Gregory Gerstner, M.D.
NPI 1629288659 · Hematology & Oncology Physician · Peoria, IL
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Gerstner, M.D. is a Hematology & Oncology Physician provider in Peoria, IL (NPI 1629288659).
Provider details
- NPI number
- 1629288659
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- PG PERMIT# 80968 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
15,890 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 2,037 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 1,717 | $10 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 1,560 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,090 | $121 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 805 | $16 |
| Gammaglobulin (immune System Protein) Measurement |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 59 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Acyclovir | 226 | 61 |
| Levothyroxine Sodium | 211 | 50 |
| Dexamethasone | 208 | 67 |
| Prochlorperazine Maleate | 146 | 93 |
| Hydroxyurea | 139 | 29 |
| Prednisone | 132 | 47 |
| Ondansetron Hcl | 123 | 82 |
| Apixaban |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-22
- Last updated
- 2026-03-02
- Certified
- 2026-03-02
Frequently asked questions
- What is Gregory Gerstner's NPI number?
- Gregory Gerstner's National Provider Identifier (NPI) is 1629288659, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Gerstner's specialty?
- Gregory Gerstner is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Gerstner located?
- Gregory Gerstner's practice location on file with NPPES is 8940 N Wood Sage Rd, Peoria, IL 61615-7822.
- What is Gregory Gerstner's phone number?
- The practice phone number listed in the NPPES registry for Gregory Gerstner is (309) 243-3000.
- Does Gregory Gerstner accept Medicare?
- Gregory Gerstner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Gerstner's NPI active?
- Yes — Gregory Gerstner's NPI (1629288659) is active in the NPPES registry as of the last update on 2026-03-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.