Searching for Quality Dental Care in Fountain Valley, CA?

Your Search Stops at Our Fountain Valley Office Andrew G. Mortensen D.D.S. Welcomes You

Located at 18837 Brookhurst Street, Suite 109, 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.

18837 Brookhurst St
Ste 109
Fountain Valley, CA 92708

Take a Look at Our Practice

Our practice is laid out to welcome each patient that walks through our doors. From our caring front-desk staff to our professional hygienists and dentist, our Fountain Valley office is laid out to offer you the best experience. 
Fountain Valley dental office
Our Fountain Valley office is waiting for you.

Learn More About Our Practice Request a Consultation 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

Andrew G. Mortensen and a team member with a patient in the dentist's chair
Dr. Andrew G. Mortensen and his team provide excellent care.

"Dr. Mortensen and staff are the best!" 5-Star Reviews From Fountain Valley Area Patients


Lynn Black


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Dr. Mortensen and staff are the best! I've recommended a lot of people here and everyone loves them.

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Tom Moran


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I have been going here for years and Dr Mortensen has been one of the best I have ever had!

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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.

Andrew G. Mortensen with team members
Dr. Mortensen has trained at one of the top post-graduate programs in the United States, the Las Vegas Institute.

Memberships and Affiliations

AAD Accredited Member logo
ADA logo
ICOI logo
LVI Trained logo
Best Dentist Orange County (2010) logo
Opencare Patientsʼ Choice Winner (2015) logo
DOCS logo

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 appointment, 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. 

Communities We Serve

Our dental practice is conveniently located in the heart of the Fountain Valley. We are easily accessible to individuals from different Orange County communities, including:

  • Newport Beach
  • Costa Mesa
  • Huntington Beach
  • Santa Ana
  • Irvine
  • Long Beach

Stunning Before and After Transformations

Dr. Mortensen can create a customized treatment plan to facilitate your dental transformation. Take a look at these dramatic results.
Before Dental Implants
Before Dental Implants
After Dental Implants
After Dental Implants

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


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.


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.

Featured Services

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.

Learn More About General Dentistry

Restorative Dentistry

Dental health problems can be resolved through restorative dentistry procedures, such as dental bridges, dentures, root canal therapy, and full mouth reconstruction. 

Learn More About Restorative Dentistry

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.

Learn More About Cosmetic Dentistry

"Always a five star experience." More 5-Star Reviews From Fountain Valley Area Patients


Paula Bevans


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Always a five star experience. Great dentist with exceptional staff.

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Mike Black


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Great dentist. Very painless procedure and quick recovery.

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Andrew G. Mortensen, DDS

Andrew G. Mortensen, DDS

Dr. Andrew Mortensen is a top-rated dentist with training from the world-famous Las Vegas Institute. His exceptional care and expertise have earned him hundreds of 5-star reviews, and he is an accredited member of the:

  • American Academy of Cosmetic Dentistry
  • American Dental Association
  • California Dental Association
  • Orange County Dental Society 

Ready to schedule a consultation at our Fountain Valley dental practice? Request an appointment online or call us at (714) 964-4183.

Contact Us Today

Reach out to us today to set up an appointment and strengthen your oral health.
"I am proud to have served patients in our community. Through continuing education and state-of-the-art equipment, we are able to offer you and your family the high level of care you're looking for." Andrew G. Mortensen, D.D.S.

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Google map image of our location in 18837 Brookhurst St Ste 109 Fountain Valley, CA

Fountain Valley Office

18837 Brookhurst St
Ste 109
Fountain Valley, CA 92708

Closed Today

(714) 964-4183 Send a message