Ellen Therese Parker, MD
Internal Medicine Physician · Elmhurst, IL
Ellen Therese Parker, MD is an internal medicine physician with a practice address in Elmhurst, Illinois, and NPI 1295001907, issued on Mar 27, 2012. Check the license (Illinois 036137516, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Ellen Therese Parker
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036137516 IL
Self-reported in NPPES; status is on the state search - Practice location
- 300 N York St, Elmhurst, IL 60126
- Phone
- (708) 327-7030
- Enumerated
- Mar 27, 2012
- Record last updated
- Apr 30, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (630) 833-8834
- Medicare enrollment
- Enrolled (PECOS I20170623001614); accepts Medicare assignment
- Medical or professional school
- Creighton University School Of Medicine, 2012
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 300 N York St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brian Porter, MDInternal Medicine Physician1346982162
Verify Ellen Therese Parker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036137516Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% more Medicare Part D claims than the average internal medicine physician in 2024
3,807 Medicare Part D claims for 357 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 61 claims were for opioids.
Most prescribed
- Atorvastatin Calcium241 claims
- Amlodipine Besylate228 claims
- Losartan Potassium130 claims
- Lisinopril128 claims
- Levothyroxine Sodium118 claims
- Metoprolol Succinate112 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $70.52
1 payment: food and beverage; the largest payer was Medtronic, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
One hospital affiliation
- Loyola University Medical CenterMaywood, IL · Acute Care Hospitals2 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Ellen Therese Parker among 7,238 internal medicine physician records in Illinois
Ellen Therese Parker, MD is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 55% of them.
- NPI issued2012 · 55% of these records are older, 43% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2012 · median 2003 among the 3,580 with a school on file
- Record last updated2021 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
50 internal medicine physician records list a practice address in Elmhurst
They are 50 of the 1,540 NPPES records with a practice address in Elmhurst, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Elmhurst → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Maggie Chacko, MDElmhurst, IL 601261417993734
- Yolanda Co, M.D.Elmhurst, IL 601261811985054
- John Damergis, MDElmhurst, IL 601261750332896
- Richard Finegold, MD.Elmhurst, IL 601261770564122
- Michael Hugar, MDElmhurst, IL 601261558343913
- Joseph Kaliski, MDElmhurst, IL 601261235180381
- Michael Nosek, MDElmhurst, IL 601261598716656
- Patrick O'Meara, M.D.Elmhurst, IL 601261437127891
Common questions
What is Ellen Therese Parker, MD's NPI number?
Ellen Therese Parker, MD's National Provider Identifier (NPI) is 1295001907, issued on Mar 27, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Ellen Therese Parker, MD located?
The NPPES record lists a practice address at 300 N York St, Elmhurst, IL, 60126. Phone: (708) 327-7030. Providers update this record themselves, so call before visiting.
How can I verify Ellen Therese Parker, MD's license?
NPPES lists Illinois license number 036137516, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ellen Therese Parker, MD prescribe under Medicare Part D?
In 2024, Ellen Therese Parker, MD had 3,807 Medicare Part D claims for 357 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.