Kathy Maasoumi Dentistry
Kathy Maasoumi, DDS:
Practice Profile Page


Kathy Maasoumi Dentistry
Kathy Maasoumi, DDS
Lake Forest, CA













A list of major dental treatments which I offer my patients:

Dental cleaning

White fillings


Inlays & onlays


Clear aligners

Porcelain veneers

Teeth whitening

Dentures & partials

Root canal treatment

Tooth extraction


Offers Even28 at-home™? No

Offers Even28 at-dentist™? No

Offers Invisalign®? Yes


Monday: 9:00 am to 6:00 pm

Tuesday: 9:00 am to 6:00 pm

Wednesday: 9:00 am to 6:00 pm

Thursday: 9:00 am to 6:00 pm

Friday: 9:00 am to 6:00 pm

Saturday: Closed

Sunday: Closed





Check out what some of our happy patients are saying about us:

Arman A. from Aliso Viejo, CA (Source: Yelp)


Dr. Maasoumi is fantastic, with over 25 years of experience she’s by far the best dentist I’ve ever seen i recommend her and her office without hesitating because she is the best at what she does. I really enjoyed my treatment because she connects with her patients and makes them feel comfortable and at ease

Brithney W. from Irvine, CA (Source: Yelp)


I highly recommend Dr. Maasoumi.  She’s knowledgeable and gentle, she explained my treatment clearly before starting to work on me.  She also has incredible, reasonable prices, and her work is awesome.  I’m not afraid of dentists anymore.  Her office is clean, with all high tech. equipments.  Her staff are extremely friendly and accommodating, they make you feel right at home 🙂  She is very flexible with her scheduling as well

Mary N. from Downey, CA (Source: Yelp)


hi everyone if you want to take a good dental care with best price go to this office. i had gone to many dentist befor , but after knowing this dentist and comparing with another dentist ,i see that i had wasted many money to another dentist and also bad result . i am so thankful to dr masoumi for her good proffesional job on my teeath ,i recieved best dental care with the lowest price in a friendly place

Tina K. from Irvine, CA (Source: Yelp)


I went to Dr. Maasoumi to get some major dental work done. I was greeted by kind and personable staff. The wait was not long and I was seen at my scheduled appointment time. Her office is clean and everything is organized. Moreover, she is knowledgeable and professional. She constantly asks if you you are doing okay or if you feel any pain. She took time to explain the process to me and was patient with my questions. I thought I would have to pay a good amount of money for the amount of work I was getting done but she was able to give me a good price even though i don’t have insurance. Overall I would say I left her office smiling wide and extremely satisfied with my experience 🙂

Russell Acosta (Source: Google)


I wish to thank Dr. Maasoumi for her wonderful work that she did for me with my dental procedure. It may be a little office, but they have a big heart and knowledge when it comes to thier patient needs. It was my first time, and I will be back for future appointments.  Thank you Dr. Maasounmi, and thank you, to your team

Nancy S. from Mission Viejo, CA (Source: Yelp)


Dr. Maasoumi and her staff are very thorough, friendly and professional.  I am impressed with how they check in on my comfort level, and did not cause any pain during my procedure.  Very nice office, glad to be going there

Kian M. from Laguna Niguel, CA (Source: Yelp)


Dr kathy has been my most trusted dentist that i go to . Me and  my son has been going to her in past 20 Years . If you want honest opinion and treatment , she is the one . Very clean office and caring dentist . I laugh about some comments here for her because i am sure every one has their personal fear and life experiences and sees things in different light . But i just love her as my forever dentist . Her works lasted me for many years . I highly recommend her

Paige E. from Los Angeles, CA (Source: Yelp)


Dr. Maasoumi is amazing!!! She has been practicing dentistry for over 25 years! She went to one of the best dental schools in the country. USC School of Dentistry is not only profound academically but they are also known for their unique Hands-on Dental Program. She’s won Best Dentist in Downtown LA a few years in a row but now has moved to Orange County in Lake Forest. I have been seeing her for 20 years now. She does all mine and my sister’s dental work she has even done my braces and I still get compliments on my perfect smile!! I would recommend her to anyone who wants quality dental work. She is so nice and compassionate she will even go out of her way to make sure everything goes smoothly and that you are comfortable

N. T. (Source: Zocdoc)


I highly recommend, if a personal touch is what your looking for. For what it’s worth, I see everyone gets treated the same, with the same professionalism. If a person is looking to not be just another number come to Dr. Kathy Maasoumi, she and her staff are the best. The compassion is genuine.

Kas M. from San Francisco, CA (Source: Yelp)


I saw Dr. Maasoumi back in April. I had to go to her again for my fillings and crowns. She delivered 100% again. I love going to her. She works with me financially and I appreciate everything she has done for me

Sonia N. from Irvine, CA (Source: Yelp)


It’s so so hard to find a good dentist – that does good work and that you can trust!!   I’ve been coming to her for years and I’ve always enjoyed my interactions with her and her staff. She’s an extremely competent and skillful dentist and easy to talk to. I have been a patient of Dr. Maasoumi for past 19 years and she is very knowledgeable and has a gentle and caring hand. I highly recommend her for anyone. Dr. Maasoumi has been treating my kids and  family since she started her practice in Los Angeles 19 years ago

Shirin M. from San Francisco, CA (Source: Yelp)


I don’t understand why yelp keeps deleting my reviews of Dr. Maasoumi! She’s truly a wonderful dentist. Over the years I’ve had 2 of my wisdom teeth removed, done 3 root canals and a crown and I’m currently having the clear correct done (similar to Invisalign) and Dr. Maasoumi has been nothing but amazing! She always accommodates my busy schedule and personally calls after procedures to make sure I’m doing ok. I absolutely love her and she’s taken the dread and stress out of dentist visits. Don’t let a couple of disgruntled patients scare you. Go see her yourself and you won’t be sorry. I highly recommend her!!!

Andrew Zambetti (Source: Google)


Until Dr Maasoumi I didn’t realize that none of the teeth cleanings throughout my life were as thorough as they were supposed to be. My mouth felt like a new mouth. Also she pointed out why I had certain pain in my teeth or gums and how to fix it. She is a true expert and is very easy to work with. Plenty of Parking to visit as well. If you are in the area you must use her!

Ali A. from Central LA, Los Angeles, CA (Source: Yelp)


I had pain in right side of my head and jaw for a week and I couldn’t find out the reason. After taking a x-ray and 5 min examination, Dr Maasoumi found out the reason of that pain and worked on my teeth. During her work, i was relax and didn’t feel any pain. I’m really happy cause now I don’t have any problem at all. I like her manner, attitude, and work ethics. I recommend her to my friends and relatives

Marna T. from San Jose, CA (Source: Yelp)


this dental office is good for any one who need a good dental care with fare price . no hide payment ,and many time lower price than another offices.me and my family are her patients for many years and we are satisfy with good management and nice behavior of staff and dr

Majidreza T. from Tustin, CA (Source: Yelp)


i am so shocked with some of comments here . i went to this dental office ( dr katy masoumi) and everytime ,she was as good as someone exepct ,a wonderfull treat, nice and kind person,very knowledgable, and proffesional.the most important thing about her is that she was so flexible and cooprative about price ,not only to me but also the every patients that i reffered to her    ( some times very low prices depending to patient financial situation) i think she works exelent ,and not only she dont charge more than normal but i think very lower than normal price compare to same dentists

Christopher H. from Irvine, CA (Source: Yelp)


She is one of the finest dentists I have ever had. She was patient, caring, knowledgable and helpful. I have a mediocre insurance and despite all the trouble the insurance gave me she worked with me and helped me get my teeth clean, fillings and two crowns. She is just amazing. Thank you Dr Maasoumi if you read this

J. M. (Source: Zocdoc)


Dr. Massoumi is an absolute treasure. She is caring, understanding and very gentle. She takes her time to explain everything in detail and continuously checked to make sure I was okay during my root canals. I highly recommend her.

Reza P. from Irvine, CA (Source: Yelp)


I  have been in multiple dentist offices so far but she is the best dentist that I have ever seen. First of all , there is no delay in front desk . Second they start their work on time. Third  she has wonderful and kind staff. Fourth her office is very clean. Fifth She does a great job. sixth she is fair in charging and at the end you leave the office with smiling face

Mahsan F. from Irvine, CA (Source: Yelp)


Dr. Maasoumi is a phenomenal dentist. She’s very patient and really takes the time to make sure you are comfortable. She’s very knowledgeable and explains everything she is doing. Her staff is also fantastic!!!! Over the years I have seen several dentists and I have never had a better experience. Her office is small and cozy. She accommodated my appointments with my busy schedule and her front office staff is always professional and friendly. I never noticed anyone else waiting either. I’ve always wanted a Hollywood smile, but never thought I could afford it, and was also very scared about the procedure. After visiting with her and her staff a couple of times, it became very clear that she is the dentist for me, and worked with me on pricing based on my needs. She took the time to explain the process to me, and made suggestions based on my smile, jaw, facial structures, and overall look. I now have a beautiful “HOLLYWOOD” smile that I am totally in love with.  I couldn’t be happier with the results! Typically, I experience a lot of pain and sensitivity post treatment, but following Dr. Maasoumi’s services I felt completely fine. She has a very light hand and her injections go unnoticed.

Sayeh N. from Irvine, CA (Source: Yelp)


I have been going to Kathy Maasoumi for over 10 years. She is an exceptional dentist whom is caring, kind, professional, wonderful, and knowledgeable. Being a curious individual who always wants to learn, I would ask her about my dental care and how to care of my teeth. And she was always patient with me and intelligent/informative in her responses. I learned a great deal about my dental health from her! She was amazing with my teeth regarding orthodontics, fillings, and preparation/post-recovery of my maxillofacial surgeries. She was very supportive when I had braces; and also before/after having maxillofacial surgery for my unequal jaw growth on my face. If it wasn’t for her support, honesty, and integrity as my dentist, I don’t know how I would have recovered from my major jaw surgery. She was there for me every step of the way during my 1 year recovery period with follow up appointments. I’m blessed with a beautiful smile because of Kathy Maasoumi’s competent work and collaborative work with my oral maxillofacial surgeon! Also, she was there for my recovery from extraction of wisdom teeth with another oral maxillofacial surgeon. I’m a lucky girl to have had Kathy Maasoumi as my dentist. I have a lot of respect for her after all the hard work she did for my teeth. Every day when I look at my smile, I remember the time and effort she dedicated to my teeth. I used to have difficulty in speaking, eating, swallowing, and breathing due to my improper teeth alignment and unequal bone growth. Now, I have no difficultly..and words can’t describe how fortunate I feel to be able to eat with no pain, speak, swallow, and breathe well for the rest of my life!


Dr. Maasoumi graduated from USC school of dentistry 1994. She has been practicing in Los Angeles and Orange County since then. She is a general dentist with gentle hands that had extra training for orthodontics and implant dentistry. She is a preferred provider for most ppo insurances. She also offers a discounted dental plan to cash patients. A message from Dr Kathy: My passion is helping people and I love working with my hands. Making changes in people's smile is phenomenal and it brings me such a good feeling to make a difference in people's lives. As a female that enjoys both art and science, I was attracted to dentistry because it was a blend of both. I graduated in 1994 from the USC School of Dentistry and I am a Trojan! I am a General Dentist, and I have received additional training for Implant therapy.