National Provider Identifier Database

GREGORY A DERFUS, MD – NPI #1861465304
Gastroenterology

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.


Contact Information

GREGORY A DERFUS, MD
1400 BELLINGER ST
EAU CLAIRE, WI54703-5222
Phone: 715-838-5222
Fax:
Website:
Specialty Taxonomy Code
* Gastroenterology 207RG0100X

* Indicates primary specialty

NPI Profile & details for GREGORY A DERFUS

NPI Number 1861465304
Credentials MD
Entity Individual
Enumeration date 02/07/2006
Last updated 02/09/2024 - About 2 years ago
Sole proprietor1 No
Identifiers
  • WI License #: 28466
Hospital affiliation n/a

1 A sole proprietor/sole proprietorship is an individual, and as such, is eligible for a single NPI number. The sole proprietor must apply for the NPI number using his or her own Social Security Number (SSN), not an Employer Identification Number (EIN) even if he/she has an EIN.

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