Robert Siegel, MD
NPI 1518901545 · Medical Oncology Physician · Alton, IL
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Siegel, MD is a Medical Oncology Physician provider in Alton, IL (NPI 1518901545).
Provider details
- NPI number
- 1518901545
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2022039164 (MO)
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 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
583 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 138 | $83 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 136 | $118 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 117 | $92 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 45 | $150 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 44 | $62 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prochlorperazine Maleate | 36 | 29 |
| Prednisone | 34 | 11 |
| Ondansetron Hcl | 30 | 24 |
| Apixabanbrand: Eliquis | 29 | 11 |
| Anastrozole | 23 | — |
| Potassium Chloride | 19 | — |
| Dexamethasone | 18 | 15 |
| Abiraterone Acetate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$122 across 6 records (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
- 2006-06-16
- Last updated
- 2025-04-21
- Certified
- 2024-09-19
Frequently asked questions
- What is Robert Siegel's NPI number?
- Robert Siegel's National Provider Identifier (NPI) is 1518901545, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Siegel's specialty?
- Robert Siegel is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Siegel located?
- Robert Siegel's practice location on file with NPPES is 1 Memorial Dr, Alton, IL 62002-6722.
- What is Robert Siegel's phone number?
- The practice phone number listed in the NPPES registry for Robert Siegel is (800) 647-2098.
- Does Robert Siegel accept Medicare?
- Robert Siegel is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Siegel's NPI active?
- Yes — Robert Siegel's NPI (1518901545) is active in the NPPES registry as of the last update on 2025-04-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.