Dr. Marco James Tomassi, MD
- Part D claims, 2024
- 177
- Hospital affiliations
- 1
- Industry payments
- $1,455
- Medical group
- 1
- Insurance carriers
- 2
- Practice address
- 4647 Zion Ave, San Diego, CA 92120
- Practice phone
- Call (619) 528-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Tomassi's professional email, personal email and mobile number
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Dr. Marco James Tomassi is a general surgeon in San Diego, California
Dr. Tomassi practices at Kaiser Permanente Zion Medical Center in San Diego, California, part of Kaiser Permanente.
Dr. Tomassi's NPI, 1710144829, was assigned on May 18, 2008. Dr. Tomassi graduated from New York Medical College in 2003. Dr. Tomassi's California license number on file is A103631.
- NPI
- 1710144829NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2860541455
- NPI enumeration date
- May 18, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (619) 528-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marco James Tomassi practices at Kaiser Permanente Zion Medical Center in San Diego, California
Dr. Tomassi's primary practice is Kaiser Permanente Zion Medical Center, at 4647 Zion Ave, San Diego, CA 92120 in San Diego County. The practice phone is (619) 528-5000.
- Kaiser Permanente Zion Medical Center4647 Zion Ave, San Diego, CA 92120 · San Diego CountyPhone(619) 528-5000
Source: Dmand AI Affiliation Data
Dr. Marco James Tomassi is affiliated with 2 sites of care and 1 medical group
Dr. Tomassi's primary practice is Kaiser Permanente Zion Medical Center in San Diego, California, part of Kaiser Permanente. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Tomassi to 1 more other site, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Marco James Tomassi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tomassi practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Permanente Zion Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Marco James Tomassi is one of 2,926 general surgeons in California
Surgery is Dr. Tomassi's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Tomassi is board certified in colon & rectal surgery by the American Board of Colon and Rectal Surgery. Dmand AI has Dr. Tomassi's licenses on file in 2 states: California and Virginia.
Specialties and state licenses
- Surgery, CaliforniaPrimary
- Virginia license
General surgeons near Dr. Tomassi
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Marco James Tomassi's patients have a median age of 67
Across all payers, Dmand AI patient panel data puts Dr. Tomassi's median patient age at 67, with 46% women.
Dr. Tomassi's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women46%
- Men54%
Source: Dmand AI Patient Panel Data
Dr. Marco James Tomassi wrote 177 Medicare Part D claims in 2024
In 2024, Dr. Tomassi wrote 177 Medicare Part D claims for 60 patients. 98% of them were for generic drugs. CMS names the drug for 141 of them, across 5 drugs with 11 or more claims each, at $1,044 in total drug cost. In 2023, CMS named 120 claims across 5 drugs.
Dr. Tomassi's Part D claims by kind of drug, 2024
- Generic173 claims98%
- Brand-name and other4 claims2%
Dr. Tomassi's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Tomassi's Part D claims, 2024
- Opioids32%56 of 177 claims
- Antibiotics24%43 of 177 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1202024: 14118%
Drugs named by CMS: 5 in 2024, 5 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Marco James Tomassi takes part in Medicare
Dr. Tomassi accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Marco James Tomassi received $1,455 in industry payments from 2017 to 2025
CMS Open Payments shows 12 general payments to Dr. Tomassi from 4 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 60% of the total. Intuitive Surgical, Inc. paid the most, $961.
General payments to Dr. Tomassi by program year, 2017 to 2025
General payments to Dr. Tomassi by kind, 2017 to 2025
- Food and beverage$87760%
- Travel and lodging$57840%
Companies that paid Dr. Tomassi the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Marco James Tomassi has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Tomassi, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Tomassi
- 2011
- CMS Stage 1 2012
- Undated
- ACS Fellow
Source: Dmand AI Professional Profile Data
Dr. Marco James Tomassi graduated from New York Medical College
Dr. Tomassi graduated from New York Medical College in 2003. Dr. Tomassi is a member of ACS.
- Medical school
- Board certified in colon & rectal surgery
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. Marco James Tomassi accepts plans from 2 insurance carriers
Dr. Tomassi is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Tomassi accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Marco James Tomassi's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Marco James Tomassi
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Marco James Tomassi's NPI number?
Dr. Marco James Tomassi's NPI number is 1710144829. It was assigned on May 18, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Marco James Tomassi?
Dr. Marco James Tomassi is a general surgeon in San Diego, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Marco James Tomassi practice?
Dr. Tomassi practices at 4647 Zion Ave, San Diego, CA 92120. Dr. Tomassi's primary practice is Kaiser Permanente Zion Medical Center in San Diego, California, part of Kaiser Permanente. Dmand AI also links Dr. Tomassi to 1 other site.
What is Dr. Marco James Tomassi's office phone number?
The practice phone on file for Dr. Tomassi is (619) 528-5000.
What is Dr. Marco James Tomassi's medical license number?
Dr. Tomassi's California license number on file is A103631, one of the licenses on file in 2 states.
Which states has Dr. Marco James Tomassi been licensed in?
Dmand AI has state licenses on file for Dr. Tomassi in California (2008 to 2025) and Virginia (2009 to 2010).
Which hospitals is Dr. Marco James Tomassi affiliated with?
Dr. Tomassi practices at Kaiser Permanente Zion Medical Center in San Diego, California.
What medical group is Dr. Marco James Tomassi part of?
Dr. Tomassi is linked to Southern California Permanente Medical Group.
Does Dr. Marco James Tomassi accept Medicare?
Yes. CMS lists Dr. Tomassi as accepting Medicare assignment.
Is Dr. Marco James Tomassi board certified?
Yes. Dr. Tomassi is board certified in colon & rectal surgery by the American Board of Colon and Rectal Surgery.
Show 5 more questionsShow fewer questions
Where did Dr. Marco James Tomassi go to medical school?
Dr. Tomassi graduated from New York Medical College in 2003.
What drugs does Dr. Marco James Tomassi prescribe most?
In 2024 Medicare Part D data, Dr. Tomassi's most prescribed drugs by claims were Tramadol HCl, Ibuprofen and Gabapentin.
Has Dr. Marco James Tomassi received payments from drug or device companies?
CMS Open Payments shows $1,455 in general payments to Dr. Tomassi from 4 companies from 2017 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Marco James Tomassi been practicing?
Dr. Tomassi graduated from medical school in 2003, 23 years ago.
What insurance does Dr. Marco James Tomassi accept?
Dr. Tomassi is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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