Our Dermatologists

Michael J Dans, MD, PhD Michael J Dans, MD, PhD

Dr. Dans is a board certified dermatologist who enjoys practicing medical, surgical and cosmetic dermatology. Dr. Dans is on staff at California Pacific Medical Center and also serves as a clinical instructor of dermatology at UCSF.

Dr. Dans attended UC Davis and received a B.S. in biochemistry before obtaining a combined MD/PhD at New York University School of Medicine. He then completed a dermatology residency at the Hospital of the University of Pennsylvania before moving back to Northern California. Dr. Dans has published numerous scientific and medical articles and book chapters related to skin disease and treatment. Outside of the office, Dr. Dans enjoys skiing, hiking, and mountain biking with his family.

Mark Reisman, MD Mark Reisman, MD

Dr. Reisman has been working part time at San Francisco Dermatology since 2016, after retiring from Kaiser in Oakland. He also teaches dermatology to UCSF medical students and residents. He has many years of experience in all aspects of general dermatology. Dr. Reisman is board certified by the American Board of Dermatology.  In his free time, Dr. Reisman enjoys traveling with family and friends.


Medical Dermatology Evaluation and treatment of complicated and uncomplicated conditions of skin, hair and nails. Common conditions include acne, skin cancer, abnormal or symptomatic moles and other growths, psoriasis, eczema, rosacea, seborrhea, warts, discolorations, hair loss, skin infections (viral, bacterial, fungal). Surgical Dermatology Removal of cysts, lipomas, skin cancers, and bothersome skin growths. Cosmetic Dermatology Dr. Dans performs the latest in cosmetic dermatology treatments, including Botox, Dysport and fillers (such as Juvederm, Restylane and Voluma) to reduce facial wrinkles, laser treatments for facial redness/veins and age spots, sclerotherapy for leg veins, and chemical peels for facial skin rejuvenation. Please schedule an appointment, call our office or email us through our portal for more information.


490 Post Street, Suite 320, San Francisco, California 94102
Phone (415) 781-1932 • Fax (415) 781-1947

We are conveniently located in the 490 Post Street medical building, which is on the corner of Post and Mason Street and is one block from Union Square in downtown San Francisco. The main entrance to the building is on Post Street between Mason and Powell.

Parking Options:

  • Our building has valet parking.  The entrance is on Mason Street, between Post and Sutter. The rate is about $15 per hour.  
  • The Union Square garage is one block from our building.  Enter on Post between Powell and Stockton.  The rate is about $3 per hour.  
  • We also recommend a lot one block west of our office, on Taylor between Post and Sutter.  The rate is about $5 per hour.  To enter this lot, take Post St., turn left on Taylor and make an immediate left turn into the lot in an alley called Cosmo Pl. There are signs on the corner of Post and Taylor that direct you to the lot.
  • There are also various other lots within a few blocks of our office, including the Sutter-Stockton garage, which is generally the least expensive.

Public Transportation Options:
The office is easily accessible by public transportation, such as BART (bart.gov), bus, cable car and light rail (sfmta.com). From BART, exit at Powell Street, walk up Powell toward Union Square, turn left on Post Street, and the entrance to the building will be on your right hand side toward the end of the block.

Insurance Plans

We take Medicare and most major private group PPO insurance plans that are offered through employers (we are not in network with individual PPO plans).  

We take HMO plans that are part of Brown and Toland or Hill Physician medical groups, but please make sure you have a valid referral from your primary care physician.

Please contact our office or your insurance provider to see if we are in network with your particular insurance plan before making an appointment.

Dermatology Resources

American Academy of Dermatology Public Resource Center

DermNet Patient Information

How to perform a self skin exam

Melanoma Detection (The ABCD's)

Terms of Use DO NOT attempt to access emergency care through this web site. If you think you have a medical emergency, CALL 911 IMMEDIATELY or go to the nearest hospital. This site contains links to other web sites and Dr. Dans has no control over the content or the availability of these sites, and is not responsible for the privacy practices or the content of such Web sites. These web links are provided as an educational tool only, and should not be relied upon for personal diagnosis or treatment. A link or reference to a web site should not be construed as an endorsement of the site or its contents. Any medical content that you feel may be important to your health should always be discussed with your physician.

490 Post Street, Suite 320, San Francisco, California 94102  •   Phone (415) 781-1932 • Fax (415) 781-1947

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Our Dermatologists
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