Dr. Marco J. Tomassi

General Surgery | Colorectal Surgery
Kaiser Permanente
Kaiser Permanente Zion Medical Center
4647 Zion Avenue, 
San Diego, CA 
Accepting New Patients
Kaiser Permanente
Kaiser Permanente Zion Medical Center
4647 Zion Avenue, 
San Diego, CA 
OverviewInsuranceLocationsClinical ResearchSimilar Doctors

Overview

Marco Tomassi is a General Surgeon and a Colorectal Surgeon in San Diego, California. His top areas of expertise are Anal Cancer, Colorectal Cancer, Rectal Prolapse, Colorectal Polyps, and Hernia Surgery. Dr. Tomassi is currently accepting new patients.

His clinical research consists of co-authoring 10 peer reviewed articles. MediFind looks at clinical research from the past 15 years.

Specialties
General Surgery
Colorectal Surgery
Licenses
Surgery in CA
Languages Spoken
English
Gender
Male

Insurance

Accepted insurance can change. Please verify directly with the provider.

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Locations

Kaiser Permanente Zion Medical Center
4647 Zion Avenue, San Diego, CA 92120
Call: 619-528-5000

Clinical Research

Clinical research consists of overseeing clinical studies of patients undergoing new treatments and therapies, and publishing articles in peer reviewed medical journals. Providers who actively participate in clinical research are generally at the forefront of the fields and aware of the most up-to-date advances in treatments for their patients.

10 Total Publications

The Impact of the Shift in Clinical Management From Reactive to Preventative on the Rate of Bowel Resection in Inflammatory Bowel Disease Within a Large Health Care Organization.
The Impact of the Shift in Clinical Management From Reactive to Preventative on the Rate of Bowel Resection in Inflammatory Bowel Disease Within a Large Health Care Organization.
Journal: The American surgeon
Published: June 30, 2025
View All 10 Publications
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Areas of Expertise

MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.

Learn more about MediFind’s expert tiers

Find Dr. Tomassi's expertise for a condition
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        • Experienced
        • Anal Cancer
          Dr. Tomassi is
          Experienced
          . Learn about Anal Cancer.
          See more Anal Cancer experts
        • Colorectal Cancer
          Dr. Tomassi is
          Experienced
          . Learn about Colorectal Cancer.
          See more Colorectal Cancer experts
        • Colorectal Polyps
          Dr. Tomassi is
          Experienced
          . Learn about Colorectal Polyps.
          See more Colorectal Polyps experts
        • Hernia Surgery
          Dr. Tomassi is
          Experienced
          . Learn about Hernia Surgery.
          See more Hernia Surgery experts
        • Rectal Prolapse
          Dr. Tomassi is
          Experienced
          . Learn about Rectal Prolapse.
          See more Rectal Prolapse experts
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