Individual provider · Type 1 NPI

Mark C. Johnson, MD

Internal Medicine Physician · Mason City, IA

NPI number 1013923127 Active

Practice location

910 N Eisenhower Ave
Mason City, IA 50401-2800

Call (641) 428-7799 Map

Fax (641) 428-5274

Mailing address

621 S Illinois Ave, Suite 103
Mason City, IA 50401-5489

Specialties and licenses

TaxonomyCodeLicense
Internal Medicine Physician Primary 207R00000X21527 (IA)

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 1013923127

Mark C. Johnson, MD's National Provider Identifier is 1013923127, issued on Jul 31, 2006. The primary taxonomy on file is Internal Medicine Physician (207R00000X), and the practice location is in Mason City, IA. The record was last updated on Jul 8, 2025.