Dr. Gregory Mark Welsh, MD
- Publications
- 1
- Hospital affiliations
- 2
- Medical group
- 1
- Insurance carriers
- 5
- State licenses
- 2
- Practice address
- 5555 West Las Positas Boulevard, Pleasanton, CA 94588
- Practice phone
- Call (925) 847-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Welsh's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gregory Mark Welsh is a hospitalist in Pleasanton, California
Dr. Welsh practices at Stanford Health Care Tri-Valley in Pleasanton, California, part of Stanford University.
Dr. Welsh's NPI, 1982600342, was assigned on June 21, 2005. Dr. Welsh graduated from The Johns Hopkins University School of Medicine in 1989. Dr. Welsh holds California license C167888.
- NPI
- 1982600342NPI Registry (opens in a new tab)
- NPI enumeration date
- June 21, 2005
- NPI status
- Active
- Practice phone
- (925) 847-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Gregory Mark Welsh practices at Stanford Health Care Tri-Valley in Pleasanton, California
Dr. Welsh's primary practice is Stanford Health Care Tri-Valley, at 5555 West Las Positas Boulevard, Pleasanton, CA 94588 in Alameda County. The practice phone is (925) 847-3000.
- Stanford Health Care Tri-Valley5555 West Las Positas Boulevard, Pleasanton, CA 94588 · Alameda CountyPhone(925) 847-3000
Source: Dmand AI Affiliation Data
Dr. Gregory Mark Welsh is affiliated with 2 sites of care and 1 medical group
Dr. Welsh's primary practice is Stanford Health Care Tri-Valley in Pleasanton, California, part of Stanford University. Dr. Welsh is also affiliated with Stanford Hospital at 300 Pasteur Drive. The medical group on file is Lucile Packard Children's Hospital Stanford.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory Mark Welsh's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Welsh practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Stanford Health Care Tri-Valley | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Stanford University and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Gregory Mark Welsh is one of 3,186 hospitalists in California
Hospitalist is Dr. Welsh's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Welsh is board certified in pediatrics by the American Board of Pediatrics. Dmand AI has Dr. Welsh's licenses on file in 2 states: California and Washington.
Specialties and state licenses
- Hospitalist, CaliforniaPrimary
- Washington license
Hospitalists near Dr. Welsh
Counts of hospitalists 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. Gregory Mark Welsh's patients have a median age of 28
Across all payers, Dmand AI patient panel data puts Dr. Welsh's median patient age at 28, with 81% women.
Dr. Welsh's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 28
Patient panel by sex, all payers
- Women81%
- Men19%
Source: Dmand AI Patient Panel Data
Dr. Gregory Mark Welsh has 1 publication on record
Dmand AI links 1 paper to Dr. Welsh.
Recent publications by Dr. Welsh
See who Dr. Welsh researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Welsh works with, so you can find a warm path to the right hospitalists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gregory Mark Welsh graduated from The Johns Hopkins University School of Medicine
Dr. Welsh graduated from The Johns Hopkins University School of Medicine in 1989.
- Medical school
- Board certified in pediatrics
Source: Dmand AI Professional Profile Data
Dr. Gregory Mark Welsh accepts plans from 5 insurance carriers
Dr. Welsh is in network with 5 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
Plan types Dr. Welsh accepts, by number of carriers
- Medicare5
- PPO4
- HMO2
- POS2
Source: Dmand AI Insurance Network Data
Sources for Dr. Gregory Mark Welsh'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 |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Gregory Mark Welsh
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. Gregory Mark Welsh's NPI number?
Dr. Gregory Mark Welsh's NPI number is 1982600342. It was assigned on June 21, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory Mark Welsh?
Dr. Gregory Mark Welsh is a hospitalist in Pleasanton, California. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Gregory Mark Welsh practice?
Dr. Welsh practices at 5555 West Las Positas Boulevard, Pleasanton, CA 94588. Dr. Welsh's primary practice is Stanford Health Care Tri-Valley in Pleasanton, California, part of Stanford University.
What is Dr. Gregory Mark Welsh's office phone number?
The practice phone on file for Dr. Welsh is (925) 847-3000.
What is Dr. Gregory Mark Welsh's medical license number?
Dr. Welsh holds California license C167888, one of the licenses on file in 2 states.
Which states has Dr. Gregory Mark Welsh been licensed in?
Dmand AI has state licenses on file for Dr. Welsh in California (2020 to 2026) and Washington (1991 to 2021).
Which hospitals is Dr. Gregory Mark Welsh affiliated with?
Dr. Welsh practices at Stanford Health Care Tri-Valley in Pleasanton, California. Dr. Welsh is also affiliated with Stanford Hospital at 300 Pasteur Drive.
What medical group is Dr. Gregory Mark Welsh part of?
Dr. Welsh is linked to Lucile Packard Children's Hospital Stanford.
Is Dr. Gregory Mark Welsh board certified?
Yes. Dr. Welsh is board certified in pediatrics by the American Board of Pediatrics.
Where did Dr. Gregory Mark Welsh go to medical school?
Dr. Welsh graduated from The Johns Hopkins University School of Medicine in 1989.
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How long has Dr. Gregory Mark Welsh been practicing?
Dr. Welsh graduated from medical school in 1989, 37 years ago.
Does Dr. Gregory Mark Welsh do research?
Dmand AI links 1 publication to Dr. Welsh.
What insurance does Dr. Gregory Mark Welsh accept?
Dr. Welsh is in network with 5 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
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