Individual provider · Type 1 NPI

Douglas A. Shumaker, MD

Gastroenterology Physician · Portland, OR

NPI number 1225034937 Active

Practice location

9701 SW Barnes Rd, Ste 300
Portland, OR 97225-6689

Call (503) 297-8081 Map

Fax (503) 292-6601

Mailing address

541 NE 20th Ave Ste 225
Portland, OR 97232-2895

Specialties and licenses

TaxonomyCodeLicense
Gastroenterology Physician Primary 207RG0100XMD19573 (OR)
Allergy Physician 207KA0200XMD19573 (OR)

Gastroenterology Physician: An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

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About NPI 1225034937

Douglas A. Shumaker, MD's National Provider Identifier is 1225034937, issued on Jun 27, 2005. The primary taxonomy on file is Gastroenterology Physician (207RG0100X), and the practice location is in Portland, OR. The record was last updated on Dec 4, 2025.