NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1780881680
Verify on CMS → Chun Chen
Internal Medicine Physician in Smithtown, New York.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 in Internal Medicine 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
3K
Medicare Part D claims · 215 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
87%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Chun Chen filed 3,418 Medicare Part D claims in 2023 as an Internal Medicine Physician in Smithtown, New York, prescribing 87% generic.
- 3K
- Part D claims, 2023
- 87%
- generic prescribing
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.
Chun Chen's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
3,418 Top 10% higher than 90% 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-eligible specialty (heuristic, not verified)
Chun Chen practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Chun Chen?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
3,418 26% vs specialty avg
Specialty distribution in New York
How Internal Medicine Physician compares to other specialties among New York 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 Internal Medicine 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).
Chun Chen appears in the CMS NPPES registry as an Internal Medicine Physician provider at 278 E MAIN ST STE A, Smithtown, NY, 11787, with a listed phone of (631) 366-4550. NPI 1780881680 was issued on 07/02/2007.
Medicare Part D records for calendar year 2023 show 3,418 prescription claims written by this provider, covering 215 Medicare beneficiaries and totaling roughly $499K in drug spend, split 11% brand-name and 87% generic by claim count, with an opioid prescribing rate of 1.6%.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 enrolled providers across 56 states and an average of 2,716 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 | 1780881680 |
|---|---|
| Specialty | Internal Medicine Physician |
| Gender | Female |
| NPI Issued | 07/02/2007 |
License & disciplinary context - New York NYSBPMC 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 ~100K New York medical licensees in 2023 - they are NOT specific to Chun Chen. To verify Chun Chen's current license status, search the NYSBPMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
312
Total board actions, New York 2023
Across 302 cases
3.12
Actions per 1,000 licensees
New York statewide rate
probation
Most common action type
89 cases
NYSBPMC 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 New York disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Chun Chen - brand share 11.0%
Internal Medicine Physician average
11% brand-name claims vs 87% generic, on 3,418 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.
3,418
Total Claims
$499K
Total Drug Cost
215
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 8,325
- Total Day Supply
- 241,303
- Brand vs Generic
- 11% brand / 87% generic
- Brand Drug Cost
- $415K
- Generic Drug Cost
- $82K
- Opioid Claims
- 56 (1.6% rate)
- Antibiotic Claims
- 166
Patient Demographics
- Average Patient Age
- 72.7 years
- Avg HCC Risk Score
- 0.97
- Gender Split
- 47% female / 53% male
- Age Distribution
- <65: 24, 65-74: 98, 75-84: 74, 85+: 19
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Chun Chen prescribes most
Top Medicare Part D drugs by claim count, 2023
- Amlodipine Besylate
Amlodipine Besylate
216 claims
- Atorvastatin Calcium
Atorvastatin Calcium
144 claims
- Losartan Potassium
Losartan Potassium
139 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
121 claims
- Metoprolol Succinate
Metoprolol Succinate
100 claims
- Levothyroxine Sodium
Levothyroxine Sodium
92 claims
- Montelukast Sodium 85
Montelukast Sodium
85 claims
- Metformin Hcl Er 84
Metformin Hcl Er
84 claims
| Drug | Claims |
|---|---|
| Amlodipine Besylate | 216 |
| Atorvastatin Calcium | 144 |
| Losartan Potassium | 139 |
| Rosuvastatin Calcium | 121 |
| Metoprolol Succinate | 100 |
| Levothyroxine Sodium | 92 |
| Montelukast Sodium | 85 |
| Metformin Hcl Er Metformin Hcl | 84 |
| Lisinopril | 77 |
| Azithromycin | 72 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Chun Chen fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Chun Chen's 3,418 claims are above the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in New York
Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Chen.
Dr. Deborah Aanonsen
D.O.
Staten Island, NY
Dr. Nivedita Aanur
M.D.
New York, NY
Dr. Jay Aaron
MD
Great Neck, NY
Dr. Justin Aaron
MD
New York, NY
Ahmad Abadi
Poughkeepsie, NY
Compare Internal Medicine 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 New York medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Internal Medicine 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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Frequently Asked Questions
What is Chun Chen's specialty? ▼
Chun Chen specializes in Internal Medicine Physician and practices in Smithtown, New York.
How much does Chun Chen prescribe under Medicare Part D? ▼
In 2023, Chun Chen wrote 3,418 Medicare Part D claims totaling $499K in drug costs for 215 beneficiaries.
Where is Chun Chen located? ▼
Chun Chen is located at 278 E MAIN ST STE A, Smithtown, NY, 11787. Phone: (631) 366-4550.
What is Chun Chen's NPI number? ▼
Chun Chen's National Provider Identifier (NPI) is 1780881680, issued on 07/02/2007.
Does Chun Chen prescribe more brand-name or generic drugs? ▼
Chun Chen's prescribing is 11% brand-name and 87% generic drugs by claim count, with $415K in brand drug costs.
Does Chun Chen prescribe opioids? ▼
Yes, Chun Chen had 56 opioid claims in 2023 with an opioid prescribing rate of 1.6%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Chun Chen prescribe most often? ▼
Based on 2023 Medicare Part D data, Chun Chen's most frequently prescribed drugs include Amlodipine Besylate, Atorvastatin Calcium, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Chun Chen accept Medicare? ▼
Chun Chen appears in CMS Medicare data with 3,418 Part D claims and 215 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Chun Chen's credentials? ▼
Chun Chen's NPI is 1780881680. 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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.