About Our Doctors

At the core of our dental practice is a friendly team of professionals that are dedicated to your utmost comfort and optimal oral health. We view each patient as a unique individual, and tailor each treatment to your specific needs. As part of our commitment to providing close, personalized attention to every patient, we want to encourage patient communication. Please know that we are here to provide outstanding patient care, and that we value the trust you have placed in us.

As your dental health professionals, we want you to be confident knowing that we are a team of highly trained and skilled clinicians. We pride ourselves in providing the care you need to keep your smile healthy.

To give you the best possible service and results, we are committed to continual education and learning. We attend dental lectures, meetings, and dental conventions to stay informed of new techniques, the latest products, and the newest equipment that a modern dental office can utilize to provide state-of-the-art dental care. Also, being members of various professional dental associations helps us to stay abreast of the changes and recommendations for our profession.

Dr. Stuart D. Waite, DDS, MBA

Specialty: Dental Medicine
Subspecialty: General

Dr. Waite


  • Undergraduate Graceland University Lamoni, IA
  • Medical (D.D.S.) University of Minnesota School of Dentistry
  • Residency University of Alabama School of Dentistry
  • M.B.A. Washington University Olin School of Business St. Louis, MO

I transplanted from Minnesota to St. Louis in 1989. I came to organize a training program for dentists at Mercy Hospital and never left. I enjoy being part of a team that takes pleasure in serving others. I enjoy meeting people and having the opportunity to improve their total health by education and clinical care. Building relationships with people who value others and want to make a difference in the world gives me joy and satisfaction.

Dr. Scott A. McClain, DDS

Specialty: Dental Medicine
Subspecialty: General

Dr. McClain


  • Undergraduate Graceland University Lamoni, IA
  • Medical (D.D.S.) University of Missouri – Kansas City School of Dentistry
  • Residency St. Johns Mercy Medical Center

After completing dental school, I returned back home to St. Louis to do my residency right here at Mercy Medical Center. I’ve been practicing at Dr. Waite and Associates since fall of 2013 as an Associate Dentist and attending faculty in the GPR program. I’m happily married with 3 great kids, enjoy golf, the Cardinals, and reading in my spare time.

Dr. Tiffany M. Krimminger, DMD

Specialty: Dental Medicine
Subspecialty: General

Dr. Krimminger


  • Undergraduate University of Central Florida
  • Medical (D.M.D) Southern Illinois University School of Dental Medicine
  • Residency Two-Year General Practice Residency at Mercy Hospital St. Louis

Dr. Krimminger grew up in Southern Illinois and moved to St. Louis after finishing dental school. Upon completion of her two-year dental residency at Mercy Hospital, she joined the practice as an associate. She was excited for the opportunity to stay because of the exceptional quality of care provided to patients, the compassionate team members, and the positive educational atmosphere. She is a member of the Academy of General Dentistry, American Dental Association, Missouri Dental Association, and Greater St. Louis Dental Society. She enjoys practicing all aspects of general dentistry and working with adults, children, and patients with special needs. She volunteers annually at Give Kids a Smile and Missouri Mission of Mercy. In her time away from the office she loves exploring the outdoors, running, baking desserts, and watching movie favorites. In June of 2018 she married her husband Maxim with whom she has a puppy named Zara.

Dr. Karissa Cook, DDS

Specialty: Dental Medicine
Subspecialty: General

Dr. Tiffanny


  • Undergraduate: University of Alabama at Birmingham
  • Medical (D.D.S.): Meharry Medical College School of Dentistry
  • Residency: General Practice Residency at Mercy Hospital St. Louis

Dr. Cook is a compassionate dentist committed to patient education and disease prevention. She states “I’m happy to join Dr. Waite & Associates because it is a practice that fosters a safe environment for patients to be heard and work with the team to achieve total oral health”.
Originally from Sylacauga, Alabama, Dr. Cook moved to St. Louis after completing dental school in Nashville, TN at Meharry Medical College. Here in St. Louis she earned her certificate for advanced training at Mercy Hospital’s General Practice Residency. As member of the Greater St. Louis Dental Society, Missouri Dental Association, and Academy of General Dentistry she devotes time to community service and continuing education. In her free time she enjoys traveling, long walks in the park with her mini poodle, and spending time with family.


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Monday - Thursday: 8am - 4pm
Friday: 8am-12pm

Hours alternate every other week

Monday - Thursday: 7am - 4pm
Friday: Closed

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