Individual provider · Type 1 NPI

Matthew William Stier, MD

Internal Medicine Physician · Lake Barrington, IL

NPI number 1902244791 Active

Practice location

22285 N Pepper Rd Ste 311
Lake Barrington, IL 60010-2541

Specialties and licenses

TaxonomyCodeLicense
Internal Medicine Physician Primary 207R00000X125062675 (IL)
Gastroenterology Physician 207RG0100X036139723 (IL)

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 1902244791

Matthew William Stier, MD's National Provider Identifier is 1902244791, issued on Jun 13, 2013. The primary taxonomy on file is Internal Medicine Physician (207R00000X), and the practice location is in Lake Barrington, IL. The record was last updated on Oct 19, 2026.