Dr. Elena Rumack is among a select few board-certified specialists in pediatric dentistry. She has been providing exceptional care to infants, children, adolescents, and those with special needs since 2002.

Dr. Elena obtained her DDS degree from UCLA. After completing a year of general practice residency specializing in the care of special needs patients, she discovered that working with children was her passion. She returned to UCLA to complete another residency specializing in pediatric dentistry.

Affectionately known as the “Tooth Whisperer” to her patients, Dr. Elena has a special way of putting children at ease. Her empathy for children encountering dental care for the first time allows her to put herself in their shoes. By letting them take an active role and, where possible, giving them options on how care is provided.

Dr. Elena alleviates the anxiety many children feel when going to the dentist. Establishing this initial trust allows her to treat her patients gently and effectively. In addition, she employs special techniques to deliver dental injections so painlessly that most of her dental patients don’t even know they’ve been given a shot!

Dr. Elena strongly believes in preventive dentistry and as such, focuses on nutrition, prevention, education, and positive reinforcement in a nurturing environment. To encourage early prevention of dental disease, she prefers to begin her doctor-patient relationship with your child by age one, as recommended by the American Academy of Pediatric Dentistry and the American Academy of Pediatrics.

Her vision is to expertly serve the community and to further awareness of oral and general health. Dr. Elena also furthers dental education at the professional level, serving as a lecturer and providing clinical instruction at the UCLA Department of Pediatric Dentistry, teaching both pediatric residents and dental students.

When away from the dental chair, Dr. Elena loves being a mom to her two boys. She also enjoys golf, tennis, skiing, scuba diving, traveling, and reading. She is married to William Rumack, M.D., an orthopedic surgeon at West Hills Hospital.



Dr. Lecia Harmer was born and raised in Michigan. She attended the University of Michigan and graduated with a B.S. in Biochemistry with High Honors. Tired of the relentless weather, Dr. Harmer decided to attend UCLA School of Dentistry. In 2006, she received her D.D.S. concurrently with her M.S. in Oral Biology from UCLA. Dr. Harmer was elected by her professors into the national dental honor society Omicron Kappa Upsilon (OKU), an honor given to only the top 10% of the graduating class. Dr. Harmer also received UCLA’s award in Pediatric Dentistry, given to the top two students demonstrating promise in the field of pediatric dentistry.

Dr. Harmer completed her pediatric dental residency at UCLA in 2008 and became board certified by the American Board of Pediatric Dentistry in 2009. Dr. Lecia is a member of the American Academy of Pediatric Dentistry, the American Board of Pediatric Dentistry, the California Society of Pediatric Dentists, the San Fernando Valley Dental Society, and the National Association of Professional Women.

In her free time, Dr. Harmer enjoys playing soccer and cheering for the Lakers (her dog is affectionately named Kobe).



Dr. Jean Kang was born and raised in Los Angeles, California. She grew up in the city of Diamond Bar and she graduated from Scripps College with a Bachelor of Arts degree in Biology. Dr. Kang obtained her Doctor of Dental Surgery degree at UCLA where she was awarded the Wyatt Rory Hume Scholarship for her dedication to community service. She then completed her pediatric dental residency at UCLA in affiliation with the Ronald Reagan Medical Center where she was the Chief Resident and received the Section of Pediatric Dentistry Award and the Scott Jacks Award of Excellence for Outstanding Resident.

Dr. Kang also currently serves as faculty at the UCLA Department of Pediatric Dentistry. She is also a member of the American Academy of Pediatric Dentistry, California Society of Pediatric Dentistry, and the Southern California Society of Pediatric Dentistry.

Besides providing individualized quality care to her patients, Dr. Kang believes in fostering long-lasting relationships with her patients and their families and providing them with a dental home where they can learn to lead happier and healthier lives. She also believes in empowering children and their families to make choices for a lifetime of good oral health and providing positive experiences that will enrich their lives.

In her free time you can find Dr. Kang traveling with her husband, spending time with her family and friends, and she is always up for a virtual Peloton ride!



After graduating from UCLA with a B.S. In physiological sciences, Dr. Jason traveled north to dental school, where he attended UCSF. He graduated #2 In a class of 91 and was elected to Omicron Kappa Upsilon (OKU), the national dental honor society. He completed his orthodontic residency In 1999 at UCLA, where he was chief resident. His research project was published In the American Journal of Orthodontics & Dentofacial Orthopedics, the leading peer-reviewed journal in the profession.

Dr. Jason serves on the board of the San Fernando Valley Dental Society, where he was president In 2007. He Is a clinical Instructor in the UCLA orthodontic residency program. He continues to lecture to UCLA dental students and orthodontic residents and served as alumni president in 2006. He is a member of the American Association of Orthodontists, the American Dental Association, the California Dental Association, and the Pacific Coast Society of Orthodontists. In recent years, besides lecturing at UCLA, he has lectured to the California Dental Assistant Society, the San Fernando Valley Dental Assistant Society, the ROP program of Santa Clarita, and to the students, faculty, and alumni of the University of Francisco Marroquin in Guatemala.

Dr. Jason has 4 four children and with his wife, Janette, they love to travel and hike. Dr. Jason also enjoys surfing, skiing, photography and woodworking. He has participated in various volunteer dental organizations, traveling to Guatemala, Mexico and Israel.



Dr. Michael Hoang is a board-certified orthodontist who grew up in sunny Southern California. He graduated magna cum laude from University of California, Irvine where he earned his B.S. in Biological Sciences and was inducted into Phi Beta Kappa Honor Society. He then continued his education at UCLA School of Dentistry, where he graduated with honors. Finally, he stayed to complete his Orthodontic residency at UCLA, where he served as chief resident and concurrently earned his M.S. in Oral Biology.

Dr. Michael comes from a Bruin family of dentists, joining his father who also graduated from UCLA Orthodontics and his sister, who recently graduated from UCLA School of Dentistry. At UCLA, Dr. Jason Pair served as his clinical instructor during residency. Recently, Dr. Michael has joined Dr. Jason to lead treatment planning seminars at UCLA Section of Orthodontics and provide technical clinical instruction to the residents. He currently serves as President of the UCLA Orthodontic Alumni Association and is a member of the American Association of Orthodontics, the California Association of Orthodontics, the American Dental Association, the California Dental Association, and the Western Los Angeles Dental Society.

Dr. Michael enjoys spending time with his family and friends, hiking, and traveling internationally. He has participated in various volunteer dental organizations, traveling to Honduras, Mexico, and Vietnam.



Meet our newest team member, Dr. Teddy.

He is an 11-year-old mini Pomeranian. Teddy has joined us to make patients feel more at ease during their visits here at our pediatric dental office. He loves head rubs and laying on your lap. During his days off, he enjoys naps, puppachinos, paddle boarding, and bike rides sitting in his basket.


We are committed to providing your child with expert dental care using the latest technology in a positive, kid-friendly environment.

To ensure a relaxed and enjoyable dental experience for your child, we offer overhead TVs where children can choose their own movies as soon as they are seated.

Our office features
  • Strict COVID safety protocol

  • Kid-friendly doctors and staff

  • Hospital-grade sterilization system

  • Computerized, chartless recordkeeping

  • Most modern dental equipment available

  • State-of-the-art computerized X-ray system: digital system reduces radiation exposure by 90% and eliminates harmful processing chemicals


Not all pediatric dentists are the same! It is important to seek a pediatric dentist who is board certified by the American Board of Pediatric Dentistry.
Calabasas Pediatric Dentistry & Orthodontics

A board-certified pediatric dentist, or Diplomate, is a pediatric dentist demonstrating exceptional knowledge of and expertise in pediatric dentistry. Candidates for board certification must have their credentials verified by the American Board of Pediatric Dentistry and successfully complete a voluntary examination. Preparation for the certification examination can take upwards of 2 years or more. A pediatric dentist with this level of certification exhibits a drive and determination for excellence in the field of pediatric dental health and a commitment to staying current with the latest advances in the field.

Drs. Rumack and Harmer have attained their certification with the American Board of Pediatric Dentistry, which represents the highest possible credentials within the field of pediatric dentistry. Less than 38% of all pediatric specialists in the United States are board certified. When your child is in the care of a board-certified pediatric dentist, they are being treated by the best of the best!


  • Dr. Rumack is a wonderful pediatric dentist. I only wish she treated adults too, because I wouldn’t dread going to the dentist if it was to see her! My three children, ages 6, 10, and 12, have been going to Dr. Rumack for almost two years. She is by far the best dentist for children I have ever been to or could possibly imagine. My children don’t mind going to the dentist because the staff is wonderful, there are TVs with Netflix at every chair. The office is also ‘green’ and totally computerized. The Xray equipment is state-of-the-art low r...

    Stephanie C.
  • I have been taking my twin daughters to Dr. Rumack since they were 2 and they are now 7. Dr. Rumack is so gentle, sweet and very thorough in taking care if their dental hygiene. Over the years we have visited her quite a few times for different issues. And her compassion and making the girls feel comfortable is why we love her. Because she is a mother herself she understands how to approach kids and make them feel comfortable when either filling a cavity, pulling a tooth out or just simply cleaning their teeth. Her office is so beautiful ...

    Natalie B.
  • A quote from my 8 year old.... "Momma, Dr. Elena's office is better than going to the movies, they let me lay down & watch my favorite shows. I think I should go there once a week, like dance class, it will be good for me." Now what kid LOVES going to the dentist? One that is a patient at Calabasas Pediatric Dentistry, that's who! As a parent I will bend over backwards & drive miles away (as I do) to know that my daughter is getting the best treatment, in a caring atmosphere where the patient comes first. Dr. Elena Rumack is this & so muc...

    Apryll G.
  • As the mother of an autistic child, I understand the challenges families face in finding excellent dental care. When we came to Dr. Rumack, my son’s treatment plan was extensive and we were considering general anesthesia. That all changed after the initial visit. Dr. Rumack’s sensitivity and brilliant communication immediately put my son at ease. With her support, he was able to complete the entire treatment plan in two appointments with no general anesthesia. Now he looks forward to going to the dentist! This has made such a positive impact...

    Holly H.
  • I have only the best things to say about Dr. Elena and her whole staff. I have 3 children, and going to the dentist hasn't been a very positive experience for our family in the past, but Dr. Elena demonstrated amazing patience, warmth, dedication and professionalism. I could tell she treated my children the way she would want her own children to be treated. Dr. Elena has laid the foundation for a relationship that can only get better with time. I want all my children to grow into adulthood and not dread going to the dentist. Dr. Elena has se...

    MARA B.

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