Dr. William Warren Kwan, MD

Dr. Kwan practices at Southern Marin Dermatology, Inc. in Sausalito, California.

Dr. Kwan's NPI, 1376504407, was assigned on March 29, 2006. Dr. Kwan graduated from Keck School of Medicine of USC in 1990. Dr. Kwan holds California license G73605.

Dr. Kwan's primary practice is Southern Marin Dermatology, Inc., at 2330 Marinship Way, Sausalito, CA 94965 in Marin County. The practice phone is (415) 887-9758.

Dr. Kwan's primary practice is Southern Marin Dermatology, Inc. in Sausalito, California. The medical group on file is Golden State Dermatology. Dmand AI also links Dr. Kwan to 1 more physician office, 1 group practice or clinic, 1 ambulatory surgery center and 1 medical group, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kwan practices, 3 sites in all. Vendor and product names are available with a free account.

Dermatology is Dr. Kwan's primary specialty in the NPI Registry, under taxonomy code 207N00000X. Dr. Kwan is board certified in dermatology by the American Board of Dermatology. Dmand AI has Dr. Kwan's licenses on file in 2 states: California and New York.

Dmand AI lists benign or precancerous skin growths, facial skin infection, scalp rash, skin cyst and skin discoloration among the conditions Dr. Kwan treats.

CMS data shows 12 Medicare services from Dr. Kwan across 1 procedure code in 2023, all of them office visits. Medicare paid $626 for them. Every service was in an office.

Across all payers, Dmand AI patient panel data puts Dr. Kwan's median patient age at 49, with 44% women.

In 2024, Dr. Kwan wrote 13 Medicare Part D claims. 100% of them were for generic drugs. They cover 4 drugs, with $1,428 in total drug cost. In 2021, CMS named 62 claims across 5 drugs.

Dr. Kwan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Kwan as offering telehealth. CMS counts 1,105 procedures of removal of skin lesions by Dr. Kwan, more than 94% of the clinicians it reports for that procedure.

Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 1 paper to Dr. Kwan. Dr. Kwan's most frequent co-authors are Valerie Dawn Callender, MD, Mona A. Gohara, MD and Corey Louis Hartman, MD.

CMS Open Payments shows 836 general payments to Dr. Kwan from 38 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 75% of the total. Galderma Laboratories, L.P. paid the most, $170,984.

Dr. Kwan graduated from Keck School of Medicine of USC in 1990.

Dr. Kwan is in network with 5 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.