Marie Oconnor Parker, MD
NPI 1528035789 · Emergency Medicine Physician · Lemont, IL
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Provider details
- NPI number
- 1528035789
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 46599 (MN)
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 tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 documented practice locations
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Atorvastatin Calcium | 33 |
| Metformin Hcl | 29 |
| Tirzepatidebrand: Mounjaro | 26 |
| Rosuvastatin Calcium | 25 |
| Levothyroxine Sodium | 21 |
| Losartan Potassium | 19 |
| Lisinopril | 17 |
| Allopurinol | 15 |
| Amlodipine Besylate |
Practice location
Mailing address
Additional practice locations (2)
- 6840 Main StDowners Grove, IL 60516-3425Phone: (630) 275-6840
- 885 Roosevelt Rd Ste 100Glen Ellyn, IL 60137-6141Phone: (630) 938-6000Fax: (630) 384-6229
Registry dates
- Enumerated
- 2006-03-07
- Last updated
- 2025-10-24
- Certified
- 2025-10-24
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.