Individual provider · Type 1 NPI

Ryan Joseph Duff, MD

Internal Medicine Physician · San Antonio, TX

NPI number 1043802929 Active

Practice location

3551 Roger Brooke Dr
San Antonio, TX 78234-4504

Call (210) 916-2153 Map

Fax (210) 916-0709

Specialties and licenses

TaxonomyCodeLicense
General Practice Physician 208D00000X2022041862 (MO)
Internal Medicine Physician Primary 207R00000X2022041862 (MO)

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 1043802929

Ryan Joseph Duff, MD's National Provider Identifier is 1043802929, issued on Feb 11, 2021. The primary taxonomy on file is Internal Medicine Physician (207R00000X), and the practice location is in San Antonio, TX. The record was last updated on Jun 19, 2026.