Individual provider · Type 1 NPI

James Stephen Allen, DO

Internal Medicine Physician · San Ramon, CA

NPI number 1902099518 Active

Practice location

6001 Bollinger Canyon Rd, Chevron Singapore-Orchard
San Ramon, CA 94583-7170

Call (925) 842-3224 Map

Fax (925) 842-3242

Other practice locations

  • 1813 Sumner Ave, Aberdeen, WA 98520-4600 · (360) 538-1293

Specialties and licenses

TaxonomyCodeLicense
Internal Medicine Physician 207R00000XOP61072641 (WA)
Internal Medicine Physician Primary 207R00000X159380-1 (NY)

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 1902099518

James Stephen Allen, DO's National Provider Identifier is 1902099518, issued on Aug 27, 2007. The primary taxonomy on file is Internal Medicine Physician (207R00000X), and the practice location is in San Ramon, CA. The record was last updated on Mar 17, 2026.