DR. GREGORY JAMES GERSTNER M.D.
NPI 1629288659
Internal Medicine - Hematology & Oncology in Peoria, IL

Active since May 22, 2007PECOS EnrolledAccepts Medicare Assignment
72.93/100
CMS Quality Rating
8940 N WOOD SAGE RD, PEORIA, IL 61615(309) 243-3000(309) 243-3069 Get Directions Write a Review

NPPES record last updated: March 2, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Mar 2, 2026, Apr 8, 2019 (2 updates tracked since 2019).

About Dr. Gregory James Gerstner M.d. NPPES

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

DR. GREGORY JAMES GERSTNER M.D. (NPI 1629288659) is an individual hematology & oncology provider in Peoria, Illinois, licensed in Illinois (036.120707) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS, is affiliated with Saint Francis Medical Center, and is a graduate of Southern Illinois University School Of Medicine (2002).

NPPES Registry Identity

NPI1629288659
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameDR. GREGORY JAMES GERSTNERCredential: M.D.
Location Address8940 N WOOD SAGE RDPeoria, IL 61615-7822
Mailing Address8940 N Wood Sage RdPeoria, IL 61615-7822 · (309) 243-3000 · Fax (309) 243-3069
Fax(309) 243-3069
Sole ProprietorNo
Medical School CMSSouthern Illinois University School Of MedicineGraduated 2002
Enumeration DateMay 22, 2007
Last NPPES UpdateMarch 2, 20262 updates tracked since enumeration
NPPES CertifiedMarch 2, 2026
NPI 1629288659 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
Licenses Licensed in IL · 036.120707 Licensed in AZ · PG PERMIT# 80968
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

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Dr. Gregory James Gerstner M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8820160724
PECOS Enrollment IDI20080710000057
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 89

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Injection, ferric carboxymaltose, 1 mg J1439
Ferric carboxymaltose is an iron supplement injection. It's given when your body needs more iron than you can consume through diet, like in anemia. The injection is administered by a healthcare professional into a vein.
59,900 services52 patients
Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use) Q0138
Ferumoxytol injection is a treatment for iron deficiency anemia, a condition where your body lacks enough iron. It is injected into your vein to increase iron levels, aiding in the production of healthy red blood cells. This treatment is not for ESRD patients.
27,030 services37 patients
Injection, pembrolizumab, 1 mg J9271
Pembrolizumab is a medication given via injection to help your body's immune system fight certain types of cancer. It's typically administered in a hospital or clinic by a healthcare professional.
23,800 services39 patients
Injection, aprepitant, 1 mg J0185
Aprepitant injection is a medication used to prevent nausea and vomiting caused by chemotherapy. It works by blocking certain substances in the brain that trigger these symptoms. The dosage is based on your medical condition and response to treatment.
14,430 services42 patients
Injection, daratumumab, 10 mg and hyaluronidase-fihj J9144
Daratumumab and hyaluronidase-fihj is an injection administered to treat certain types of blood cancer. The medication works by targeting and killing specific cancer cells. It's often given under the skin to reduce side effects and improve patient comfort.
12,960 services14 patients
Injection, azacitidine, 1 mg J9025
Azacitidine is a medication administered via injection to treat certain types of blood or bone marrow cancer. This drug works by slowing or stopping the growth of cancer cells. It's typically given in a clinic or hospital setting by a healthcare professional.
12,300 services17 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Saint Francis Medical Center

Acute Care Hospitals · Peoria, IL
1/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140067
Location530 NE Glen Oak AvePeoria, IL 61637 · Peoria County
Emergency services Birthing friendly

Osf Saint Elizabeth Mdl Ctr

Acute Care Hospitals · Ottawa, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140110
Location1100 E Norris DriveOttawa, IL 61350 · La Salle County
Emergency services Birthing friendly

Methodist Medical Center Of Illinois

Acute Care Hospitals · Peoria, IL
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140209
Location221 N E Glen Oak AvePeoria, IL 61636 · Peoria County
Emergency services Birthing friendly

Osf Saint Paul Medical Center

Critical Access Hospitals · Mendota, IL
OwnershipVoluntary non-profit - Church
CMS Certification Number141310
Location1401 E 12th StreetMendota, IL 61342 · La Salle County
Emergency services

Osf Saint Clare Medical Center

Critical Access Hospitals · Princeton, IL
OwnershipGovernment - Local
CMS Certification Number141337
Location530 Park Avenue EastPrinceton, IL 61356 · Bureau County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 61615 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$168.44 typical visit price
range $54.80 – $168.44
Typical copayment $42.11 (range $13.70 – $42.11)
Most-billed visit code 99205
Established Patient
$97.25 typical visit price
range $17.16 – $136.56
Typical copayment $24.31 (range $4.29 – $34.14)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

72.93/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality63.96
Promoting Interoperability86
Improvement Activities40
Cost48.93

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Enteral feeding supply kit; syringe fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4034
Other-Enteral and Parenteral · category OB006N
2 suppliers12 claims310 services$3.57 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
3 suppliers18 claims21 services$107.11 avg. paid by Medicare
Capecitabine, oral, 500 mg J8521
Treatment-Treatment - Miscellaneous · category RX029N
1 supplier18 claims1,120 services$0.70 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512
Treatment-Chemotherapy · category RH012N
1 supplier22 claims22 services$12.68 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

Clinical Nurse Specialist
8940 N WOOD SAGE RD
PEORIA, IL 61615
Registered Nurse
8940 N WOOD SAGE RD
PEORIA, IL 61615
Internal Medicine (Hematology & Oncology)
8940 N WOOD SAGE RD
PEORIA, IL 61615
Pharmacy (Community/Retail Pharmacy)
8940 N WOOD SAGE RD
PEORIA, IL 61615
Internal Medicine (Hematology & Oncology)
8940 N WOOD SAGE RD
PEORIA, IL 61615
Internal Medicine (Hematology & Oncology)
8940 N WOOD SAGE RD
PEORIA, IL 61615
Internal Medicine (Hematology & Oncology)
8940 N WOOD SAGE RD
PEORIA, IL 61615
Clinical Nurse Specialist
8940 N WOOD SAGE RD
PEORIA, IL 61615

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 Gerstner's NPI number?

The NPI number for Gregory Gerstner is 1629288659. It was assigned to this individual provider in the NPPES registry on May 22, 2007.

Where is Gregory Gerstner located?

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

What is Gregory Gerstner's specialty?

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

Is Gregory Gerstner enrolled in Medicare?

Yes. Gregory Gerstner is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Gregory Gerstner affiliated with any hospitals?

According to CMS data, Gregory Gerstner is affiliated with Saint Francis Medical Center, Osf Saint Elizabeth Mdl Ctr, Methodist Medical Center Of Illinois, Osf Saint Paul Medical Center and Osf Saint Clare Medical Center.

When was this NPI record last updated?

The NPPES record for Gregory Gerstner was last updated on March 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months 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.