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Edit this profileAt a glance
- 1425 S Main St, Walnut Creek, CA 94596
About Dr. Marshall
Based in Walnut Creek, CA, Gregory A. Marshall, MD is listed in the NPI registry under urology. NPI 1437237526 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
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.
Related specialists at this location 2
Clinically related specialties at the same address — the people this provider most likely works alongside.
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.
Common questions
What does Dr. Marshall specialize in?
Dr. Marshall is an urologist in Walnut Creek, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Urology”.
NPI registry
Where is Dr. Marshall located?
Dr. Marshall 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. Marshall'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. Marshall's NPI number?
Dr. Marshall's National Provider Identifier is 1437237526. 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
How long has Dr. Marshall been practicing?
Dr. Marshall has 20+ years experience. Registered with an NPI since 2006. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
Has Dr. Marshall confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Marshall. If this is you, claiming it is free.
Guide.md
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