Physician Profile
William N. Hamstra, D.O.
Unclaimed ProfileAbout Dr. Hamstra
Based in San Ramon, CA, William N. Hamstra, D.O. is listed in the NPI registry under surgery. William graduated from Oklahoma State University College of Osteopathic Medicine in 1986.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (925) 447-0660
- Email not available
Practice Locations
2305 CAMINO RAMON SUITE 217
San Ramon, CA 94583
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other general surgeons in San Ramon 5
Same specialty, same city.
Trained at Oklahoma State University College of Osteopathic Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 8 related providers in 1 group
Class of 1986 at Oklahoma State University College of Osteopathic Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What kind of doctor is William N. Hamstra?
William N. Hamstra is a general surgeon in San Ramon, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Surgery”.
NPI registry
What is William N. Hamstra's address?
William N. Hamstra is listed at 2305 Camino Ramon Suite 217, San Ramon, CA 94583. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with William N. Hamstra?
The number on file is (925) 447-0660. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for William N. Hamstra?
William N. Hamstra's National Provider Identifier is 1306835723. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did William N. Hamstra train?
William N. Hamstra attended Oklahoma State University College of Osteopathic Medicine, graduating in 1986. This comes from the CMS National Downloadable File.
CMS public data
How much experience does William N. Hamstra have?
William N. Hamstra has 40 years experience. Calculated from a graduation year of 1986, reported in the CMS National Downloadable File.
CMS public data
Is William N. Hamstra's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by William N. Hamstra. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.