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Physician Profile

William J. Collins, MD

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At a glance

About Dr. Collins

William J. Collins, MD practices gastroenterology in Orange, CA. The provider's National Provider Identifier (NPI) is 1104892074.

Factual summary compiled by Guide.md from public records; not written by this provider.

Specialty

Gastroenterology (Primary)

Credentials & Licensing

CA · Physician and Surgeon CMedical Board of California
No. 33697DelinquentExpired Aug 31, 2025Since 1971
NPINational Provider Identifier
1104892074Issued 2006

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Common questions

What is Dr. Collins's specialty?

Dr. Collins is a gastroenterologist in Orange, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.

NPI registry

Where can I find Dr. Collins?

Dr. Collins is listed at 1201 W la Veta Ave Suite 211, Orange, CA 92868. Addresses come from the NPI registry and can lag a move, so confirm before travelling.

NPI registry

How do I contact Dr. Collins?

The number on file is (714) 639-3363. Contact the office directly to confirm availability and scheduling.

NPI registry

What is Dr. Collins's NPI number?

Dr. Collins's National Provider Identifier is 1104892074. 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. Collins been practicing?

Dr. Collins 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. Collins confirmed this information?

Not yet. This profile is built from public federal data and has not been confirmed by Dr. Collins. If this is you, claiming it is free.

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