Robert Leo Owen, M.D.
Gastroenterology Physician · San Francisco, CA
Robert Leo Owen, M.D. is a gastroenterology physician with a practice address in San Francisco, California, and NPI 1639111628, issued on Jun 12, 2006. Check the license (California G15034, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert Leo Owen
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- G15034 CA
2759R LA
Self-reported in NPPES; status is on the state search - Practice location
- 4150 Clement St, San Francisco, CA 94121
- Phone
- (415) 750-2101
- Enumerated
- Jun 12, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (415) 750-2249
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 4150 Clement St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Alison Acerra, MS, RDRegistered Dietitian1992726848
- Sharon AdelsonCounselor1932467271
- Gary Agcaoili, C.T.R.SRecreation Therapist1649284019
Verify Robert Leo Owen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G15034Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $125.00
1 payment: food and beverage; the largest payer was Genzyme Corporation. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Robert Leo Owen among 2,140 gastroenterology physician records in California
Robert Leo Owen, M.D. 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. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 48% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2026 · 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.
All 2,140 in California → Every provider in San Francisco → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Annsa Huang, MDSan Francisco, CA 941211861881658
- Kenneth McQuaid, M.D.San Francisco, CA 941211497781009
- James Ryan, M.D.San Francisco, CA 941211245310275
- Martin Spitz, M.D.San Francisco, CA 941211871578021
- Wing Kam, M.D., PH.D.San Francisco, CA 941181003964826
- Dean Rider, MDSan Francisco, CA 941181487759296
- Brock Macdonald, M.D.San Francisco, CA 941171689901506
- James Ostroff, MDSan Francisco, CA 941171477505881
Common questions
What is Robert Leo Owen, M.D.'s NPI number?
Robert Leo Owen, M.D.'s National Provider Identifier (NPI) is 1639111628, issued on Jun 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Leo Owen, M.D. located?
The NPPES record lists a practice address at 4150 Clement St, San Francisco, CA, 94121. Phone: (415) 750-2101. Providers update this record themselves, so call before visiting.
How can I verify Robert Leo Owen, M.D.'s license?
NPPES lists California license number G15034, 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. Medicare files from data.cms.gov. 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.