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DR. GREGORY KEITH NELLIGAN M.D.
NPI 1205924842
Internal Medicine - Gastroenterology in Madison, WI

Active since October 10, 2006
2500 OVERLOOK TER, MADISON, WI 53705(608) 256-1901(608) 280-7020 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Gregory Keith Nelligan M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GREGORY KEITH NELLIGAN M.D. (NPI 1205924842) is an individual gastroenterology provider in Madison, Wisconsin and active in the NPI registry since October 2006.

NPPES Registry Identity

NPI1205924842
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. GREGORY KEITH NELLIGANCredential: M.D.
Location Address2500 OVERLOOK TERMadison, WI 53705-2254
Mailing Address2500 Overlook TerMadison, WI 53705-2254 · (608) 256-1901 · Fax (608) 280-7020
Phone(608) 256-1901
Fax(608) 280-7020
Sole ProprietorNo
Enumeration DateOctober 10, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1205924842 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Definition
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.
2500 OVERLOOK TER, Madison, WI 53705
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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MEGHANN BETH KRUEGER M.S.W.
Social Worker
2500 OVERLOOK TER
MADISON, WI 53705
Dane County (608) 295-1901
DR. MARIA CHARMAINE WOPAT PHARMD
Pharmacist
2500 OVERLOOK TER
MADISON, WI 53705
Dane County (608) 256-1901
MS. LEAH ALLISON FINCH CAPSW
Social Worker (Clinical)
2500 OVERLOOK TER
MADISON, WI 53705
Dane County (608) 256-1901
MRS. JENEA KATHLEEN STASSI BSN, WCC
Registered Nurse (Wound Care)
2500 OVERLOOK TER
MADISON, WI 53705
Dane County (608) 256-1901
LINDSAY BERNING RN
Registered Nurse
2500 OVERLOOK TER
MADISON, WI 53705
Dane County (608) 280-7003
JACOB HENRY FITZSIMMONS
Registered Nurse
2500 OVERLOOK TER
MADISON, WI 53705
Dane County (608) 280-7110
LAYLIA JULIA YANG PHARMD
Pharmacist
2500 OVERLOOK TER
MADISON, WI 53705
Dane County (608) 256-1901
DR. BEVERLY A PRIEFER PHD, APRN
Registered Nurse (Medical-Surgical)
2500 OVERLOOK TER
MADISON, WI 53705
Dane County (608) 280-7080

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gregory Nelligan's NPI number?

The NPI number for Gregory Nelligan is 1205924842. It was assigned to this individual provider in the NPPES registry on October 10, 2006.

Where is Gregory Nelligan located?

Gregory Nelligan practices at 2500 Overlook Ter, Madison, WI 53705. The listed phone number is (608) 256-1901.

What is Gregory Nelligan's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

When was this NPI record last updated?

The NPPES record for Gregory Nelligan was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.