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Hear from satisfied patients and see the results a skilled dentist can provide.

A Reason to Smile

Welcome to the office of Andrew G. Mortensen, DDS! Dr. Mortensen has proudly served Costa Mesa, Huntington Beach, Fountain Valley, CA, and all of Orange County for many years. At our dental practice, we emphasize cosmetic dentistry and are dedicated to designing dazzling, healthy smiles for our patients. We combine state-of-the-art technology, modern materials, and dental expertise to improve your smile easily, comfortably, and, often, permanently. You'll be amazed at what we can do.

Whether you are in need of a subtle change or a full mouth makeover, Dr. Mortensen can provide aesthetically pleasing solutions that contribute to strong oral health. Contact us today to schedule a consultation!

What Sets Dr. Mortensen Apart


Dr. Mortensen has over 30 years of experience as a dentist. He has been voted the best dentist in Orange County and Opencare Patients' Choice Winner. He received training at the prestigious Las Vegas Institue and is a member of several professional organizations.


Many people avoid trips to the dentist because they are afraid of dental treatment. However, regular dental attention is necessary for maintaining strong oral and overall health. To make you more comfortable, Dr. Mortensen provides multiple sedation options.

Versatile Solutions

Dr. Mortensen can provide excellent general, cosmetic, and restorative dental care at his office in Fountain Valley, CA. Whatever your unique dental needs and goals are, Dr. Mortensen can address them in one place and help you achieve excellent and lasting oral health.

Advanced Technology

Our dentist utilizes advanced technology like cone beam 3-D digital scanners and digital x-rays. These technologies are better for your health than older imaging methods as they expose you to less radiation, and they provide more detailed images to precisely address your needs.

"The Very Best Dentist."

Whitney L.

Whitney L.


The very best dentist. I used to live in southern California but have since moved to Washington state.  I have yet to find a dentist as wonderful! He and his staff are so kind, knowledgeable, full of integrity (they don't tell you to get extra stuff you don't need), and gentle. Also his work is amazing. I had several fillings done by Dr. Mortensen and my hygienist in Washington couldn't even tell where until I told her I had several and she looked at the x-ray! View On Google

Thomas K.

Thomas K.


I've been going to Dr. Mortensen for over 15 years now I believe. He's the best dentist I could ever recommend. The team is amazing and I have never had anything but the best service and experience there. Dr. Mortensen has always been the type of dentist who actually cares about his patients and loves what he does. He's been taking care of my family for longer than I can remember and never disappoints. We couldn't ask for a better dentist! I'd recommend him and his team to anyone who wants the best service, best work, and best experience! View On Google

Welcome From Our Friendly & Dedicated Staff

As a Las Vegas Institute-trained dentist with an accreditation from the American Academy of Cosmetic Dentistry, you can trust Dr. Mortensen to provide superlative care and beautiful results. With more than 30 years of experience to call upon, he can handle any dental need.

Excellence In dentistry

Meet Dr. Mortensen

Dr. Mortensen receiving award with colleagues
Dr. Mortensen with hygienist and patient

A talented and skilled dentist, Andrew G. Mortensen, DDS, has been creating beautiful smiles in Fountain Valley, Huntington Beach, and all of Orange County for more than 30 years. Dr. Mortensen is an accredited member of several renowned organizations, including the American Academy of Cosmetic Dentistry, American Dental Association, California Dental Association, and Orange County Dental Society. He also trained at the Las Vegas Institute, which is widely recognized as one of the very best programs in the industry. This unique background allows Dr. Mortensen to offer the most advanced techniques and treatment plans available today.

Dr. Mortensen is not only a wonderful dentist, but also a wonderful person. He has stayed knowledgeable in his field and uses the latest technology.

Lois W.
Premium Care

Schedule Your Visit Today

Committed to Providing Beautiful Smiles

At the practice of Andrew G. Mortensen, DDS, we believe our combination of skills, amenities, and expertise lets us provide care that leads to optimal oral and overall health. Whatever your dental needs, we can help.

Come see why we are Huntington Beach and Fountain Valley's favorite option for cosmetic dental treatment. Book an appointment today by contacting us online or calling (714) 964-4183.

Office of Dr. Mortensen

Services for Every Need

Dr. Mortensen is proud to offer a wide array of general and cosmetic procedures, including porcelain veneers, teeth whitening, dental bonding, and TMJ disorder treatment. We can also calm our patients' fears of going to the dentist through sedation dentistry, allowing us to provide a full range of restorative procedures with virtually no pain. In addition, our Fountain Valley office near Huntington Beach features all the latest dental technology that makes visits to the dentist easier and more relaxing – whether you simply need a set of x-rays or a full mouth restoration with dental implants.

Dr. Mortensen and staff

Featured Procedures

Porcelain Veneers

Dr. Mortensen can attach these thin ceramic shells to the surface of teeth, obscuring any imperfections like cracks, chips, and discoloration. Porcelain veneers are durable, easy to maintain, and virtually impossible to distinguish from natural teeth.

Teeth Whitening

Patients often cite the coloration of their teeth as a source of embarrassment. Dr. Mortensen can provide in-office and take-home treatments at our Fountain Valley office that can whiten your teeth and give you a smile to be proud of.

Dental Crowns

Dental crowns are prosthetic caps that cover decayed, damaged, or broken teeth. Crowns are custom-designed based on the unique needs and appearance of your smile, and they can restore both form and function to your bite.

Dental Bridges

Bridges are a great cosmetic and restorative option for patients with missing teeth. Bridges restore gaps in your smile by securing prosthetics between natural teeth. Modern bridges offer beautiful aesthetic results for a much healthier-looking smile.

Dental Implants

For qualifying patients, implants can be the best option for restoring missing teeth. Unlike other restorations, implants replace tooth roots, which is best for your longterm oral health. Plus, implants can last a lifetime.

Full Mouth Reconstruction

For patients with multiple cosmetic or restorative needs, Dr. Mortensen can design a custom treatment plan involving multiple procedures. Full mouth reconstructions have the potential of changing patients' lives.

All Procedures

More 5-Star Reviews

Debbie S.

Debbie S.


My family has been going to Dr. Mortenson for many years and you Cant get any Greater! Not only is he super Nice and Caring...his entire staff is too! Recently, my 84 year old mother fainted and broke 4 of her front teeth...even though Dr. Mortenson was extremely busy full with patients, he took my mother in to quickly bond her teeth in order to save them! I am forever Greatful! Dr. M also did my father and my Veneers and they are Perfect! He's a Great Dentist both medically and Cosmetically!
    A+++++ View On Yelp

Jeff R.

Jeff R.


Came in with years of discomfort and neck pain/headaches, and because of Dr. Mortenson and his staff my symptoms have been virtually eliminated. I got fitted with an orthotic that helps my jaw alignment and it has changed the way I sleep, eat, play sports, everything. Love these guys and all they did for me. Beyond all that, the whole staff is super caring and you can legitimately tell they enjoy what they do.

10/10 would recommend. View On Yelp

Contact Our Practice Today

Serving Fountain Valley, Huntington Beach, and all of Orange County, Dr. Andrew Mortensen's practice is a premier source for cosmetic, implant, sedation, and general dentistry.

The health of your smile is important to us. Schedule a consultation or appointment today by contacting us online or calling (714) 964-4183.

Committed to Your Comfort

Sedation Dentistry

We understand that some patients may feel too anxious to sit through dental treatment, so we offer a variety of sedation options to help you relax, including oral conscious sedation. If you are afraid of the dentist, Dr. Mortensen and his staff in Fountain Valley will make every effort to put you at ease and ensure you are calm throughout your visit.

Sedation dentistry patient

Awards and affiliations

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

Veneers By Dr. Mortensen

Authored by Dr. Mortensen

Andrew G. Mortensen, DDS, Inc.

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.

Dr. Andrew Mortensen's office

MessageOur Staff

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.

VisitOur Office

Fountain Valley Office

18837 Brookhurst St
Ste 109
Fountain Valley, CA 92708

Open Today 7:30am - 4:30pm

More Info Directions (714) 964-4183

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Fountain Valley Office

18837 Brookhurst St
Ste 109
Fountain Valley, CA 92708

Open Today 7:30am - 4:30pm

More Info Directions (714) 964-4183