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Our Hours

Mon - Thur: 8 AM - 5 PM

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1420 S Mills Ave Suite D,
Lodi, CA 95242

Meet The Team


Dr. Cheung

After finishing his studies at the University of Michigan School of Dentistry in 2017, Dr. Stephen Cheung started his dental journey. For over six years, he’s been helping people get healthier smiles. He’s particularly good at making anxious patients feel at ease. He listens, understands, and genuinely cares. Dr. Cheung enjoys using Invisalign to help straighten teeth. He’s also a member of a few dental associations and has received awards for his work with Invisalign. When he’s not working, he’s a big car enthusiast, loves wine, and enjoys spending time with his wife and two little girls, traveling, and trying out different restaurants.

Front Office Coordinator


Katie Miller brings a decade’s worth of experience to the dental field, having spent the most recent two years managing the bustling front desk at Stephen Cheung DDS. To Katie, her role goes beyond mere appointment setting and scheduling. She deeply values every patient interaction, striving to make each individual feel welcomed from the first phone call until they wave goodbye, with hopefully an even brighter smile than when they arrived.

Always committed to excellence, Katie frequently enrolls in courses that further enhance her proficiency in the world of dentistry.

Outside the office, Katie cherishes quality moments with her family, especially her spirited nieces and nephews. A true food aficionado, she revels in exploring new dining spots. On days she’s not indulging in culinary adventures, Katie can often be found lounging by the pool, basking in the sun with her favorite tunes setting the mood.

Registered Dental Hygienist


Allison Bitz has been a steady hand in the dental world for a decade since getting her AS in Dental Hygiene in 2013. She’s all about making sure patients feel good and comfortable during their visits. Allison loves diving into oral health care and works closely with Dr. Cheung to pinpoint any treatments that might help out.

When she’s off the clock, Allison’s often on her paddleboard or hanging out with her loved ones. And if you’re ever curious about bees, she’s got some stories to share — she and her husband run a beekeeping business together. So next time you’re in, whether it’s for a cleaning or some honey-talk, Allison’s got you.

Registered Dental Hygienist


Kelly Bertsch has been a dental hygienist since 1992. She’s been at it for 31 years and really knows her stuff. Kelly’s all about making sure her patients are comfortable during their cleanings. She keeps up with new things in dentistry by taking classes now and then. Outside of work, Kelly is into cross-fit, traveling, and hanging out with family and friends. She’s a key part of our team and is always there to make your visit a little brighter.

Registered Dental Assistant


Janet Valdivia started her journey in dentistry in 2012, after earning her AAS degree. Over the years, she’s added several certifications like coronal polish, sealants, and X-ray to her skills. Janet’s very detail-oriented; she’s committed to ensuring that patients have a positive experience at the office. When she’s not at work, Janet enjoys spending quality time with her two boys, exploring different activities together. She’s a valuable member of our team and always prioritizes the comfort and satisfaction of our patients.


Janet T.

Meet Janet Thomas, one of our dedicated Dental Assistants. When she’s not assisting with procedures and ensuring patients are comfortable, Janet has a fascinating array of interests. She’s a big fan of Disney and Harry Potter, and can often be found deep in a video game adventure. If you’re ever in the mood for documentary recommendations, especially those about true crime, Janet’s got you covered. Plus, she’s an avid listener of Bailey Sarian podcasts. So, whether you’re here for a dental appointment or just keen on discussing the latest crime docuseries, Janet’s always up for a chat!

Dental assistant


Tera Appling joined our team after completing her studies at Carrington College in 2023. She’s certified in several areas like X-ray, coronal polishing, and infection control, ensuring that our patients receive top-notch care. Tera’s approach to patient care is simple: make them feel as comfortable as possible. She’s there to reassure you and answer any questions you might have.

Tera’s got big plans for the future. She’s preparing to take her test to become a Registered Dental Assistant, and eventually, she aims to train as a Dental Hygienist.

Outside the office, Tera has some unique hobbies. She enjoys drying out flowers she receives and adorning her walls with them. She’s a big nature lover, cherishing long walks during sunset, and if you ever want to chat about the beauty of the sky, day or night, she’s your go-to. She can gaze at it for hours, especially on clear nights!


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