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Physician Profile

Allan D. Siefkin, MD

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At a glance

About Dr. Siefkin

Based in Sacramento, CA, Allan D. Siefkin, MD is listed in the NPI registry under internal medicine. Allan is also listed as specializing in critical care medicine and pulmonary disease. NPI 1033113758 identifies this record in the national registry.

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

Specialty

Internal Medicine (Primary)
Critical Care Medicine (Additional)
Pulmonary Disease (Additional)

Credentials & Licensing

CA · Physician and Surgeon GMedical Board of California
No. 32410DelinquentExpired Jun 30, 2025Since 1976
CA licenceAs reported to the NPI registry
No. G032410As reported
NPINational Provider Identifier
1033113758Issued 2005

Snapshot · verify with the board ↗

Common questions

What kind of doctor is Dr. Siefkin?

Dr. Siefkin is an internist in Sacramento, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.

NPI registry

What is Dr. Siefkin's address?

Dr. Siefkin is listed at 2315 Stockton Blvd, Sacramento, CA 95817. Addresses come from the NPI registry and can lag a move, so confirm before travelling.

NPI registry

How can I make an appointment with Dr. Siefkin?

The number on file is (916) 734-1166. Contact the office directly to confirm availability and scheduling.

NPI registry

What is Dr. Siefkin's NPI number?

Dr. Siefkin's National Provider Identifier is 1033113758. 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. Siefkin been practicing?

Dr. Siefkin has 21+ years experience. Registered with an NPI since 2005. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.

NPI registry

Has Dr. Siefkin confirmed this information?

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

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Guide.md listings do not constitute medical advice or an endorsement.

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