Eileen Pentony, MD
NPI 1659437457 · Internal Medicine Physician · Downers Grove, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Eileen Pentony, MD is a Internal Medicine Physician provider in Downers Grove, IL (NPI 1659437457).
Provider details
- NPI number
- 1659437457
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036107986 (IL)
Specialties & taxonomies
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
3,957 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 505 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 368 | $10 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 291 | $133 |
| Hemoglobin A1c Level83036 | 290 | $10 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 283 | $16 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 271 | $13 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 98 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 516 | 143 |
| Levothyroxine Sodium | 435 | 117 |
| Losartan Potassium | 263 | 67 |
| Amlodipine Besylate | 219 | 64 |
| Hydrochlorothiazide | 194 | 56 |
| Lisinopril | 187 | 48 |
| Simvastatin | 167 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-28
- Last updated
- 2023-08-17
- Certified
- 2023-08-17
Frequently asked questions
- What is Eileen Pentony's NPI number?
- Eileen Pentony's National Provider Identifier (NPI) is 1659437457, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Eileen Pentony's specialty?
- Eileen Pentony is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Eileen Pentony located?
- Eileen Pentony's practice location on file with NPPES is 5207 Main St, Downers Grove, IL 60515-4652.
- What is Eileen Pentony's phone number?
- The practice phone number listed in the NPPES registry for Eileen Pentony is (630) 435-9888.
- Does Eileen Pentony accept Medicare?
- Eileen Pentony is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Eileen Pentony's NPI active?
- Yes — Eileen Pentony's NPI (1659437457) is active in the NPPES registry as of the last update on 2023-08-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.