NPI registry status
Active
2026 NPPES data Hospitalist Physician NPI 1538173869 M.D.
Verify on CMS → Il Chon, M.D.
Hospitalist Physician in Ephrata, Pennsylvania.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,825 in Hospitalist Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
4K
Medicare Part D claims · 494 beneficiaries · Hospitalist Physician avg: 888
Generic prescribing
87%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$402.72
21 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Il Chon, M.D. filed 4,267 Medicare Part D claims in 2023 as a Hospitalist Physician in Ephrata, Pennsylvania, prescribing 87% generic.
- 4K
- Part D claims, 2023
- 87%
- generic prescribing
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Il Chon, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
4,267 Top 8% higher than 92% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Il Chon, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Il Chon, M.D.?
Quality data not reportedPrimary specialty
Hospitalist Physician
Medicare Part D claims
4,267 381% vs specialty avg
Specialty distribution in Pennsylvania
How Hospitalist Physician compares to other specialties among Pennsylvania providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Hospitalist Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Il Chon, M.D. appears in the CMS NPPES registry as a Hospitalist Physician provider holding M.D. credentials at 446 N READING RD, Ephrata, PA, 17522, with a listed phone of (717) 733-6546. NPI 1538173869 was issued on 07/29/2006.
Medicare Part D records for calendar year 2023 show 4,267 prescription claims written by this provider, covering 494 Medicare beneficiaries and totaling roughly $503K in drug spend, split 12% brand-name and 87% generic by claim count, with an opioid prescribing rate of 4.5%.
Hospitalist Physician is a mid-sized specialty nationwide, with 16,825 enrolled providers across 54 states and an average of 888 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1538173869 |
|---|---|
| Specialty | Hospitalist Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/29/2006 |
Hospital and facility affiliations
Facilities where Il Chon, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Elizabethtown Community Hospital
★★★★☆ 4/5
Elizabethtown, NY
Critical Access Hospitals
CMS CCN: 331302
University OF Vermont Medical Center Inc
Essex Junction, VT
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Il Chon, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$403
Largest payer
Novo Nordisk Inc
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - Pennsylvania PA-BOM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~45K Pennsylvania medical licensees in 2023 - they are NOT specific to Il Chon, M.D.. To verify Il Chon, M.D.'s current license status, search the PA-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
133
Total board actions, Pennsylvania 2023
Across 129 cases
2.96
Actions per 1,000 licensees
Pennsylvania statewide rate
probation
Most common action type
48 cases
PA-BOM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Pennsylvania disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Il Chon, M.D. - brand share 12.0%
Hospitalist Physician average
12% brand-name claims vs 87% generic, on 4,267 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
4,267
Total Claims
$503K
Total Drug Cost
494
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 8,790
- Total Day Supply
- 251,941
- Brand vs Generic
- 12% brand / 87% generic
- Brand Drug Cost
- $421K
- Generic Drug Cost
- $79K
- Opioid Claims
- 193 (4.5% rate)
- Antibiotic Claims
- 150
Patient Demographics
- Average Patient Age
- 71.5 years
- Avg HCC Risk Score
- 1.21
- Gender Split
- 54% female / 46% male
- Age Distribution
- <65: 98, 65-74: 187, 75-84: 148, 85+: 61
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Il Chon, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Lisinopril
Lisinopril
196 claims
- Omeprazole
Omeprazole
168 claims
- Atorvastatin Calcium
Atorvastatin Calcium
156 claims
- Amlodipine Besylate
Amlodipine Besylate
144 claims
- Levothyroxine Sodium
Levothyroxine Sodium
132 claims
- Losartan Potassium
Losartan Potassium
122 claims
- Sertraline Hcl
Sertraline Hcl
105 claims
- Simvastatin
Simvastatin
97 claims
| Drug | Claims |
|---|---|
| Lisinopril | 196 |
| Omeprazole | 168 |
| Atorvastatin Calcium | 156 |
| Amlodipine Besylate | 144 |
| Levothyroxine Sodium | 132 |
| Losartan Potassium | 122 |
| Sertraline Hcl | 105 |
| Simvastatin | 97 |
| Hydrochlorothiazide | 80 |
| Metoprolol Tartrate | 77 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Hospitalist Physician Overview
How Il Chon, M.D. fits within the Hospitalist Physician landscape nationally.
16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider
Il Chon, M.D.'s 4,267 claims are above the specialty average of 888.
Nearby Hospitalist Physician Providers in Pennsylvania
Other clinicians with the same primary specialty enrolled in Pennsylvania, drawn from the same CMS NPPES roster as Chon.
Dr. Mohamed Abdelnaby
MD
Allentown, PA
Dr. Waheed Abdul
MD
Wilkes Barre, PA
Dr. Fnu Abhishek
MD
Greensburg, PA
Dr. Andrew Abouzeid
DO
Hershey, PA
Dr. Bharat Adroja
M.D.
Lock Haven, PA
Compare Hospitalist Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Pennsylvania medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Hospitalist Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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How insurance networks affect your costs
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Frequently Asked Questions
What is Il Chon, M.D.'s specialty? ▼
Il Chon, M.D. specializes in Hospitalist Physician and practices in Ephrata, Pennsylvania. Credentials: M.D..
How much does Il Chon, M.D. prescribe under Medicare Part D? ▼
In 2023, Il Chon, M.D. wrote 4,267 Medicare Part D claims totaling $503K in drug costs for 494 beneficiaries.
Where is Il Chon, M.D. located? ▼
Il Chon, M.D. is located at 446 N READING RD, Ephrata, PA, 17522. Phone: (717) 733-6546.
What is Il Chon, M.D.'s NPI number? ▼
Il Chon, M.D.'s National Provider Identifier (NPI) is 1538173869, issued on 07/29/2006.
Does Il Chon, M.D. prescribe more brand-name or generic drugs? ▼
Il Chon, M.D.'s prescribing is 12% brand-name and 87% generic drugs by claim count, with $421K in brand drug costs.
Does Il Chon, M.D. prescribe opioids? ▼
Yes, Il Chon, M.D. had 193 opioid claims in 2023 with an opioid prescribing rate of 4.5%.
How many Hospitalist Physician providers are there in the US? ▼
There are 16,825 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
What drugs does Il Chon, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Il Chon, M.D.'s most frequently prescribed drugs include Lisinopril, Omeprazole, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Il Chon, M.D. accept Medicare? ▼
Il Chon, M.D. appears in CMS Medicare data with 4,267 Part D claims and 494 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Il Chon, M.D.'s credentials? ▼
Il Chon, M.D.'s NPI is 1538173869 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.