Individual provider · Type 1 NPI

Michael Ansstas, MD

Gastroenterology Physician · St. Louis, MO

NPI number 1851658728 Active

Practice location

11155 Dunn Rd Ste 309E
St. Louis, MO 63136-6111

Call (314) 953-8799 Map

Other practice locations

  • 4 Memorial Dr Ste 230B, Alton, IL 62002-6705 · (618) 463-7874
  • 3 Saint Elizabeth Blvd, O Fallon, IL 62269-1281 · (618) 641-5803

Specialties and licenses

TaxonomyCodeLicense
Gastroenterology Physician 207RG0100X036153515 (IL)
Gastroenterology Physician Primary 207RG0100X2012032351 (MO)
Gastroenterology Physician 207RG0100XA160085 (CA)

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.

5 other providers at this address

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About NPI 1851658728

Michael Ansstas, MD's National Provider Identifier is 1851658728, issued on Apr 17, 2012. The primary taxonomy on file is Gastroenterology Physician (207RG0100X), and the practice location is in St. Louis, MO. The record was last updated on Oct 27, 2025.