Our Practice

Our Practice

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.

Our Team

Dr. Kian Karimi is double-board certified by the American Board of Facial Plastic and Reconstructive Surgery and the American Board of Otolaryngology. Together with his team of aesthetic experts, they combine exceptional skills, extensive experience, and the latest technology to deliver the most natural and beautiful results possible for their patients.

Additionally, the staff at Rejuva Medical Aesthetics works with the physicians in performing the most advanced minimally and non-invasive cosmetic techniques as well as plastic surgery to help patients look and feel younger. Starting with the consultation, they work closely with patients to develop and implement a customized care plan to achieve a desired look. Their goal is to provide the best services possible in a calm and relaxed environment.

Kian Karimi, MD, FACS

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.

Dr. Kian maintains a thriving medical practice in Los Angeles that focuses on advanced facial plastic and reconstructive surgery, head and neck surgery, and endonasal skull base surgery as well as non-invasive procedures. 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.

Natalia Guzman, BSN, RN, CANS

Natalia Guzman BSN, RN, CANS. is a highly skilled Los Angeles-based Cosmetic Nurse Injector with over 10 years of experience. She has trained and worked along-side some of the most accomplished cosmetic surgeons in the world and comes to Rejuva Medical Aesthetics with a wealth of knowledge and expertise. Natalia believes the consultation and pre-treatment discussion is key to developing a personalized plan that allows both her and her patient to be fully invested in their care from beginning to end.

Natalia focuses on providing each patient the ultimate combination of incredible skill, offering the latest techniques, and her innate artistry creating natural and youthful outcomes.

Natalia specializes in Sculptra and PDO Threads.


Sharon Stewart, PA-C

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.

Christine Partamian, NP

Christine is a Registered Nurse with an RN from Mount St. Mary’s College. She is currently completing her NP from Azusa Pacific University with plans to take her board exam in 2021. Christine has a nursing background in Emergency and Plastic Surgery which allows her to combine her medical knowledge with her creative artistic side. Her goal for each patient is to achieve natural-looking enhancements that allow them to feel and look more beautiful.

With every treatment, Christine takes her time to make patients feel comfortable while assessing their needs so that she can deliver the most personalized treatments every time.

Christine specializes in microneedling and injectables.

Sherry Gizewski

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.

What Our Patients Say