About Us

Rejuva Medical Aesthetics offers the most advanced techniques in plastic surgery and non-invasive cosmetic treatments. Our objective is to meet and exceed all expectations so that when you walk through our doors, you know your experience will be second to none.


Kian Karimi, MD, FACS

Medical Director

Kian Karimi MD, FACS is a world-renowned facial plastic surgeon and head and neck surgeon, who is double board-certified by the American Board of Facial Plastic and Reconstructive Surgery and the American Board of Otolaryngology – Head & Neck Surgery. He is considered one of the nation’s top facial plastic surgeons and an innovator in advanced surgical and non-surgical treatments. He’s gained trust and built his reputation by serving individuals from all walks of life with the utmost care. Patients include A-list celebrities, high-profile executives and public figures, professional athletes, trauma victims, and young adults. Dr. Kian has been named a Castle Connolly Top Doctor for seven years in a row since 2017 and was featured in Modern Luxury Los Angeles in 2022 and 2023.

Recognized as a pioneer in non-invasive procedures, Dr. Kian personally trains surgeons across the nation on best practices of PDO thread techniques, microcannula filler injections, and the utilization of autologous blood plasma for aesthetic and reconstructive purposes.

Ultimately, Dr. Kian believes that the outcome of any consultation, surgical, or non-surgical procedure should be to enhance his patients’ physical and emotional quality of life. He spends adequate time advising his patients of their options in order to create an individualized plan.

Dr. Kian is fluent in Spanish and Farsi.
Dr Kian Karimi

Amit Kochhar, MD

Dr. Amit Kochhar, MD, is double board-certified in Otolaryngology, Head and Neck Surgery and Facial Plastic and Reconstructive Surgery. He is the director of the Facial Nerve Disorders Program at Pacific Eye, Ear & Skull Base Center, Pacific Neuroscience Institute, Providence Saint John’s Health Center in Santa Monica.

In addition to his clinical duties caring for patients, and teaching, he continues to perform research and present at national meetings. His training in facial plastic and reconstructive surgery has provided him with a diverse skill set that he can provide to each patient.

His patients appreciate his compassion, expertise and rare combination of aesthetic and reconstructive surgical skills. Dr. Kochhar believes that each patient has unique experiences and perspectives that shape their goals of treatment. Thus, he strives to learn about his patients in-depth and create a plan of care that meets each of their individual needs.

Dr. Kochhar has been recognized by several prestigious organizations and publications. For the last five years, since 2020, he has been recognized as a Castle Connolly Top Doctor and was featured in Modern Luxury Los Angeles in 2022 and 2023.




Dr. Amit Kochhar

Sharon Stewart, PA-C

Aesthetic Physician Associate
Laser and Injectables Specialist

Sharon Stewart, PA-C is a board-certified physician assistant with a Master’s of Science degree in Physician Assistant Studies from Western University of Health Sciences. Sharon has over 10 years of experience in both clinical and cosmetic dermatology and frequently attends medical and aesthetic CME lectures and conferences in order to perfect her craft and provide patients with the best quality of care. Her comprehensive knowledge of injectables, various lasers, and microneedling procedures enables her to customize treatment plans that help patients achieve great results in a natural-looking way. Sharon is most passionate about making her patients look and feel beautiful in their skin.

Sharon specialized in laser treatments and microneedling.

Sharon Stewart, PA

Cindy Peng, PA-C

Aesthetic Physician Associate
Laser and Injectables Specialist

Cindy Peng, PA-C is a skilled Physician Associate, specializing in cosmetic dermatology and aesthetics, but she is also Rejuva’s newest member to join the provider team. She holds a B.S. in Neuroscience from the University of Southern California and a master’s degree in Physician Assistant Studies from Rush University Medical Center. Cindy combines injectables and laser rejuvenation treatment modalities to provide natural and harmonious outcomes, emphasizing a comprehensive and individualized approach for each patient’s concerns and aesthetic goals.

rejuva cindy peng PA C los angeles ca

Lauren Pevnick, RN

Aesthetic Nurse
Laser and Injectables Specialist

Lauren is a Registered Nurse who graduated with honors as an RN from Mount St. Mary’s College. She is currently completing an aesthetic fellowship under Dr Karimi. Lauren’s aesthetic journey started in 2013, working alongside some of the top injectors in the aesthetic industry, which inspired her to pursue a career as an aesthetic nurse. Lauren’s knowledge of the aesthetic industry, passion for learning and dedication to perfecting her craft, enable her to create personalized treatments plans to help patients achieve their aesthetic goals.

Lauren specializes in facial aesthetics, injectables and lasers.

Sharon Stewart, PA

Sherry Gizewski

Practice Administrator 
Surgery Coordinator 

Sherry joined our practice in 2015 with an advanced degree in Health Care Administration from UCLA. She has 28 years of experience in healthcare and through her leadership and passion for the aesthetic industry, has played a significant role in the expansion and continued success of Rejuva Medical Aesthetics.

In addition to managing business operations, she is involved in all aspects of the practice including marketing, public relations, sales, and patient satisfaction.

Suzanne Natbony, Esq.
OUTSIDE General Counsel

Suzanne Natbony, Esq. is outside General Counsel, and a third-generation lawyer, licensed in California since 2009.  Suzanne has garnered transactional, regulatory/compliance, dispute resolution and litigation experience.  She has advised clients on a variety of business matters, including, structuring transactions, drafting and negotiating business and employment contracts, healthcare and FDA regulatory, privacy, due diligence, acquisitions, intellectual property, corporate governance, and resolving disputes. Further, Suzanne has gained a diverse background practicing law across multiple business sectors, including, healthcare, technology, real estate, cosmetics, medical devices, and entertainment.  Not only an experienced general practice business lawyer, as both in-house counsel and outside counsel in private practice, Suzanne also has experience with executive management and startup founding.
Suzanne graduated Magna Cum Laude with a B.A. in Political Science from the University of Southern California. She received her J.D. from Southwestern University School of Law with an emphasis in health law, where she was President of the Southwestern Law and Medicine Society.  Suzanne is passionate about healthy living and practicing healthcare law, having grown up with active and health-conscious parents and several doctors in her family.


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