Our Mission

Dermatology Consultants of Marin is a multi-provider practice specializing in medical, pediatric, surgical and cosmetic Dermatology. Our providers are all Board Certified and considered Best in Marin by their peers.

Our practice has served Marin County since 2001, first in Greenbrae, and now in San Rafael. Our mission at Dermatology Consultants of Marin is to provide the highest level of service in the diagnosis and treatment of dermatologic diseases and skin cancers. We often work as a team to give our patients the best care possible, collaborating as needed to provide comprehensive solutions to our patients’ skin problems. In addition, we have close ties to the University of California, San Francisco.

We love our work and highly value our patients, thereby developing lasting relationships, all of which enhance the patient experience at Dermatology Consultants of Marin.

Our Medical Staff

Amy Kobalter, M.D.

Dr. Amy Kobalter grew up in upstate New York and graduated from Stanford University with distinction with a degree in Biological Sciences.  At Stanford, she was elected to the Phi Beta Kappa Honors society in her junior year.  She received her medical degree at the University of California, San Diego, where she was an ARCS (Achievement Rewards for College Scholars) scholarship recipient.

Dr. Kobalter completed her internship in Internal Medicine at the University of California, San Francisco Mt. Zion campus and studied dermatology at the University of California, Davis, where she was the Chief Resident in her third year.

Upon completion of her Dermatology residency, Dr. Kobalter started her practice in Marin as a solo practitioner in Greenbrae.  She also worked in the Dermatology Department at the Veterans Administration Medical Center in Martinez.  In 2001, Dr. Kobalter and Dr. Jodi Grossfeld founded Dermatology Consultants of Marin, and ultimately moved their practice to 5000 Civic Center Drive in San Rafael. They practiced together and with their colleagues until Dr. Grossfeld moved out of state in 2016.

Dr. Kobalter’s practice focuses on Medical Dermatology.  She treats patients of all ages for all medical issues of the skin including skin cancer and skin cancer surgery.  She is thrilled to be a part of Dermatology Consultants of Marin, where patients receive the best dermatologic care in a warm and supportive environment.

Dr. Kobalter is consistently awarded Marin’s Top Doctor Award.  She lives in Marin with her family.


Ravinder S. Gogia, M.D.

Dr. Ravi Gogia is a board-certified dermatologist and a fellowship-trained Mohs surgeon. Born and raised in California, he graduated with distinction from Stanford University and was elected to the Phi Beta Kappa honors society. He received his medical degree at the University of California, San Francisco (UCSF) and earned Alpha Omega Alpha honors. After completing his internship in internal medicine at the Harvard-affiliated Brigham and Women’s Hospital in Boston, he returned to UCSF for dermatology residency. More recently, he completed the prestigious Procedural Dermatology/Mohs Surgery fellowship at UCSF.

Dr. Gogia specializes in skin cancer surgery and Mohs surgery, the surgical technique that provides the highest cure rates for skin cancers with the best cosmetic outcomes. Additionally, he enjoys general medical dermatology and has extensive fellowship training in laser surgery and cosmetic treatments such as Botox and fillers.

He is a fellow of the American Academy of Dermatology and a member of the American Society for Dermatologic Surgery (ASDS).

In his free time, Dr. Gogia likes to travel and is active outdoors. He currently lives in Marin with his family.


Renee Howard, M.D.

Dr. Renee Howard was born at Marin General Hospital and grew up in Tiburon and San Anselmo. She attended local schools including Saint Anselms and Sir Francis Drake High School. She graduated summa cum laude with a B.S. in Biochemistry from UC Davis, then obtained her M.D. from University of California, San Francisco (U.C.S.F.).

Dr. Howard completed pediatric residency at Children’s Hospital Oakland, then practiced general pediatrics in San Francisco and Marin for four years with Doctors Piel, Patton, Aicardi, Gonda and Ernster. Seeing so many children with skin problems in pediatric practice sparked her interest in Dermatology. In 1992 she returned to UCSF for Dermatology residency. After her dermatology training, she was the Chief of Pediatric Dermatology at Children’s Hospital Oakland for four years.

Dr. Howard joined Dr. Kobalter in 1999 and spent many years splitting time between Marin and UCSF, where she continued to teach residents and attend Pediatric Dermatology clinics. In 2016, she became the Chief of Pediatric Dermatology at UCSF Benioff Children’s Hospital Oakland and UCSF Professor of Dermatology. Dermatology Consultants of Marin is fortunate that Dr. Howard is still able to see patients in our clinic one day a week. Her experience and expertise is appreciated by her patients and the local physicians who refer their patients to her.
Dr. Howard lives in Marin with her family.


Matthew Koehler, D.O.

Dr. Matthew Koehler grew up in Minneapolis and graduated from the University of Minnesota with a Bachelor of Science in Biology. He attended medical school at Touro University, where he graduated with honors in the top 2% of his class. After a medical internship, Dr. Koehler spent four years serving as a medical officer in the United States Navy. There he provided primary care medicine and oversaw a desert survival program for elite military personnel. Dr. Koehler then went on to complete a Dermatology residency at Western University of Health Sciences in Los Angeles, where he served as Chief Resident.

Having started his career in primary care, Dr. Koehler has a well-rounded and comprehensive approach to patient care. Dr. Koehler is committed to educating and helping his patients prevent and treat skin conditions of all kinds. He also has extensive training and experience in surgical and cosmetic dermatology. He is board certified by the American Board of Dermatology, a fellow of the American Academy of Dermatology, American Osteopathic College of Dermatology, and a member of American Society of Dermatologic Surgery. He has also been an Associate Professor for the residency program at Western University.

Dr. Matthew Koehler leaves a busy practice in Los Angeles, where he will be missed by his colleagues and patients. He joined Dermatology Consultants of Marin in July 2017, after moving to Marin to be closer to his family. Dermatology Consultants of Marin is fortunate to have him.


Elizabeth Zettersten, M.D., F.A.A.D.

Dr. Elizabeth Zettersten is a Board-Certified Dermatologist and Fellowship-trained Cutaneous Oncologist. She worked several years at the Melanoma Center at the UCSF Comprehensive Cancer Center where she specialized in malignant melanoma and in cutaneous T-cell lymphoma.

Dr. Zettersten’s accomplishments also include dermatological basic science research which she performed at the San Francisco VA Medical Center’s laboratories, as well as clinical research at the UCSF Melanoma Center and the Lawrence Livermore National Laboratory.

She is the lead author of numerous scientific articles published in scholarly journals, such as the Journal of the American Academy of Dermatology and the Journal of Investigative Dermatology.

In 1997 she was awarded the prestigious Dermatology Foundation Research Award.

Originally from Sweden, Dr. Zettersten pursued her Bachelor in Medical Sciences at the University of Bonn, Germany, and her Medical Degree at the University of Copenhagen, Denmark, where she also completed a European Internship.

After successfully passing the United States Medical Licensing Examinations, she completed a U.S. Internship in Medicine at the University of Arizona College of Medicine, Phoenix, Arizona, and was thereafter selected as a Resident at the Department of Dermatology at the University of California, San Francisco.

Dr. Zettersten is very enthusiastic about joining the team at the Dermatology Consultants of Marin, providing highly professional medical, cosmetic and surgical dermatology to the community.

In her spare time, Dr. Zettersten enjoys spending time with her family and young son in Marin. She is also an avid student of languages, currently mastering four languages fluently – working on her fifth.

Our Qualifications and Associations

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