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MARK T SHIELS M.D.
NPI 1104812023
Internal Medicine - Gastroenterology in Rockford, IL

Active since September 26, 2005
401 ROXBURY RD, ROCKFORD, IL 61107(815) 397-7340(815) 397-2156 Get Directions Write a Review

NPPES record last updated: September 6, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Mark T Shiels M.d. NPPES

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

MARK T SHIELS M.D. (NPI 1104812023) is an individual gastroenterology provider in Rockford, Illinois, licensed in Illinois (36072619) and active in the NPI registry since September 2005.

NPPES Registry Identity

NPI1104812023
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameMARK T SHIELSCredential: M.D.
Location Address401 ROXBURY RDRockford, IL 61107-5075
Mailing Address401 Roxbury RdRockford, IL 61107-5075 · (815) 397-7340 · Fax (815) 397-2156
Phone(815) 397-7340
Fax(815) 397-2156
Sole ProprietorNo
Enumeration DateSeptember 26, 2005
Last NPPES UpdateSeptember 6, 2007
✔ NPI 1104812023 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in IL · 36072619
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.
401 ROXBURY RD, Rockford, IL 61107
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Other Identifiers 2

Medicare UPINA02264IL
Medicare ID-Type UnspecifiedL04542IL

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.

WILLIAM N BASKIN M.D.
Internal Medicine (Gastroenterology)
401 ROXBURY RD
ROCKFORD, IL 61107
Winnebago County (815) 397-7340
ROBERT L BARCLAY M.D.
Internal Medicine (Gastroenterology)
401 ROXBURY RD
ROCKFORD, IL 61107
Winnebago County (815) 397-7340
DR. SUMEET K. TEWANI MD
Internal Medicine (Gastroenterology)
401 ROXBURY RD
ROCKFORD, IL 61107
Winnebago County (815) 397-7340
DR. NABIL DAVID BADDOUR D.O., MPH
Internal Medicine (Gastroenterology)
401 ROXBURY RD
ROCKFORD, IL 61107
Winnebago County (815) 397-7340
HASAN BADER M.D.
Internal Medicine (Gastroenterology)
401 ROXBURY RD
ROCKFORD, IL 61107
Winnebago County (815) 381-7340
JAMES T FRAKES M.D., M.S.
Internal Medicine (Gastroenterology)
401 ROXBURY RD
ROCKFORD, IL 61107
Winnebago County (815) 397-7340
STEVEN O IKENBERRY M.D.
Internal Medicine (Gastroenterology)
401 ROXBURY RD
ROCKFORD, IL 61107
Winnebago County (815) 397-7340
MICHAEL J MANLEY M.D.
Internal Medicine (Gastroenterology)
401 ROXBURY RD
ROCKFORD, IL 61107
Winnebago County (815) 397-7340

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 Mark Shiels's NPI number?

The NPI number for Mark Shiels is 1104812023. It was assigned to this individual provider in the NPPES registry on September 26, 2005.

Where is Mark Shiels located?

Mark Shiels practices at 401 Roxbury Rd, Rockford, IL 61107. The listed phone number is (815) 397-7340.

What is Mark Shiels'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 Mark Shiels was last updated on September 6, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.