Jonathan C. Delew, M.D.
Internal Medicine Physician · Glen Ellyn, IL
Jonathan C. Delew, M.D. is an internal medicine physician with a practice address in Glen Ellyn, Illinois, and NPI 1629060710, issued on Aug 16, 2005. Check the license (Illinois 036071738, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Jonathan C. Delew
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036071738 IL
Self-reported in NPPES; status is on the state search - Practice location
- 430 Pennsylvania Ave, Glen Ellyn, IL 60137
- Phone
- (630) 469-9200
- Enumerated
- Aug 16, 2005
- Record last updated
- Aug 4, 2023
- Medicaid ID
- 036071738 IL
- Medicare enrollment
- Enrolled (PECOS I20100714000775); accepts Medicare assignment
- 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 430 Pennsylvania Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jonathan C. Delew 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 036071738Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.2 times the Medicare Part D claims of the average internal medicine physician in 2024
10,011 Medicare Part D claims for 852 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 83 claims were for opioids.
Most prescribed
- Atorvastatin Calcium794 claims
- Levothyroxine Sodium550 claims
- Amlodipine Besylate476 claims
- Metoprolol Succinate451 claims
- Lisinopril373 claims
- Losartan Potassium363 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: $71.44
3 payments; by number, the most common kind was food and beverage; the largest payer was Exact Sciences Corporation. 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.
Bills Medicare through 2 group practices
- Dupage Medical Group LtdSchaumburg, IL
- Select Rehabilitation, LLCGlenview, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jonathan C. Delew among 7,238 internal medicine physician records in Illinois
Jonathan C. Delew, M.D. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1984 · median 2003 among the 3,580 with a school on file
- Record last updated2023 · 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).
18 internal medicine physician records list a practice address in Glen Ellyn
They are 18 of the 684 NPPES records with a practice address in Glen Ellyn, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Glen Ellyn → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- John Baird, MDGlen Ellyn, IL 601371851555619
- Walter Briney, M.D.Glen Ellyn, IL 601371659365955
- Adelbert Duvel, MDGlen Ellyn, IL 601371275508772
- Stephen Gawne, MDGlen Ellyn, IL 601371497729537
- Rita Herzing, M.D.Glen Ellyn, IL 601371316103559
- Mary Kungl, M.D.Glen Ellyn, IL 601371437215076
- Thomas Marshall, M.D.Glen Ellyn, IL 601371043202054
- Carol Olmstead Miecznikowski, MDGlen Ellyn, IL 601371467429456
Common questions
What is Jonathan C. Delew, M.D.'s NPI number?
Jonathan C. Delew, M.D.'s National Provider Identifier (NPI) is 1629060710, issued on Aug 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan C. Delew, M.D. located?
The NPPES record lists a practice address at 430 Pennsylvania Ave, Glen Ellyn, IL, 60137. Phone: (630) 469-9200. Providers update this record themselves, so call before visiting.
How can I verify Jonathan C. Delew, M.D.'s license?
NPPES lists Illinois license number 036071738, 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 Jonathan C. Delew, M.D. prescribe under Medicare Part D?
In 2024, Jonathan C. Delew, M.D. had 10,011 Medicare Part D claims for 852 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.