Il Jun Chon, M.D.
Internal Medicine Physician · Ephrata, PA
Il Jun Chon, M.D. is an internal medicine physician with a practice address in Ephrata, Pennsylvania, and NPI 1538173869, issued on Jul 29, 2006. Check the license (Pennsylvania MD073540L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Il Jun Chon
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD073540L PA
Self-reported in NPPES; status is on the state search - Practice location
- 446 N Reading RD, Ephrata, PA 17522
- Phone
- (717) 733-6546
- Enumerated
- Jul 29, 2006
- Record last updated
- Jan 20, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (717) 733-6010
- Medicaid ID
- 1842878 PA
- Medicare enrollment
- Enrolled (PECOS I20220518002401); accepts Medicare assignment
- Medical or professional school
- Medical College Of Pennsylvania, 1998
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 446 N Reading RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Arun Agrawal, MDPulmonary Disease Physician1932300241
- Ammar Alimam, MDCritical Care Medicine (Internal Medicine) Physician1770542946
- Lauren Arrick, CRNPFamily Nurse Practitioner1578222071
- Ericka Berger, MDFamily Medicine Physician1942251871
- Carol Blake, PA-CPhysician Assistant1538208533
- Gregory Brown, M.D.Pulmonary Disease Physician1881856334
Verify Il Jun Chon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD073540LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% more Medicare Part D claims than the average internal medicine physician in 2024
5,482 Medicare Part D claims for 531 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 251 claims were for opioids.
Most prescribed
- Omeprazole226 claims
- Atorvastatin Calcium218 claims
- Lisinopril176 claims
- Levothyroxine Sodium175 claims
- Losartan Potassium173 claims
- Amlodipine Besylate169 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: $402.72
21 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk 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
- Elizabethtown Community HospitalElizabethtown, NY · Critical Access Hospitals4 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.
Il Jun Chon among 7,300 internal medicine physician records in Pennsylvania
Il Jun Chon, M.D. is one of 7,300 internal medicine physician records with a practice address in Pennsylvania. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 64% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1998 · median 2008 among the 4,208 with a school on file
- Record last updated2012 · 56% 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 Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 internal medicine physician records list a practice address in Ephrata
They are 13 of the 574 NPPES records with a practice address in Ephrata, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Ephrata → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Shaimaa El Shaarawy, MD, PHD, MSEphrata, PA 175221215533187
- Beth Esterbrook, M.D.Ephrata, PA 175221437160736
- Traci Kohl, MDEphrata, PA 175221841206919
- William Loretan, DOEphrata, PA 175221245244565
- Abdul Majeed, MDEphrata, PA 175221720392012
- Marino Mallozzi, MDEphrata, PA 175221558377648
- Susanna Margaryan, MDEphrata, PA 175221225221930
- Richard Mellinger, M.D.Ephrata, PA 175221689680738
Common questions
What is Il Jun Chon, M.D.'s NPI number?
Il Jun Chon, M.D.'s National Provider Identifier (NPI) is 1538173869, issued on Jul 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Il Jun Chon, M.D. located?
The NPPES record lists a practice address at 446 N Reading RD, Ephrata, PA, 17522. Phone: (717) 733-6546. Providers update this record themselves, so call before visiting.
How can I verify Il Jun Chon, M.D.'s license?
NPPES lists Pennsylvania license number MD073540L, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Il Jun Chon, M.D. prescribe under Medicare Part D?
In 2024, Il Jun Chon, M.D. had 5,482 Medicare Part D claims for 531 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.