Individual provider · Type 1 NPI

Ryan D. McMahan, MD, MAS

Internal Medicine Physician · San Francisco, CA

NPI number 1356978308 Active

Practice location

2425 Geary Blvd
San Francisco, CA 94115-3358

Call (415) 833-2000 Map

Other practice locations

  • 1001 Potrero Ave, San Francisco, CA 94110-3518 · (628) 206-8000

Specialties and licenses

TaxonomyCodeLicense
Internal Medicine Physician Primary 207R00000XA185859 (CA)
Student in an Organized Health Care Education/Training Program 390200000XNone listed

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 1356978308

Ryan D. McMahan, MD, MAS's National Provider Identifier is 1356978308, issued on Mar 26, 2020. The primary taxonomy on file is Internal Medicine Physician (207R00000X), and the practice location is in San Francisco, CA. The record was last updated on Oct 6, 2025.