Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. GERALD ALAN GELLIN MD
NPI 1407827405
Dermatology in San Francisco, CA

Active since January 28, 2006
3838 CALIFORNIA ST, SUITE 805, SAN FRANCISCO, CA 94118(415) 668-2400(415) 668-6940 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

About Dr. Gerald Alan Gellin Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GERALD ALAN GELLIN MD (NPI 1407827405) is an individual dermatology provider in San Francisco, California, licensed in California (C20774) and active in the NPI registry since January 2006.

NPPES Registry Identity

NPI1407827405
Entity TypeIndividualMale
Primary Taxonomy207N00000X
Provider Legal NameDR. GERALD ALAN GELLINCredential: MD
Location Address3838 CALIFORNIA ST, SUITE 805San Francisco, CA 94118-1522
Mailing Address3838 California St, Po Box 27404 / Suite 805San Francisco, CA 94118-1522 · (415) 668-2400 · Fax (415) 668-6940
Fax(415) 668-6940
Sole ProprietorNo
Enumeration DateJanuary 28, 2006
Last NPPES UpdateJuly 13, 2026
NPI 1407827405 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians
Taxonomy Code207N00000X
License Licensed in CA · C20774
Definition
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
3838 CALIFORNIA ST, San Francisco, CA 94118

Other Identifiers 2

Other00C207740CA · Blue Shield
Other00C207740CA · United Healthcare

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Obstetrics & Gynecology (Gynecology)
3838 CALIFORNIA ST, SUITE 316
SAN FRANCISCO, CA 94118
Internal Medicine (Hematology & Oncology)
3838 CALIFORNIA ST, SUITE 707
SAN FRANCISCO, CA 94118
Colon & Rectal Surgery
3838 CALIFORNIA ST, RM 616
SAN FRANCISCO, CA 94118
Internal Medicine
3838 CALIFORNIA ST, SUITE 608
SAN FRANCISCO, CA 94118
Otolaryngology
3838 CALIFORNIA ST, SUITE 505
SAN FRANCISCO, CA 94118
Orthopaedic Surgery
3838 CALIFORNIA ST, SUITE 715
SAN FRANCISCO, CA 94118
Orthopaedic Surgery
3838 CALIFORNIA ST, SUITE 715
SAN FRANCISCO, CA 94118
Specialist
3838 CALIFORNIA ST, SUITE 707
SAN FRANCISCO, CA 94118

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gerald Gellin's NPI number?

The NPI number for Gerald Gellin is 1407827405. It was assigned to this individual provider in the NPPES registry on January 28, 2006.

Where is Gerald Gellin located?

Gerald Gellin practices at 3838 California St Suite 805, San Francisco, CA 94118. The listed phone number is (415) 668-2400.

What is Gerald Gellin's specialty?

The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.

When was this NPI record last updated?

The NPPES record for Gerald Gellin was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 54 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.