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Edit this profileAt a glance
- 1425 S Main St, Walnut Creek, CA 94596
About Dr. Greif
Based in Walnut Creek, CA, William M. Greif, MD is listed in the NPI registry under general surgery. William graduated from Stanford University School of Medicine in 1993. William is also listed as specializing in surgery. NPI 1013095108 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
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) 295-4000
- Email not available
Practice Locations
1425 S MAIN ST
Walnut Creek, CA 94596
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 Walnut Creek 8
Same specialty, same city.
Trained at Stanford University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 8 related providers in 1 group
Class of 1993 at Stanford University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. Greif specialize in?
Dr. Greif is a general surgeon in Walnut Creek, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “General Surgery”.
NPI registry
Where is Dr. Greif located?
Dr. Greif is listed at 1425 S Main St, Walnut Creek, CA 94596. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Greif's phone number?
The number on file is (925) 295-4000. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Greif's NPI number?
Dr. Greif's National Provider Identifier is 1013095108. 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 Dr. Greif go to medical school?
Dr. Greif attended Stanford University School of Medicine, graduating in 1993. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Greif been practicing?
Dr. Greif has 33 years experience. Calculated from a graduation year of 1993, reported in the CMS National Downloadable File.
CMS public data
Has Dr. Greif confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Greif. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.