Matthew Siegel, MD
NPI 1639333263 · Hematology & Oncology Physician · Naperville, IL
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Siegel, MD is a Hematology & Oncology Physician provider in Naperville, IL (NPI 1639333263).
Provider details
- NPI number
- 1639333263
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 125054173 (IL)
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
17 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
1,879 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) |
|---|---|---|
| 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 | 625 | $17 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 564 | $152 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 271 | $82 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 190 | $100 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 88 | $180 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 188 | 42 |
| Prednisone | 141 | 27 |
| Abiraterone Acetate | 105 | 13 |
| Acyclovir | 92 | 16 |
| Prochlorperazine Maleate | 56 | 23 |
| Rivaroxabanbrand: Xarelto | 50 | 14 |
| Gabapentin | 48 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$82 across 4 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
- 2008-07-14
- Last updated
- 2021-03-12
- Certified
- 2021-03-12
Frequently asked questions
- What is Matthew Siegel's NPI number?
- Matthew Siegel's National Provider Identifier (NPI) is 1639333263, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Siegel's specialty?
- Matthew Siegel is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Siegel located?
- Matthew Siegel's practice location on file with NPPES is 120 Spalding Dr Ste 111, Naperville, IL 60540-6766.
- What is Matthew Siegel's phone number?
- The practice phone number listed in the NPPES registry for Matthew Siegel is (630) 527-3788.
- Does Matthew Siegel accept Medicare?
- Matthew Siegel is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Siegel's NPI active?
- Yes — Matthew Siegel's NPI (1639333263) is active in the NPPES registry as of the last update on 2021-03-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.