Dermatopathologists (Pathology) in California
Data updated monthly · Last refresh October 2026
47 Dermatopathology (Pathology) providers practice in California, including 1 (2%) offering telehealth. The largest concentration is in Los Angeles. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.
47providers
1telehealth
Los Angelestop city
Dermatopathology (Pathology) by city in California
Choose a city to see providers there.
Where Dermatopathologists (Pathology) in California practice
From CMS Medicare enrollment records covering 31 of the 47 providers listed here (66%). Providers who do not bill Medicare are not included in these figures.
29%solo or small practice (under 10 clinicians)
29%mid-size group (10 to 99)
42%large group or health system (100+)
Largest practice groups
| Group (as registered with Medicare) | Dermatopathologists (Pathology) | All clinicians in group | Main city |
| Newport Harbor Pathology Medical Group Inc. | 5 | 27 | Newport Beach |
| Southern California Permanente Medical Group | 2 | 11,250 | Fontana |
| Golden State Dermatology Associates, Inc.. | 2 | 118 | Walnut Creek |
| Csi Medical Group | 2 | 104 | San Francisco |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Dermatopathologists (Pathology) affiliated |
| Sutter Medical Center, Sacramento | Sacramento | Nonprofit | 4 of 5 | 2 |
| Kaiser Foundation Hospital Fontana/Ontario | Fontana | Nonprofit | 3 of 5 | 2 |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
Dermatopathology (Pathology) providers in California
Listed by city, largest first. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.
Dr. Reggie Zhan, M.D.Carmichael, CA · No drug or device payments recorded (2025) ·
(916) 863-1496 Dr. Victoria Vaughan, M.D.Chico, CA · No drug or device payments recorded (2025) ·
(530) 891-6244 Dr. Stevan KnezevichClovis, CA · No drug or device payments recorded (2025) ·
(559) 326-2800 Dr. Gary Oliver, MDDaly City, CA · $121 in drug and device payments (2025) ·
(650) 994-3238 Dr. Matthew Hedberg, MD, PHDDuarte, CA · No drug or device payments recorded (2025) ·
(800) 826-4673 Dr. Brian Roehmholdt, M.D., PH.D.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 427-5000 Dr. Matthew Muenster, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 216-0078 Dr. Takako Mitsuhashi, M.D.,PH.D.Irvine, CA · No drug or device payments recorded (2025) ·
(949) 265-1782 Dr. Christopher Vanley, M.D.Laguna Beach, CA · No drug or device payments recorded (2025) ·
(949) 499-7181 Dr. Joseph Hillman, M.D.Laguna Beach, CA · No drug or device payments recorded (2025) ·
(949) 499-7288 Dr. Lawrence Machtinger, M.D.Laguna Beach, CA · No drug or device payments recorded (2025) ·
(949) 499-7288 Dr. Raelynn Tucker, M.D.Laguna Beach, CA · No drug or device payments recorded (2025) ·
(949) 499-7288 Dr. Raul Delrosario, M.D.Laguna Beach, CA · No drug or device payments recorded (2025) ·
(949) 499-7288 Dr. Ronald Barr, M.D.Laguna Beach, CA · No drug or device payments recorded (2025) ·
(949) 499-7288 Dr. Roupen Yaghsezian, MDLaguna Niguel, CA · No drug or device payments recorded (2025) ·
(951) 280-0100 Dr. Cora Humberson, MDLa Jolla, CA · $149 in drug and device payments (2025) ·
(858) 554-9100 Dr. Justin Kerstetter, M.D.Loma Linda, CA · No drug or device payments recorded (2025) ·
(909) 558-4000 Dr. Emma Taylor, MDLos Angeles, CA · $828 in drug and device payments (2025) ·
(310) 825-5420 Dr. Gregory Gates, D.O.Los Angeles, CA · No drug or device payments recorded (2025) ·
(310) 267-3561 Dr. Honggang Shen, M.D.Los Angeles, CA · $299 in drug and device payments (2025) ·
(310) 689-1815 Dr. Joshua Mo, MDLos Angeles, CA · $811 in drug and device payments (2025) ·
(314) 803-3291 Dr. Kittane Ranganath, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 268-3091 Dr. Laura Westerling, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(310) 794-7953 Dr. Lyndon Su, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(818) 689-1808 Dr. Nima Amini, M.D.Los Angeles, CA · No drug or device payments recorded (2025) ·
(310) 268-7707 Dr. Sharona Yashar, MDLos Angeles, CA · No drug or device payments recorded (2025) ·
(310) 206-6594 Dr. Stacey Pun, MDLos Angeles, CA · $1,329 in drug and device payments (2025) · Telehealth ·
(213) 278-0021 Dr. Salma Dabiri, M.D.Los Gatos, CA · No drug or device payments recorded (2025) ·
(408) 866-5227 Dr. Julie Duquette, M.D.Newport Beach, CA · No drug or device payments recorded (2025) ·
(949) 515-3462 Dr. Julian Garcia, MDPalmdale, CA · $158 in drug and device payments (2025) ·
(661) 947-9000 Dr. Frank Luo, MDPasadena, CA · No drug or device payments recorded (2025) ·
(626) 589-8525 Dr. Khanh Tran, M.D.San Diego, CA · No drug or device payments recorded (2025) ·
(858) 499-2600 Dr. Philip Leboit, M.D.San Francisco, CA · $136 in drug and device payments (2025) ·
(415) 353-7546 Dr. Thaddeus Mully, M.D.San Francisco, CA · No drug or device payments recorded (2025) ·
(415) 476-1000 Dr. Michelle Hure, M.D.San Juan Capistrano, CA · $3,523 in drug and device payments (2025) ·
(959) 359-6400 Dr. Hugh Byers, M.D.San Luis Obispo, CA · No drug or device payments recorded (2025) ·
(805) 541-6033 Dr. Masoud Asgari, M.D.San Ramon, CA · No drug or device payments recorded (2025) ·
(209) 577-1200 Dr. Jochen Schaefer, M.DSanta Monica, CA · No drug or device payments recorded (2025) ·
(310) 828-0011 Dr. Changgao Yang, MDSeal Beach, CA · No drug or device payments recorded (2025) ·
(562) 799-8900 Dr. Belinda Tan, MDTorrance, CA · $50 in drug and device payments (2025) ·
(310) 222-6510 Dr. Emily Green, MDWalnut Creek, CA · $61 in drug and device payments (2025) ·
(925) 278-7592 Dr. Timothy Mccalmont, M.D.Walnut Creek, CA · $82 in drug and device payments (2025) ·
(925) 278-7592 Dr. Alex Ngo, M.D.West Hills, CA · No drug or device payments recorded (2025) ·
(818) 737-6119 Dr. Brenda Javier, MDWest Hills, CA · No drug or device payments recorded (2025) ·
(818) 737-6000 Dr. Linda Shi, MD, PHDWest Hills, CA · No drug or device payments recorded (2025) ·
(818) 737-6148 Dr. Oliver Stanton, M.D.Woodland, CA · No drug or device payments recorded (2025) ·
(916) 634-7767 Common questions
How many Dermatopathology (Pathology) providers are in California?There are 47 Dermatopathology (Pathology) providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.
Do Dermatopathology (Pathology) providers in California offer telehealth?Yes. 1 of the 47 Dermatopathology (Pathology) providers in California (about 2%) report offering telehealth services in CMS data.
Which cities in California have the most Dermatopathology (Pathology) providers?Los Angeles (10), Laguna Beach (6), West Hills (3) have the highest concentration of Dermatopathology (Pathology) providers in California.
How many Dermatopathology (Pathology) providers in California received drug or device company payments?13 of 47 Dermatopathology (Pathology) providers in California (28%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
Where does this data come from?Provider counts and profiles come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.
Do most Dermatopathologists (Pathology) in California work in independent practices or large health systems?Among 31 Dermatopathologists (Pathology) in California enrolled in Medicare, 29% bill through a solo or small practice with fewer than 10 clinicians, 29% through a mid-size group of 10 to 99, and 42% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Dermatopathologists (Pathology) in California work at?According to CMS facility affiliation records, the California hospitals where the most Dermatopathologists (Pathology) hold privileges are Sutter Medical Center, Sacramento in Sacramento; Kaiser Foundation Hospital Fontana/Ontario in Fontana.
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