Leonard Giannone, MD
NPI 1245297571 · Hematology & Oncology Physician · Springfield, IL
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leonard Giannone, MD is a Hematology & Oncology Physician provider in Springfield, IL (NPI 1245297571).
Provider details
- NPI number
- 1245297571
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036061203 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
707 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 372 | $127 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 102 | $59 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 69 | $90 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 63 | $122 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 45 | $14 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 69 | 19 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 33 | — |
| Lenalidomidebrand: Revlimid | 27 | — |
| Ibrutinibbrand: Imbruvica | 25 | — |
| Prednisone | 20 | — |
| Ruxolitinib Phosphatebrand: Jakafi | 20 | — |
| Apixaban |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$22 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-28
- Last updated
- 2020-05-22
- Certified
- 2020-05-22
Frequently asked questions
- What is Leonard Giannone's NPI number?
- Leonard Giannone's National Provider Identifier (NPI) is 1245297571, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leonard Giannone's specialty?
- Leonard Giannone is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Leonard Giannone located?
- Leonard Giannone's practice location on file with NPPES is 900 N. 1st Street, Springfield, IL 62702-3749.
- What is Leonard Giannone's phone number?
- The practice phone number listed in the NPPES registry for Leonard Giannone is (217) 528-7541.
- Does Leonard Giannone accept Medicare?
- Leonard Giannone is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leonard Giannone's NPI active?
- Yes — Leonard Giannone's NPI (1245297571) is active in the NPPES registry as of the last update on 2020-05-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.