Meet The Team

Come Meet Santa Rosa Dental Care Team of Hygienists, Office Staff & Dental Assistants

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.


Tiffany Boyle, RDA

Tiffany grew up in Sonoma County. She loves to spend time with family and friends and often goes camping with her husband and two daughters. Tiffany knew in high school that she wanted to become a dental assistant. In 2003, she graduated from Santa Rosa Junior College with her Associate in Science degree and Certificate of Dental Assisting. Dr. Waggener hired Tiffany right out of school and the two have been working side by side ever since. Tiffany is extremely knowledgeable and current in her field and has a wonderful touch with patients. She takes the time needed to educate patients about their dental procedures and to alleviate any concerns they might have about their upcoming care.


Holly Maddocks

Holly Maddocks graduated from the Santa Rosa Junior College dental assisting program in 2003, where she has been in the dentist field ever since. Born and raised in Sonoma County, where her and her husband continue to live and raise their family. Outside of the dental office, Holly loves being outdoors, gardening and spending her time with her friends and family.


Cori Wickersham, RDH

Cori grew up in Fresno, CA. She graduated from the Foothill College, Los Altos dental hygiene program in 2004 and began working with Dr. Waggener that same year. Cori lives in Healdsburg with her husband and two children. She enjoys spending time with her family especially when they are on their boat in Lake Sonoma. Some might say Cori is a chatterbox but for her patients her stories and laughter are not only entertaining but a nice distraction.


Deborah Davis, RDH

Debbie grew up in Wyoming where she graduated from Sheridan College with a degree in Dental Hygiene. Debbie and her husband moved to Santa Rosa in 2001. They spend much of their spare time remodeling their home. She loves the great outdoors and cooking but her greatest passion is her two daughters and four grandchildren. Debbie truly cares about her patient dental health and well-being.


Tina Cohenour, RDH

Tina was born and raised in Santa Rosa. She has been practicing as a Registered Dental Hygienist for many years and is still very passionate about her profession. She has two grown sons who are also passionate about their professions. Her oldest, Kenny, complete his PhD in the ‘Biology of Aging’ and continues his research at the Buck Institute in Novato. Her youngest, Cody, is an Entomologist who works in his field outside of Portland, Oregon. When not engaged in helping patients learn about their dental health, Tina loves to be in the garden or baking and cooking in the kitchen. She also loves to ride her mountain bike in Annadel or join friends for a road ride.


Carmen Rumbeck , RDH

I've been fortunate enough to be part of this fantastic crew for the past 3 + years and look forward to many more. My passion for dentistry started (farther back then I'd like to admit) in the USAF as a prophylaxis technician and assistant. This evolved through many adventures into my current registered dental hygienist role over 12 years ago in North Carolina. I have since practiced in Southern California and Colorado before settling in Guerneville. I take pride in my profession and am dedicated to providing outstanding care to both our patient's and establishing lasting relationships with new ones. When I'm not in the office, you'll probably find me either running the trails, reading, wondering why I'm watching season 5 of a mediocre show on Netflix, hanging out with my trophy husband, Scott, and our pups, Cecil & Eleanor.


Gaby Felix

Gaby joined Dr. Lehman & Waggener's dental team in 2018. From a young age she has always enjoyed dentistry and now enjoys & takes pride in getting to know and helping our patients. Gaby Says "I am extremely proud to work with a wonderful & passionate team. My goal is that our patients are happy with every aspect of their visit. I always look forward to greeting our wonderful patients." When Gaby is not in the office, you will find her spending time with her husband Jonathan and pup Luna. She enjoys traveling, hiking, reading & spending time as a volunteer Bible instructor.