Quality Dental Care In Fountain Valley, CA
Your Search for a Dentist Stops at Our Fountain Valley Office Andrew G. Mortensen D.D.S. Welcomes You
Located at 18837 Brookhurst Street, Suite 109, the practice of Andrew G. Mortensen D.D.S. is in the heart of Fountain Valley. We are within easy reach for dental patients all over Orange County.
Take a Look at Our Practice

Learn More About Our Practice Request a Visit with Dr. Mortensen
Accredited by the American Academy of Cosmetic Dentistry, California Dental Association, and Orange County Dental Society, you can rest assured that Dr. Andrew G. Mortensen will help you achieve your goals with a personalized dental treatment plan.
We invite you to contact our Fountain Valley dental office today if you would like to learn more about the cosmetic and restorative dentistry care we offer:
Call Us: (714) 964-4183

5-Star Reviews From Fountain Valley-Area Patients
Dr Mortensen is the best dentist I have ever had. If you have ever had any dentist phobia, they will do what ever they can to make your experience better.
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My dental health Fam is always on time with ALL my dental needs. Dr Mortensen welcomed me to the family back in 1987. I love the fact that my Fam is truthful, knowledgeable and sincere.
And, YASS…I have gave a beautiful smile!!
Meet Dr. Andrew G. Mortensen
After graduating from Northwestern University's Dental School in 1979, Dr. Mortensen moved to the state of California to begin his general and cosmetic dentistry career path.
Even though his career as a dentist spans six decades, Dr. Mortensen still takes continuing education courses to stay on top of new and improving dental techniques and practices.
Dr. Mortensen is accredited by the American Academy of Cosmetic Dentistry, an honor bestowed on only a few hundred dentists in the United States. From his educational background to his awards and accolades, you can count on our dentist to handle all of your dental care needs.

Memberships and Affiliations
Meet Our Staff
Many of Dr. Mortensen's staff members have worked at our Fountain Valley office for over a decade, making them familiar faces to our patients. Meet the people who make our office a warm and welcoming environment:
Jackie Michel, Office Manager
- Jackie is the first friendly face you'll see when you enter our dental practice. She can help check you in, schedule your next visit, and maximize your insurance plan's benefits.
Katie Ledesma, RDA
- Erika has been a dental assistant since the early 2000s and has been an immense help to Dr. Mortensen since the early 2010s. Our patients love Katie's energetic and friendly personality.
Erika Lieber, RDH
- Erika has been a dental hygienist since the early 2000s and has been an integral part of Dr. Mortensen's staff since the early 2010s. With a gentle touch, Erika will make sure your teeth are squeaky clean.
Ashley Davis, RDH
- Ashley has worked as a dental hygienist since the early 2000s and has been a skilled member of Dr. Mortensen's staff since 2020. She's easy to talk to and provides care for your teeth using a gentle hand.
Featured Services
Our most popular procedures include:
General Dentistry
Regular teeth cleanings are vital for maintaining healthy dental hygiene. Our dentistry office offers fillings, inlays and onlays, and TMJ treatment for our patients.
Restorative Dentistry
Dental health problems can be resolved through restorative dentistry procedures, such as dental bridges, dentures, root canal therapy, and full mouth reconstruction.
Cosmetic Dentistry
Our dentist can help minimize cosmetic imperfections of the teeth and gums through dental implants, dental bonding, veneers, periodontal reshaping, Invisalign®, and more.
Porcelain Veneers
Veneers are thin porcelain shells that fit over the front surface of the tooth to conceal cosmetic concerns like chips, cracks, stains, and misalignment.
Dental Implants
Dental implants are artificial tooth roots that support restorations such as crowns, dental bridges, and dentures to replace missing teeth.
Sedation Dentistry
Avoiding the dentist due to fear or anxiety? Our dentist offers sedation options to ensure your dental experience is as comfortable as possible.
Our Complete Services
Get the Process Started
Plan for your visit to our dental practice by filling out our patient forms before your appointment.
Insurance and Financing At Our Fountain Valley Office
Insurance
Our office manager, Jackie Michel, can help maximize your health insurance benefits and determine if our office accepts your provider. Insurance can cover various procedures, but cosmetic procedures are not covered by insurance.
Financing
If you don't have dental health insurance or are undergoing a cosmetic dentistry procedure that's not covered by health insurance, we accept financing through CareCredit® to help you break the cost of treatment into affordable monthly installments.
Another 5-Star Review
"Best dental professional and staff in OC. Been a patient for 12-13 years. Never had a bad experience. Highly recommended." Mike Dickson