Individual provider · Type 1 NPI

Allan Douglas Siefkin, MD

Internal Medicine Physician · Sacramento, CA

NPI number 1033113758 Active

Practice location

2315 Stockton Blvd
Sacramento, CA 95817-2201

Call (916) 734-1166 Map

Fax (916) 734-3234

Specialties and licenses

TaxonomyCodeLicense
Internal Medicine Physician Primary 207R00000XG032410 (CA)
Critical Care Medicine (Internal Medicine) Physician 207RC0200XG032410 (CA)
Pulmonary Disease Physician 207RP1001XG032410 (CA)

Internal Medicine Physician: A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medi…

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About NPI 1033113758

Allan Douglas Siefkin, MD's National Provider Identifier is 1033113758, issued on Jun 9, 2005. The primary taxonomy on file is Internal Medicine Physician (207R00000X), and the practice location is in Sacramento, CA. The record was last updated on Jul 13, 2026.