Jeffrey Tomaszewski, MD
NPI 1831150036 · Internal Medicine Physician · Glen Ellyn, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jeffrey Tomaszewski, MD is a Internal Medicine Physician provider in Glen Ellyn, IL (NPI 1831150036).
Provider details
- NPI number
- 1831150036
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036112627 (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
1,348 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 164 | $9 |
| Blood Test, Clotting Time85610 | 132 | $4 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 129 | $132 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test85027 | 104 | $6 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 103 | $13 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 98 | $94 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 90 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 602 | 174 |
| Rosuvastatin Calcium | 529 | 154 |
| Amlodipine Besylate | 509 | 143 |
| Lisinopril | 367 | 101 |
| Losartan Potassium | 360 | 103 |
| Levothyroxine Sodium | 338 | 88 |
| Metformin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$95 across 5 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
- 2006-03-29
- Last updated
- 2011-01-27
Frequently asked questions
- What is Jeffrey Tomaszewski's NPI number?
- Jeffrey Tomaszewski's National Provider Identifier (NPI) is 1831150036, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jeffrey Tomaszewski's specialty?
- Jeffrey Tomaszewski is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jeffrey Tomaszewski located?
- Jeffrey Tomaszewski's practice location on file with NPPES is 430 Pennsylvania Ave, Glen Ellyn, IL 60137-4464.
- What is Jeffrey Tomaszewski's phone number?
- The practice phone number listed in the NPPES registry for Jeffrey Tomaszewski is (630) 469-9200.
- Does Jeffrey Tomaszewski accept Medicare?
- Jeffrey Tomaszewski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jeffrey Tomaszewski's NPI active?
- Yes — Jeffrey Tomaszewski's NPI (1831150036) is active in the NPPES registry as of the last update on 2011-01-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.