Where Orthodontic Care Meets Confident Smiles in Tustin, CA & Orange County

At Tustin Heights Orthodontics, we believe every smile deserves expert, personalized care. We proudly provide comprehensive orthodontic care using Invisalign®, braces, expanders & airway-focused treatment approaches for patients of all ages.

Dr. Linda Phi, DDS, MS, MSD is a Board-Certified Orthodontist in Tustin & Orange County.

OUR SERVICES

  • Line drawing of three different trees on a horizontal line.

    WE TREAT KIDS, TEENS & ADULTS

    We can treat the entire family!

  • Minimalist black line drawing of a leaf and flowing water on a white background, symbolizing airway.

    AIRWAY-FOCUSED

    We offer RPE (Hyrax), Invisalign® expanders, and MARPE

  • Invisalign and clear aligner line drawing of a set of upper and lower teeth and an arrow pointing from the upper to the lower set.

    INVISALIGN® FOR KIDS & ADULTS

    Don’t want braces? This is the choice for you!

  • Line drawing of a tooth with braces, showing a tooth with a band and brackets.

    BRACES FOR ALL AGES

    We offer both traditional (metal) and clear braces.

  • SURGICAL ORTHODONTICS

    Advanced jaw surgery solutions for lasting oral health and sleep apnea

MEET DR. LINDA PHI

A smiling female healthcare professional in a white coat holding a folder, standing in a modern medical office with a logo that reads 'Linden Heights' in the background.

Since the age of 10, Dr. Phi wanted to become an orthodontist. After she had her braces, she was able to smile more, laugh more, and express herself to the fullest. In return, she wants to give all her patients the same experience: an increased confidence in both their smile and self-growth. She believes in treating her patients with the plan that best suits their needs, whether it is early treatment, braces, or Invisalign. Her goal is to give her patients a healthy smile utilizing the latest technology, and to provide the highest quality service to them and their families.

EDUCATION:

UCLA: Doctor of Dental Surgery (D.D.S.), M.S. in Oral Biology, B.S. in Neuroscience

University of the Pacific: Orthodontics Certificate, M.S. in Dentistry (M.S.D.)

PROFESSIONAL:

UCLA: Clinical faculty

American Board of Orthodontics: Board Certified, Diplomate

AAO, PCSO, CDA, EHASO

FAVORITES:

Disneyland Rides: Matterhorn Bobsled, Incredicoaster

Dessert: Jasmine Milk Tea with Boba (25% Sweet)

Sports Team: LA Lakers

✨ LEARN MORE ABOUT DR. LINDA PHI ✨

Our Patient Reviews

  • "I previously had traditional braces years ago with a different orthodontist, and I chose to do Invisalign with Dr. Phi because she is professional yet personable. She explains things in a way that is easy to understand with her expert knowledge. She has amazing attention to detail. You can feel that she truly cares about you. You can tell that she wants the best for you and she’s on your side. As a patient on her second orthodontic treatment, I wish that I had gone to Dr. Phi for my initial treatment!"

    — Nancy T.

  • "My daughter Lila and I had such a wonderful experience at Tustin Heights Orthodontics. Dr. Phi tspent so much time walking us through our options for braces and Invisalign. She gave us incredibly thorough, thoughtful advice and explained everything with such honesty and transparency. We never felt rushed or pressured — just genuinely cared for. You can tell she truly wants the best outcome for each patient."

    — Melissa H.

  • "I have had the pleasure of being cared for by Dr. Phi. She is meticulous, thoughtful and beyond compassionate. The bar she sets for herself is near perfection so know that she will consistently strive to achieve that for you. I am so happy with my results and can’t imagine having a better orthodontist."

    — Eric T.

  • "I can’t say enough great things about Dr. Phi. She’s the kind of provider who really listens, explains everything clearly, and makes you feel taken care of from the moment you walk in. She’s incredibly kind, so smart, and her skill level really shows in her work. Her whole team — from the receptionist to her assistant — is just as attentive and sweet, which makes every visit feel comfortable and welcoming. I genuinely love coming here. Highly recommend to anyone looking for an orthodontist you can trust."

    — Nicky S.

  • "Dr. Linda Phi and her team at Tustin Heights Orthodontics are incredible. She’s not only amazing at what she does, but she’s also kind, patient, and genuinely cares about her patients. You can tell she puts real thought into every detail and wants the best outcome for you."

    — Michael H.

  • Modern orthodontic office waiting area with white walls, wooden flooring, seating with wooden frames, plants, and a sign that reads "Tustin Heights Orthodontics."
  • Modern and minimalist reception area with wooden and white decor, watercolor artwork on the wall, a reception desk, a small refrigerator, and a potted plant near the glass door.
  • Modern reception area with a white counter, decorative shelves, a small wine cooler with drinks inside, a potted tree, and large glass door with outdoor view.
  • Empty medical consultation room with a grey examination chair, a wooden desk with a computer, white chairs, and decorative plants.
  • Modern medical treatment room with multiple dental chairs, monitors, and overhead light arms, decorated with a mountain and tree mural mural on the wall, and wood flooring.
  • Modern bathroom with two oval mirrors, double sinks, white cabinetry, beige wall paneling, pendant lights, and a hallway with wooden flooring and glass doors.
  • A modern dental examination room with mint green walls, a dental chair, a mounted flat-screen TV, and framed mountain posters.
  • Decorative wall with multiple green arrow-shaped designs pointing upwards, and an inset illustrating a small white shape on a green background.
ABO Board Certified American Board of Orthodontics black-colored seal with laurel wreath design, with the establishment date of 1929
Logo of the American Association of Orthodontists with blue and white color scheme and the organization's name.
UCLA logo in white on a blue background.
Logo of the Pacific Coast Society of Orthodontists with blue waves and the initials PCSO.
University of the Pacific logo with the university name in large orange and gray text.
California Dental Association logo with the letters 'cda' and an orange abstract design above, and the text 'California Dental Association' to the right.
EHASO The Angle Society logo with stylized text and a swooping pink arc