Doctor profile · Federal record
Dr. Marie Oconnor Parker, MD
Emergency Medicine Physician (CMS: Emergency Medicine) · Emergency Medicine Physician · Lemont, IL
- NPI 1528035789
- Accepts Medicare
- 27 yrs in practice
- Licensed in 2 states
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 3 locations .
- Primary practice
-
15900 W 127Th St
Lemont, IL 604392910
(630) 243-7100 - Additional location
-
6840 Main St
Downers Grove, IL 605163425
(630) 275-6840 - Additional location
-
885 Roosevelt RD Ste 100
Glen Ellyn, IL 601376141
(630) 938-6000
fax (630) 384-6229 - Mailing address
-
Po Box 95305
Chicago, IL 606945305
Credentials & registration
- NPI registered
- March 2006 — 20 yrs on file
- Profile last updated
- October 24, 2025
- Year of graduation
- 1999 — 27 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State licenses (2)
- Illinois #036106251 · Minnesota #46599
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1528035789. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
131
Distinct HCPCS
4
Medicare allowed
$17,751
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 49 | 48 | $133 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 40 | 40 | $174 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 27 | 26 | $94 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 15 | 15 | $118 |
In context: peer comparison
Among 1 peers in Lemont Emergency Medicine Physician, average services per provider: 32. This provider delivers 4.1× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
101
Patients
89
Total drug cost
$1,286
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Azithromycin | Generic | 22 | 21 | $128 |
| Methylprednisolone | Generic | 19 | 19 | $222 |
| Prednisone | Generic | 15 | 15 | $38 |
| Albuterol Sulfate Hfa (Albuterol Sulfate) | Brand | 12 | 12 | $441 |
| Cephalexin | Generic | 11 | 11 | $48 |
| Losartan Potassium | Generic | 11 | 0 | $313 |
| Mupirocin | Generic | 11 | 11 | $96 |
Hospital affiliations
Frequently asked questions
What is Dr. Marie Oconnor Parker's medical specialty?
Dr. Marie Oconnor Parker practices Emergency Medicine Physician in Lemont, IL.
Where does Dr. Marie Oconnor Parker practice?
Dr. Marie Oconnor Parker practices at 15900 W 127Th St, Lemont, IL 604392910. Office phone: 6302437100.
What is Dr. Marie Oconnor Parker's NPI?
Dr. Marie Oconnor Parker's National Provider Identifier (NPI) is 1528035789, issued by NPPES.
Does Dr. Marie Oconnor Parker accept Medicare assignment?
Yes. Dr. Marie Oconnor Parker accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Marie Oconnor Parker commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); New patient office or other outpatient visit (HCPCS 99204); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.