Gregory Mark Welsh, MD
Hospitalist Physician · Stanford, CA
Gregory Mark Welsh, MD is a hospitalist physician with a practice address in Stanford, California, and NPI 1982600342, issued on Jun 21, 2005. Check the license (California C167888, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Gregory Mark Welsh
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- C167888 CA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Pasteur Dr, Stanford, CA 94305
- Phone
- (650) 723-4000
- Enumerated
- Jun 21, 2005
- Record last updated
- Apr 28, 2024
- Medicaid IDs
- 1982600342 WA
1090364 WA - Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 300 Pasteur Dr
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Verify Gregory Mark Welsh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C167888Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Gregory Mark Welsh among 3,099 hospitalist physician records in California
Gregory Mark Welsh, MD is one of 3,099 hospitalist physician records with a practice address in California. 90% 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 98% newer
- In a Medicare fileNo · 90% of these records are
- In the CMS Doctors and Clinicians fileNo · 81% of these records are
- Record last updated2024 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,099 in California → Every provider in Stanford → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Gregory Auda, MDStanford, CA 943051326509191
- Robert Gallo, MDPalo Alto, CA 943051992268395
- Andrea Lorenze, M.D.Stanford, CA 943051003159062
- Tristan Nichols, DOStanford, CA 943051548503360
- Faizah ShareefStanford, CA 943051942959580
- Rachel Bharwani, MDPalo Alto, CA 943041306426986
- Kevin Chen, DOPalo Alto, CA 943041053948331
- Anushka Das, MDPalo Alto, CA 943041013545441
Common questions
What is Gregory Mark Welsh, MD's NPI number?
Gregory Mark Welsh, MD's National Provider Identifier (NPI) is 1982600342, issued on Jun 21, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Mark Welsh, MD located?
The NPPES record lists a practice address at 300 Pasteur Dr, Stanford, CA, 94305. Phone: (650) 723-4000. Providers update this record themselves, so call before visiting.
How can I verify Gregory Mark Welsh, MD's license?
NPPES lists California license number C167888, 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.