South Bay's BEST 2009 - Daily Breeze
Voted Best Dermatologist in the
South Bay by the Daily Breeze
Our Staff
The Coast Dermatology Doctors are trained in the newest and most advanced medical and surgical techniques and are at the cutting edge of cosmetic dermatology, laser, vein and cosmetic surgery.
Board Certified Dermatologist
Dr. Mark Horowitz
Dr. Mark Horowitz practices medicine at Coast Dermatology Medical Associates. After completing his training at Michigan State University over 10 years ago, he has mastered some of the most advanced techniques available in dermatology and cosmetic surgery today. Dr. Mark Horowitz is an expert in general and surgical dermatology. He has advanced skills in skin cancer detection and Mohs micrographic surgery to treat large and difficult tumors of the skin. He also specializes in cosmetic laser treatments to improve the signs of aging and wrinkling of the skin.

Besides his advanced surgical training, he has developed a special interest in chronic rashes that result from allergic reactions. He has developed a patch test center which can detect offending chemicals in your environment that may be producing the rash. Our office is one of the few medical practices offering this advanced service in southern California.

Dr. Mark Horowitz is an active professor of Dermatology. He is the assistant director of the Western University/Pacific Hospital Dermatology residency program, and he was active in teaching resident physicians at UCLA Harbor Hospital. Dr. Mark Horowitz has published multiple articles in prestigious medical journals. He has been asked to be a speaker for many pharmaceutical companies and has conducted clinical trials on new and innovative medications.
Board Certified Dermatologist
Dr. Michael Kassardjian
Dr. Michael Kassardjian is a Board Certified Dermatologist and South Bay native. Dr. Kassardjian joined the practice in 2011 and specializes in medical, surgical and cosmetic dermatology. Prior to joining Coast Dermatology, Dr. Kassardjian was involved in various medical research projects and dermatologic publications. While earning his bachelor's degree at Claremont McKenna College, Dr. Kassardjian acquired international research experience at Pasteur Institute in Paris, France and was also engaged in an extensive study at Harbor UCLA focusing on infectious dermatologic diseases in HIV patients. While in medical school at Touro University, Dr. Kassardjian's strong interest in dermatology and dermatologic surgery evolved, and he participated in research in Mohs micrographic surgery and the use of confocal microscopy at Loma Linda University.

Dr. Kassardjian graduated among the top of his medical school class, earning Dean's List and numerous academic merits during his academic study. After completing his internship training at Pacific Hospital in Long Beach, California, Dr. Kassardjian served as Chief Resident of Dermatology at Western University. He is a published author in several prestigious dermatologic journals and serves as Clinical Faculty to Western University. Dr. Kassardjian is a supporter of humanitarian causes and has personally traveled extensively to various parts of the world on medical missions to provide aid to individuals who do not have access to healthcare. He is passionate in the advocacy for early detection of skin cancer and treatment. He is dedicated to the importance of maintaining and improving healthy skin, and utilizes various techniques ranging from injectables, peels and cosmetics to meet his patients needs.

Dr. Kassardjian is a fellow of the American Academy of Dermatology, American Society of Dermatologic Surgery, and member of the American Society for Mohs Surgery.

Dr. Kassardjian loves practicing dermatology and welcomes his native community of the South Bay to visit for any medical, surgical or cosmetic needs. He is always striving for each patient to have a great experience.
Board Certified Dermatologist
Dr. Matthew Koehler
Dr. Matthew Koehler joined Coast Dermatology in 2012 and specializes in skin cancer and complex medical dermatology. Having initially trained in Family Medicine, he has a well-rounded and comprehensive approach to his care. He enjoys taking care of all ages and ailments, ranging from acne to skin cancer.

Originally from Minneapolis, he graduated from the University of Minnesota with a Bachelor of Science in Biology. Dr. Koehler then attended medical school at Touro University, College of Osteopathic Medicine in Vallejo, California where he graduated with honors in the top 2% of his class. After medical school, Dr. Koehler served as a general practitioner in the United States Navy: for four years he provided primary care and oversaw a desert survival program. When his naval service was fulfilled, he went on to complete a Dermatology residency at Western University of Health Sciences where he served as Chief Resident.

Dr. Koehler is intrigued by unusual medical cases and has published numerous cases in Dermatologic Surgery, Pediatric Dermatology, as well as other dermatological journals. He also has a passion for teaching and earned the "Golden Apple" teaching award from Western University, where he continues to serve as an Associate Professor.

Dr. Koehler is a fellow of the American Academy of Dermatology, American Osteopathic College of Dermatology and a member of American Society of Dermatologic Surgery.

Dr. Koehler is dedicated to educating and helping his patients prevent and treat skin conditions of all kinds. Well versed in medical and surgical dermatology, including Mohs micrographic surgery and laser therapies, he is dedicated to providing excellent, individualized care for his patients.
Coast Dermatology Medical Associates
Holly is a Nurse Practitioner at Coast Dermatology Medical Associates. She is from Canyon Lake, Texas and received her first nursing degree from the University of Texas, Medical Branch. Holly began her nursing career in the Neonatal ICU in Austin, Texas, and then traveled around the US as a travel nurse in the Neonatal ICU. Eventually she landed at Children's Hospital Los Angeles, and decided Los Angeles was a tolerable place to live, but a sunset stroll one evening in Hermosa Beach changed her life. Holly soon made Hermosa Beach her home. After a few months of living in the South Bay she returned to school at California State University, Long Beach where she attained her master's degree in nursing, as well a certification as an Adult Nurse Practitioner.

Holly's earliest friend in Los Angeles was a wonderful dermatologist, who introduced her to dermatology, and also trained her for an exciting new career. After graduating with her Nurse Practitioner degree, Holly began working in private practice in Beverly Hills and Santa Monica, California. The experience gained at this internationally renowned medical and cosmetic practice helped to develop Holly's expertise in medical as well as cosmetic dermatology. She further refined her skills in cosmetic dermatology, focusing specifically on Botox and fillers. She joined Coast Dermatology Medical Associates in May of 2015. Holly found her perfect fit at Coast Dermatology where she now assimilates her artistic cosmetic practice with her true passion for medical dermatology. The ultimate testament to her skill and charisma is that many of her loyal patients have followed her from all throughout Los Angeles, and now visit her in Torrance.

Holly now practices medical dermatology, and also continues to expand her cosmetic following. Visit her for full body skin exams, acne, eczema, psoriasis, rashes, and all other medical dermatology conditions. She is happy to give you a comprehensive skincare regimen and cosmetic consultation as well!
Cosmetic Laser Specialist
Marty Knott, M.S.N., R.N.
Marty is a graduate of the University of Iowa and UCLA. She was self-employed as a nurse practitioner in "Physical and Vocational Rehabilitation" for 10 years. During that time, she developed an interest in the cosmetic specialty of medicine.

Many of her patients required reconstructive surgery following catastrophic injuries. She understood the importance of having an acceptable physical appearance, and became knowledgeable in the fields of prosthesis as well as Botox, Collagen, and laser hair procedures. Her education then evolved into a hands-on approach using lasers. She has continued to grow in her knowledge of lasers while employed at Coast Dermatology.
Medical Aesthetician
Leah Roscoe
Leah is a licensed esthetician who specializes in skin care. Leah is trained to recognize and treat skin conditions including fine lines, dehydration, acne, uneven skin tone, and more. Leah uses specialized products and techniques to maintain and improve the patients' appearance. She continues to pursue her education in order to stay current with the most up to date products and procedures.