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American Registry for Diagnostic Medical Sonography
(ARDMS) • Founded 1975
ARDMS is the recognized leader in diagnostic medical sonography certification. ARDMS administers examinations and awards credentials in the areas of diagnostic medical sonography, vascular technology, and cardiovascular technology.
Contact
Address
1401 Rockville Pike, Suite 600Rockville, MD 20852
USA
Credentials Offered
All-Access Subscription
Every ARDMS Credential. One Subscription.
Get unlimited access to all ARDMS exam prep materials. Study for RDMS, RDCS, or RVT—all included in your subscription.
About ARDMS Certification
The American Registry for Diagnostic Medical Sonography (ARDMS®) is the leading certifying organization for sonographers. All ARDMS credentials require passing the SPI exam plus at least one specialty exam. Prepry covers everything you need.
ARDMS Contact Info & ResourcesRegistered Diagnostic Medical Sonographer
For sonographers performing general diagnostic ultrasound
Specialty Exams:
Registered Diagnostic Cardiac Sonographer
For sonographers performing cardiac ultrasound
Specialty Exams:
Registered Vascular Technologist
For technologists performing vascular ultrasound
Specialty Exams:
SPI is Required for All ARDMS Credentials
Every ARDMS credential (RDMS, RDCS, RVT) requires passing the Sonography Principles & Instrumentation (SPI) exam. Prepry includes 1,150+ SPI questions with video lessons to help you master ultrasound physics.
Learn more about SPI prepARDMS Certification Exams
Explore our comprehensive exam prep for each ARDMS specialty examination
SPI (Sonography Principles) Exam Prep
Master ultrasound physics, instrumentation, and Doppler principles.
Abdomen Exam Prep
Liver, gallbladder, kidney, spleen, pancreas, and abdominal pathology.
OB/GYN Exam Prep
Obstetrics, gynecology, fetal anatomy, and first trimester imaging.
Vascular (RVT) Exam Prep
Cerebrovascular, peripheral arterial, venous, and abdominal vascular.
Adult Echo Exam Prep
Cardiac anatomy, hemodynamics, and echocardiography protocols.
Breast Exam Prep
Breast anatomy, pathology, and imaging protocols.
Pediatric Sonography Exam Prep
Neonatal head, pediatric abdomen, and hip imaging.
Fetal Echo Exam Prep
Fetal cardiac anatomy and congenital heart defects.
All ARDMS exams included with your subscription. No additional fees.
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Why Students Pass with Prepry
Pass Guarantee
Score 80% or higher on mock exams and move 80% of questions to the Learned column, but don't pass? Get 3 extra months of Prepry Pro, free.
5,925+ Practice Questions
Comprehensive question banks for SPI and every ARDMS specialty exam. Questions are regularly updated to match the latest exam formats.
Video Lessons
Bite-sized video explanations for complex topics like physics, Doppler principles, and anatomy for SPI, Abdomen, OB/GYN, and Vascular.
Realistic Mock Exams
Full-length practice exams that simulate the real ARDMS testing experience. Timed just like the real thing.
Track Your Progress
See exactly where you stand across all exams. Identify weak spots and focus your study time where it matters most.
Web, iPhone & Android
Study anywhere—on the web, iPhone, or Android. Perfect for studying during clinical rotations or on your commute.
Success Stories
Join Thousands Who Earned Their ARDMS Credentials
“I passed both my SPI and Abdomen exams on the first try with Prepry! The question explanations really helped me understand the material, not just memorize it.”
Jessica T.
RDMS (AB), Class of 2024
“The all-access subscription is incredible value. I studied for my RVT while also preparing for my SPI. Having everything in one place made studying so much easier.”
David K.
RVT, Vascular Technologist
“After struggling with physics concepts, the SPI video lessons finally made everything click. I went from failing practice tests to passing the real exam with flying colors.”
Amanda R.
RDMS, Repeat Test Taker
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Everything included:
- Pass Guarantee -- score 80%+ on mocks and learn 80% of questions, but don't pass? 3 months free
- All specialty exams included
- Full practice question bank with detailed explanations
- Video lessons for complex topics
- Study reminders & exam countdown
- Available on Web, iPhone & Android
- Priority email support
Common Questions
Frequently Asked Questions
Prepry covers all three ARDMS credentials: RDMS (Registered Diagnostic Medical Sonographer), RDCS (Registered Diagnostic Cardiac Sonographer), and RVT (Registered Vascular Technologist). All specialty exams are included in your subscription.
Yes! The Sonography Principles & Instrumentation (SPI) exam is required for all ARDMS credentials. You must pass SPI plus at least one specialty exam to earn your credential. Prepry includes 1,150+ SPI questions with video lessons.
Score 80% or higher on your mock exams and move 80% of questions to the Learned column, but don't pass? We'll give you 3 extra months of Prepry Pro, free.
Yes! Our questions are written to match ARDMS exam specifications and difficulty levels. Many students tell us the mock exams felt very similar to the actual registry exams.
Absolutely. Prepry is available on the web, iPhone (App Store), and Android (Google Play). Study whenever and wherever works for you.
Yes. You can cancel your monthly subscription at any time. We also offer a pass guarantee -- score 80% or higher on mock exams and move 80% of questions to the Learned column, but don't pass? Get 3 extra months of Prepry Pro, free.
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