Individual provider · Type 1 NPI

Ronald Mark Tilsen, MD

Internal Medicine Physician · Newport Beach, CA

NPI number 1801852280 Active

Practice location

400 Newport Center Dr, Suite 608
Newport Beach, CA 92660-7601

Call (949) 644-3559 Map

Fax (949) 718-6729

Specialties and licenses

TaxonomyCodeLicense
Internal Medicine Physician Primary 207R00000XG34508 (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 1801852280

Ronald Mark Tilsen, MD's National Provider Identifier is 1801852280, issued on Apr 25, 2006. The primary taxonomy on file is Internal Medicine Physician (207R00000X), and the practice location is in Newport Beach, CA. The record was last updated on Jul 13, 2026.