NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1891010286 D.O.
Verify on CMS → York Sing Chan, D.O.
Internal Medicine Physician in Brooklyn, 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 172,858 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
21K
Medicare Part D claims · 775 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
79%
generic claims · 19% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.3K
62 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
York Sing Chan, D.O. filed 20,911 Medicare Part D claims in 2023 as a Internal Medicine Physician in Brooklyn, New York, prescribing 79% generic.
- 21K
- Part D claims, 2023
- 79%
- generic prescribing
- $1.3K
- industry payments (Sunshine Act)
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.
York Sing Chan, D.O.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
20,911 Top 2% higher than 98% 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)
York Sing Chan, D.O. 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 York Sing Chan, D.O.?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
20,911 8× 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).
York Sing Chan, D.O. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding D.O. credentials at 2116 AVENUE U, Brooklyn, NY, 11229, with a listed phone of (718) 616-1535. NPI 1891010286 was issued on 03/29/2010.
Medicare Part D records for calendar year 2023 show 20,911 prescription claims written by this provider, covering 775 Medicare beneficiaries and totaling roughly $4.2 million in drug spend, split 19% brand-name and 79% generic by claim count, with an opioid prescribing rate of 0.1%.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 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 | 1891010286 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | D.O. |
| Gender | Male |
| NPI Issued | 03/29/2010 |
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 York Sing Chan, D.O.. Source: openpaymentsdata.cms.gov.
Total received
$1.3K
Largest payer
AstraZeneca Pharmaceuticals LP
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 - 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 York Sing Chan, D.O.. To verify York Sing Chan, D.O.'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
York Sing Chan, D.O. - brand share 19.0%
Internal Medicine Physician average
19% brand-name claims vs 79% generic, on 20,911 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.
20,911
Total Claims
$4.2M
Total Drug Cost
775
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 36,671
- Total Day Supply
- 1,072,804
- Brand vs Generic
- 19% brand / 79% generic
- Brand Drug Cost
- $3.3M
- Generic Drug Cost
- $838K
- Opioid Claims
- 25 (0.1% rate)
- Antibiotic Claims
- 388
Patient Demographics
- Average Patient Age
- 73.3 years
- Avg HCC Risk Score
- 0.98
- Gender Split
- 56% female / 44% male
- Age Distribution
- <65: 47, 65-74: 425, 75-84: 210, 85+: 93
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What York Sing Chan, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Amlodipine Besylate
Amlodipine Besylate
928 claims
- Atorvastatin Calcium
Atorvastatin Calcium
788 claims
- Diclofenac Epolamine
Diclofenac Epolamine
757 claims
- Metoprolol Succinate
Metoprolol Succinate
638 claims
- Simvastatin
Simvastatin
620 claims
- Losartan Potassium
Losartan Potassium
582 claims
- Diclofenac Sodium
Diclofenac Sodium
558 claims
- Metformin Hcl
Metformin Hcl
513 claims
| Drug | Claims |
|---|---|
| Amlodipine Besylate | 928 |
| Atorvastatin Calcium | 788 |
| Diclofenac Epolamine | 757 |
| Metoprolol Succinate | 638 |
| Simvastatin | 620 |
| Losartan Potassium | 582 |
| Diclofenac Sodium | 558 |
| Metformin Hcl | 513 |
| Vascepa Icosapent Ethyl | 490 |
| Ammonium Lactate | 403 |
* 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 York Sing Chan, D.O. fits within the Internal Medicine Physician landscape nationally.
172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
York Sing Chan, D.O.'s 20,911 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 Chan.
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 York Sing Chan, D.O.'s specialty? ▼
York Sing Chan, D.O. specializes in Internal Medicine Physician and practices in Brooklyn, New York. Credentials: D.O..
How much does York Sing Chan, D.O. prescribe under Medicare Part D? ▼
In 2023, York Sing Chan, D.O. wrote 20,911 Medicare Part D claims totaling $4.2M in drug costs for 775 beneficiaries.
Where is York Sing Chan, D.O. located? ▼
York Sing Chan, D.O. is located at 2116 AVENUE U, Brooklyn, NY, 11229. Phone: (718) 616-1535.
What is York Sing Chan, D.O.'s NPI number? ▼
York Sing Chan, D.O.'s National Provider Identifier (NPI) is 1891010286, issued on 03/29/2010.
Does York Sing Chan, D.O. prescribe more brand-name or generic drugs? ▼
York Sing Chan, D.O.'s prescribing is 19% brand-name and 79% generic drugs by claim count, with $3.3M in brand drug costs.
Does York Sing Chan, D.O. prescribe opioids? ▼
Yes, York Sing Chan, D.O. had 25 opioid claims in 2023 with an opioid prescribing rate of 0.1%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,858 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 York Sing Chan, D.O. prescribe most often? ▼
Based on 2023 Medicare Part D data, York Sing Chan, D.O.'s most frequently prescribed drugs include Amlodipine Besylate, Atorvastatin Calcium, Diclofenac Epolamine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does York Sing Chan, D.O. accept Medicare? ▼
York Sing Chan, D.O. appears in CMS Medicare data with 20,911 Part D claims and 775 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify York Sing Chan, D.O.'s credentials? ▼
York Sing Chan, D.O.'s NPI is 1891010286 with credentials D.O.. 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.