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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. JAMES B GERSTNER MD
NPI 1285633503
Internal Medicine - Hematology & Oncology in Peoria, IL

Active since July 19, 2005
8940 N WOOD SAGE RD, PEORIA, IL 61615(309) 243-3000(309) 243-3050 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

About Dr. James B Gerstner Md NPPES

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

DR. JAMES B GERSTNER MD (NPI 1285633503) is an individual hematology & oncology provider in Peoria, Illinois and active in the NPI registry since July 2005.

NPPES Registry Identity

NPI1285633503
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameDR. JAMES B GERSTNERCredential: MD
Location Address8940 N WOOD SAGE RDPeoria, IL 61615-7822
Mailing Address8940 N Wood Sage RdPeoria, IL 61615-7822 · (309) 243-3000 · Fax (309) 243-3050
Phone(309) 243-3000
Fax(309) 243-3050
Sole ProprietorNo
Enumeration DateJuly 19, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1285633503 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
8940 N WOOD SAGE RD, Peoria, IL 61615
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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.

DEBRA E BEACH APN
Clinical Nurse Specialist
8940 N WOOD SAGE RD
PEORIA, IL 61615
Peoria County (309) 243-3000
AMY J KRUS RN
Registered Nurse
8940 N WOOD SAGE RD
PEORIA, IL 61615
Peoria County (309) 243-3575
JIJUN LIU MD
Internal Medicine (Hematology & Oncology)
8940 N WOOD SAGE RD
PEORIA, IL 61615
Peoria County (309) 243-3000
ONCOLOGY-HEMATOLOGY ASSOCIATES OF CENTRAL ILLINOIS P C
Pharmacy (Community/Retail Pharmacy)
8940 N WOOD SAGE RD
PEORIA, IL 61615
Peoria County (309) 243-3405
DR. PAUL A.S. FISHKIN MD
Internal Medicine (Hematology & Oncology)
8940 N WOOD SAGE RD
PEORIA, IL 61615
Peoria County (309) 243-3000
PANKAJ KUMAR M.D.
Internal Medicine (Hematology & Oncology)
8940 N WOOD SAGE RD
PEORIA, IL 61615
Peoria County (309) 243-3000
DR. JOHN W KUGLER MD
Internal Medicine (Hematology & Oncology)
8940 N WOOD SAGE RD
PEORIA, IL 61615
Peoria County (309) 243-3000
MRS. JESSICA M STEWART CNS
Clinical Nurse Specialist
8940 N WOOD SAGE RD
PEORIA, IL 61615
Peoria County (309) 243-3000

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 James Gerstner's NPI number?

The NPI number for James Gerstner is 1285633503. It was assigned to this individual provider in the NPPES registry on July 19, 2005.

Where is James Gerstner located?

James Gerstner practices at 8940 N Wood Sage Rd, Peoria, IL 61615. The listed phone number is (309) 243-3000.

What is James Gerstner's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

When was this NPI record last updated?

The NPPES record for James Gerstner was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 49 days 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.