because it includes an extra 10 minutes for the tutorial and survey.
The Applicant Handbook and CCI's Question Types section describe four item formats:
- Single-best-answer multiple choice, where one option is the most correct.
- Multiple response, where you must select more than one correct option.
- Image hot spot, where you click the correct region of an image.
- Drag-and-place, where you move items into the correct positions.
One paragraph elsewhere on CCI's page describes only four-option multiple-choice questions. Do not rely on that and assume the test is MCQ-only; prepare for all four formats, especially image-based items, since vascular ultrasound is a visual discipline.
To gauge how this format feels in practice, our guide on how hard the RVS exam is breaks down where candidates tend to struggle.
The Seven Content Domains and Their Weights
The domains below come from the current live RVS Examination Matrix and Task List on CCI's website, reviewed October 14, 2026. The percentages are CCI's published approximate shares of the exam score. An older archived overview (published June 2022) lists slightly different allocations; ignore that document and study to the current matrix.
| Domain | Approximate Weight |
|---|---|
| 1. Maintaining Patient Care and Safety | 11% |
| 2. Applying Principles of Physics and Hemodynamics | 15% |
| 3. Performing Abdominal/Visceral Examinations | 10% |
| 4. Performing Extracranial/Intracranial Examinations | 20% |
| 5. Performing Arterial Examinations of the Upper and Lower Extremities | 22% |
| 6. Performing Venous Examinations of the Upper and Lower Extremities | 19% |
| 7. Performing Hemodialysis Examinations | 3% |
Domain 5: Arterial Examinations of the Upper and Lower Extremities (22%)
The single heaviest domain. Expect questions on protocol, waveform analysis and the hemodynamic meaning of what you see on screen.
- Normal versus abnormal waveform patterns and what changes them
- Technique for upper- and lower-extremity arterial studies, including image optimization
- Recognizing and describing stenosis and occlusion findings
Domain 4: Extracranial/Intracranial Examinations (20%)
Cerebrovascular duplex and related studies make up a fifth of the score, so treat this as a core domain rather than a niche.
- Carotid and vertebral anatomy, flow patterns and protocol steps
- Intracranial vessel assessment and interpretation fundamentals
- Pitfalls that produce misleading velocities or images
Domain 6: Venous Examinations of the Upper and Lower Extremities (19%)
Venous work is a staple of vascular labs, and the exam treats it accordingly.
- Compression, augmentation and Doppler assessment of venous patency
- Differentiating acute from chronic findings and recognizing reflux patterns
- Upper- versus lower-extremity protocol differences
Domain 2: Physics and Hemodynamics (15%)
This is the registry-level physics component folded into the single exam. It is also the domain that supports every other one, because artifacts and flow behavior explain what you see in the arterial, venous and cerebrovascular studies.
- Doppler principles, angle effects and scale/gain settings
- Pressure, flow and resistance relationships
- Artifacts and how to troubleshoot them
The remaining domains are smaller but not skippable. Patient care and safety (11%) covers the practical aspects of working with patients, abdominal/visceral examinations account for 10%, and hemodialysis examinations make up just 3%. For a fuller breakdown of each area, see our complete guide to the seven RVS exam domains.
Key Takeaway
Domains 4, 5 and 6 together account for roughly 61% of the score. Build your strongest knowledge there first, then use Domain 2 to explain it, since physics and hemodynamics underlie every waveform and artifact question.
Eligibility Pathways: RVS235, RVS4, RVS5 and RVS6
Every applicant needs a high school diploma or GED plus one qualifying pathway. You submit typed supporting documentation along with the applicable medical or program-director verification letters. The pathways differ by background:
| Pathway | Who It Fits | Core Requirement |
|---|---|---|
| RVS235 | Working sonographers with a health-science education | Health-science diploma, associate or baccalaureate qualification; one year of full-time-equivalent vascular ultrasound work; at least 600 vascular studies across work and formal clinical training |
| RVS4 | Graduates of programmatically accredited vascular ultrasound programs | Program graduation; approved pregraduation testing requires documentation, and credential release depends on graduating |
| RVS5 | Graduates of non-programmatically accredited vascular ultrasound programs | At least one year of vascular training and 800 clinical hours completed within the program |
| RVS6 | Sonographers holding another ultrasound credential | An active ultrasound credential, six months of full-time-equivalent vascular ultrasound work, and participation in at least 100 vascular studies |
The RVS1 pathway closed to first-time applicants on July 1, 2023, so it is no longer an option for new candidates. For a step-by-step look at documentation and qualification, read our RVS requirements guide.
Registration, Fees and the Testing Window
The examination fee is $365 USD, which includes a $100 nonrefundable application-processing portion. Testing is delivered at Pearson VUE test centers year-round, so there are no fixed national exam dates to chase. Once CCI approves your application, you receive an Authorization to Test that opens a 90-day testing window. Schedule early in that window so you have room to reschedule if something comes up.
For the complete money picture, including renewal costs, see our RVS certification cost breakdown, and for scheduling logistics see RVS exam dates and scheduling.
Scoring, Pass Rate and Retakes
The passing score is 650 on CCI's 0-900 scaled-score range. This is a scaled score, not a percentage of questions answered correctly, so you cannot convert it to a simple number of items to get right. Our article on the RVS passing score explains scaled scoring in more detail.
CCI reports a 56% first-time pass rate for the RVS in 2025. That means a substantial share of first-time candidates do not pass, which is a good reason to take preparation seriously rather than treating the exam as a formality. You can explore the context in our RVS pass rate analysis.
If you do not pass, a retake requires a new application, the examination fee again and a 45-day wait. Because each retake costs another $365 and over a month of delay, it is far more economical to be fully prepared the first time.
Scheduling Your Prep Around the Weights
A generic study calendar is less useful than one anchored to the exam's weighting. The sequence below front-loads the physics that explains everything else, then follows the score weights.
Physics and Hemodynamics (Domain 2)
- Doppler principles, angle correction, scale and gain
- Pressure, flow and resistance; common artifacts
Arterial and Venous Extremity Studies (Domains 5 and 6)
- Arterial waveform patterns, protocols and stenosis findings
- Venous compression, augmentation, reflux and acute versus chronic findings
Cerebrovascular Studies (Domain 4)
- Carotid, vertebral and intracranial protocols and flow patterns
Smaller Domains (Domains 1, 3 and 7)
- Patient care and safety, abdominal/visceral and hemodialysis examinations
Mixed Review and Timed Practice
- Full-length timed sets that include image hot spot and drag-and-place items
Adjust the pacing to your own experience. A sonographer who scans carotids daily may compress Week 6, while someone newer to venous work should extend Weeks 3-5. For a broader plan, see the RVS study guide, and keep a one-page reference handy with the RVS cheat sheet. When you are ready to test yourself against exam-style items, use the RVS practice tests.
Renewal and Keeping the Credential Active
Earning the credential is only the start. The initial credential period is 9-12 months. The first renewal costs $165 and requires a Code of Ethics attestation, with no CEUs due at that point.
After that, you renew every three years for $165. Each cycle requires the Code of Ethics attestation plus 36 CEUs, at least 30 of which must be cardiovascular-related. The remaining CEUs must be medical-related under CCI's dedicated CEU policy. One of CCI's pages suggests the remaining six CEUs can cover any topic, but the dedicated CEU requirements and FAQ specify a medical-related field, so plan on the stricter reading and do not count nonmedical coursework.
Where the Credential Is Used
Registered Vascular Specialists work where vascular ultrasound is performed: hospital vascular labs, outpatient vascular and imaging centers, and physician practices that run noninvasive vascular testing. Because the exam is built around arterial, venous, cerebrovascular, abdominal/visceral and dialysis-access studies, the credential signals competence across the core studies a vascular lab performs. Employer expectations vary, so check postings in your area; our overview of RVS jobs covers what employers tend to look for, and the RVS salary guide and ROI analysis help you weigh the investment.
Frequently Asked Questions
No. The Registered Vascular Specialist is awarded by Cardiovascular Credentialing International and is separate from the ARDMS vascular technologist credential. They have different applicants' pathways, exams and renewal rules.
There are 170 questions, of which 150 are scored and 20 are unscored items you cannot identify. You have 170 minutes to answer, within a three-hour appointment that also covers a 10-minute tutorial and survey.
A scaled score of 650 on CCI's 0-900 range. It is not a percentage, so you cannot translate it into a fixed number of correct answers.
Arterial examinations of the upper and lower extremities lead at 22%, followed by extracranial/intracranial examinations at 20% and venous examinations at 19%. Together they make up about 61% of the score.
You must submit a new application, pay the examination fee again and wait 45 days before retesting. CCI reported a 56% first-time pass rate in 2025, so thorough preparation is worthwhile.