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Our Board

CEO, Dr. Greg Winteregg

board greg winteregg private dental association clearwater floridaDr. Winteregg is a former practicing dentist and an internationally recognized lecturer, sales trainer, and management consultant. He has spent the last 25 years helping dental practice owners across the US and Canada achieve and sustain success.

After receiving his DDS from Indiana University School of Dentistry in 1981, Greg opened a private dental practice, which he operated for 12 years. Then, he became Vice President & Partner of MGE Management Experts, Inc., a practice-management training organization for the dental industry. Additionally, Dr. Winteregg is the founder and CEO of business consultancy, Matterhorn Business Development.

Witnessing an increasing need to communicate the benefits of private dental practices, among both dentists and patients, Greg started the Private Dentist Association.

Chief Legal Counsel, Frank Recker, DDS, JD

frank recker private dentist associationDr. Recker graduated Ohio State University’s School of Dentistry with a Doctorate of Dental Surgery in 1971. Afterward, he practiced dentistry in Cincinnati for 15 years and served as a member of the Ohio State Dental Board for six. He then obtained his Juris Doctor degree in 1981 entered the full-time practice of law.

Dr. Recker’s primary areas of practice are professional licensing matters before state regulatory agencies, malpractice defense, and other litigation involving health care professionals. He advises health care licensees and national professional associations in risk management, First Amendment matters, and licensing related issues. Dr. Recker lectures nationally on these topics and has represented hundreds of health care professionals throughout the United States in a multitude of legal matters.


Dr. Maryam Seifi

maryam seifi private dentist associationDr. Seifi received her Doctorate of Dental Surgery from the University of Maryland, Baltimore in 1990. She opened her own practice in 1991 and runs it successfully to this day. Dr. Seifi also served Dental School Board Member for the University of Maryland, was an Honorary Admission to the Prosthodontics and Cosmetic Clerkship, held the Presidency of the American Women Dental Association, and is a member of the American Academy of Cosmetic Dentistry.

In addition to Dentistry, Dr. Seifi also supports multiple humanitarian campaigns. These include Foundation For a Drug-Free World, Foster Kids Screening for Montgomery County, the Maryland Special Olympics, and the American Cancer Society.

With all of this, it comes as no surprise that she is dedicated to supporting pure and ethical Dentistry with the Private Dentist Association.

Dr. Bart Van Oostendorp

bart van oostendorp private dentist associationDr. Van Oostendorp attended Brigham Young University and went on to earn his Doctorate of Dental Surgery from the University of the Pacific/Dugoni School of Dentistry in 2002. Almost immediately, he started his own practice in Arizona in 2004. In 2010, he moved to North Carolina, starting another practice, and has been there ever since. Dr. Van Oostendorp is a member of the American Dental Association, North Carolina Dental Association, and the American Academy of Craniofacial Pain.

“I became involved with PDA because I want to protect our industry from money-hungry outside individuals and organizations, so my children, who become dentists, are not crippled by them. To preserve the respect that our industry has earned in society of being caring and intelligent. To keep the cost of dental care fair instead of allowing it to run out of control as it has in medicine where the providers and patients both lose.”

Dr. Shilpa Trivedi

shilpa trivedi private dentist association boardDr. Trivedi is President of the Preferred Dental Care group of practices and boasts 9 years of formal dental education. She earned both Bachelor and Master of Dental Surgery degrees in India before her Doctorate of Dental Surgery from the New York University.

At 29 years old, she purchased a six operatory office that she has now built up to being in the top 1% of dental offices in the USA. Her goal is to eradicate oral disease from society by providing patients with healthy teeth and gums for a lifetime. Dr. Trivedi believes that a 1 on 1 approach achieves the best results possible while allowing for compassionate assistance to any concerns related to oral health and dentistry. Dr. Trivedi is a member of The AGD, ADA and NYSDA and is active in various human rights organizations.

Advisory Board

Clinical Consultant, Dr. Gordon Christensen

Gordon Christensen, DDS MSD PhDDr. Christensen is the Founder and CEO of Practical Clinical Courses (PCC). Simultaneously, he is also Chief Executive Officer of Clinicians Report Foundation (CR), and a Practicing Prosthodontist in Utah. He is also a Diplomate of the American Board of Prosthodontics, Fellow and Diplomate in the International Congress of Oral Implantologists, Fellow in the Academy of Osseointegration, American College of Dentists, International College of Dentists, American College of Prosthodontists, Academy of General Dentistry (Hon), Royal College of Surgeons of England, and an Associate Fellow in the American Academy of Implant Dentistry.

Dr. Christensen’s experience and research has led him to see that help is drastically needed. So, he has joined the Private Dentist Association’s Advisory Board and is continuing his dedication to preserving the quality of Dentistry.

Social Media Consultant, Dr. Jessica Meier

jessica meier private dentist associationDr. Meier graduated Barnard College, Columbia University with a Bachelor’s in Neuroscience. Before enrolling in Dental School, she decided to spend time working for Physiology and Medicine Nobel Laureate, Dr. Richard Axel. During this time she pursued volunteer efforts at dental clinics in underserved communities in New York City, Nicaragua, and the Dominican Republic. She then went on to receive her dental degree from the University of Pennsylvania.

Dr. Meier brings a wealth of valuable experience to our team. She is a kind, caring individual and an experienced, excellent dentist. She prides herself on treating patients as if they were part of her family. Her ability to skillfully handle all dental concerns with a calm demeanor only amplifies the care she provides. She is an active member of the ADA, the Academy of General Dentistry, the Pennsylvania Dental Association, Delta Sigma Delta Dental Fraternity and the American Academy of Cosmetic Dentistry.

Director of Affiliate Relationships, Dr. Greg Hughes

greg hughes private dentist associationCEO of Viva Concepts since 2011, Dr. Hughes, brings more than 25 years of experience in dental marketing, consulting and business development to our board. He has lectured to more than 30,000 dentists and office staff on his four main factors that determine long term practice growth. Dr. Hughes graduated as a DDS from Loma Linda University in 1978 with the Oral Surgery award for excellence. He opened a private practice in Northern California which quickly expanded to 3 dental offices with 9 operatories.

Before Viva Concepts, Dr. Hughes also founded and directed one of the largest dental marketing consulting companies which, in 1988, was named one of Inc. Magazine’s Inc. 500 list of fastest growing companies in the US. During that time, he began lecturing to dentists and their staff to bring his experience to other practitioners.


Clinical Consultant, Kim Miller, RDH, BSDH

kim miller private dentist associationMrs. Miller is an international speaker, writer, workshop leader and Lead Profitability Coach with Inspired Hygiene. She is a member of the Advisory Board for Modern Hygiene Magazine and a four-time graduate of the Bale/Doneen Preceptorship. Kim has 37 years of clinical dental hygiene and 26 years of coaching and consulting experience. During her tenure, she has mentored hundreds of dental professionals.

Kim’s passion is helping clinicians incorporate the medical systemic aspect of periodontal infection and adopt solid, science-based clinical principles. All of this for the purpose of creating healthier patients and happier, more fulfilled clinicians.

Finance Consultant, Rushi Trivedi

rushi trivedi private dentist associationRushi Trivedi is the CEO of Preferred Dental Care group, a National Speaker and Consultant. He earned his degree in Civil Engineering with honors in India’s most prestigious school. Then, at an early age of 23, he taught engineering in college before earning his Masters in the U.S.

After his wife, Dr. Shilpa Trivedi, started Preferred Dental Care, Rushi decided to leave his successful career in Wall Street and help run the practice. Within months, the practice’s income doubled. By 2009, Preferred Dental Care opened a second office in Manhattan with 14 operatories, a lab on premises and all specialties under one roof. The practice group is now in the top 1% of dental practices in the country.


Marketing Consultant, Mike Gilroy

mike gilroy private dentist associationMr. Gilroy has worked with dental professionals for over 20 years, most recently as the CEO of Springstone Financial (now LendingClub Patient Solutions), which he co-founded in 2006. Prior to Springstone, Mike launched Dental Fee Plan (which later became Capital One Healthcare Finance). Before his entrepreneurial efforts in patient financing, Mike served as the Director of Sales and Marketing for the Caulk division of Dentsply, where he oversaw the launch of such brands as Aquasil, Prime&Bond, and Dyract. Mike has an MBA from the Kellogg School of Management at Northwestern University and a BS in Biology/Chemistry from the University of Notre Dame.

“I think the Private Dentist Association’s philosophy that dentists should continue being the decision makers on how best to deliver optimal dental care is good for the profession and for patients.”