Thomas Larson
Gastroenterology Physician · Santa Cruz, CA
Thomas Larson is a gastroenterology physician with a practice address in Santa Cruz, California, and NPI 1427038017, issued on Jan 19, 2006. Check the license (California G34674, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Thomas Larson
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- G34674 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2850 Commercial Crossing, Santa Cruz, CA 95065
- Phone
- (831) 460-7350
- Enumerated
- Jan 19, 2006
- Record last updated
- Dec 23, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20080702000700); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 2850 Commercial Crossing
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Elizabeth Brennan, M.D.Internal Medicine Physician1982794855
- Lisa Segnitz, M.D.Hospice and Palliative Medicine (Family Medicine) Physician1912907080
- Kuntal Thaker, MDGastroenterology Physician1952369191
- Janet WangHematology & Oncology Physician1760629158
Verify Thomas Larson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G34674Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Thomas Larson among 2,140 gastroenterology physician records in California
Thomas Larson is one of 2,140 gastroenterology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 48% newer
- In a Medicare fileNo · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1976 · median 2002 among the 1,538 with a school on file
- Record last updated2011 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,140 in California → Every provider in Santa Cruz → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- David Anjelly, M.D.Santa Cruz, CA 950651629338603
- Justin Bennet, MD PHDSanta Cruz, CA 950651134299308
- Geoffrey Bernstein, MDSanta Cruz, CA 950651609855741
- Krish GandhiSanta Cruz, CA 950651215382080
- Kourosh Ghassemi, MDSanta Cruz, CA 950651215016969
- Treta Goyal, M.B.B.S,, M.P.H.Santa Cruz, CA 950651558612770
- Gordon Lee, MDSanta Cruz, CA 950651124100367
- Zenowij Majuk, MDSanta Cruz, CA 950651851376297
Common questions
What is Thomas Larson's NPI number?
Thomas Larson's National Provider Identifier (NPI) is 1427038017, issued on Jan 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Larson located?
The NPPES record lists a practice address at 2850 Commercial Crossing, Santa Cruz, CA, 95065. Phone: (831) 460-7350. Providers update this record themselves, so call before visiting.
How can I verify Thomas Larson's license?
NPPES lists California license number G34674, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.