Mary F. Chan, MD
Gastroenterology Physician · Menlo Park, CA
Mary F. Chan, MD is a gastroenterology physician with a practice address in Menlo Park, California, and NPI 1790749430, issued on Apr 12, 2006. Check the license (California G66642, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mary F. Chan
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- G66642 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1300 Crane Street, Menlo Park, CA 94025
- Phone
- (650) 498-6500
- Enumerated
- Apr 12, 2006
- Record last updated
- Jul 13, 2026
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 1300 Crane Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mary F. Chan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G66642Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mary F. Chan among 2,140 gastroenterology physician records in California
Mary F. Chan, MD 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 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. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,140 in California → Every provider in Menlo Park → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Sinda Mein, MDMenlo Park, CA 940251376657734
- Tu Nguyen, MDMenlo Park, CA 940251497841969
- Harvey Young, M.D.Menlo Park, CA 940251093768483
- John Selling, MDPortola Valley, CA 940281386608024
- Stefan Chin, MDDaly City, CA 940151891794152
- John Fisher, M.D.Daly City, CA 940151639179799
- Rowena Garcia Chuapoco, MDDaly City, CA 940151578563789
- Mark Tsuchiyose, M.D.Daly City, CA 940151063412195
Common questions
What is Mary F. Chan, MD's NPI number?
Mary F. Chan, MD's National Provider Identifier (NPI) is 1790749430, issued on Apr 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary F. Chan, MD located?
The NPPES record lists a practice address at 1300 Crane Street, Menlo Park, CA, 94025. Phone: (650) 498-6500. Providers update this record themselves, so call before visiting.
How can I verify Mary F. Chan, MD's license?
NPPES lists California license number G66642, 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.