NPI registry status
Active
2026 NPPES data Rheumatology Physician NPI 1558789396
Verify on CMS → Emilie Chan
Rheumatology Physician in New York, 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 6,181 in Rheumatology 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
588
Medicare Part D claims · 63 beneficiaries · Rheumatology Physician avg: 2K
Generic prescribing
81%
generic claims · 19% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$14.36
1 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
Emilie Chan filed 588 Medicare Part D claims in 2023 as a Rheumatology Physician in New York, New York, prescribing 81% generic.
- 588
- Part D claims, 2023
- 81%
- 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.
Emilie Chan's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
588 Top 34% higher than 66% 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)
Emilie Chan practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - 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 Emilie Chan?
Quality data not reportedPrimary specialty
Rheumatology Physician
Medicare Part D claims
588 71% vs specialty avg
Specialty distribution in New York
How Rheumatology 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 Rheumatology 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).
Emilie Chan appears in the CMS NPPES registry as a Rheumatology Physician provider at 1 GUSTAVE L LEVY PL, New York, NY, 10029, with a listed phone of (212) 659-8551. NPI 1558789396 was issued on 03/30/2014.
Medicare Part D records for calendar year 2023 show 588 prescription claims written by this provider, covering 63 Medicare beneficiaries and totaling roughly $656K in drug spend, split 19% brand-name and 81% generic by claim count.
Rheumatology Physician is a mid-sized specialty nationwide, with 6,181 enrolled providers across 52 states and an average of 2,054 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 | 1558789396 |
|---|---|
| Specialty | Rheumatology Physician |
| Gender | Female |
| NPI Issued | 03/30/2014 |
Hospital and facility affiliations
Facilities where Emilie Chan 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.
Icahn School OF Medicine AT Mount Sinai
Elmhurst, NY
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 Emilie Chan. Source: openpaymentsdata.cms.gov.
Total received
$14
Largest payer
GlaxoSmithKline, LLC.
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 Emilie Chan. To verify Emilie Chan'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
Emilie Chan - brand share 19.0%
Rheumatology Physician average
19% brand-name claims vs 81% generic, on 588 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.
588
Total Claims
$656K
Total Drug Cost
63
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,147
- Total Day Supply
- 33,516
- Brand vs Generic
- 19% brand / 81% generic
- Brand Drug Cost
- $624K
- Generic Drug Cost
- $32K
Patient Demographics
- Average Patient Age
- 69.8 years
- Avg HCC Risk Score
- 1.29
- Gender Split
- 78% female / 22% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Emilie Chan prescribes most
Top Medicare Part D drugs by claim count, 2023
- Methotrexate
Methotrexate
75 claims
- Prednisone
Prednisone
60 claims
- Hydroxychloroquine…
Hydroxychloroquine Sulfate
51 claims
- Folic Acid
Folic Acid
49 claims
- Leucovorin Calcium
Leucovorin Calcium
35 claims
- Sulfasalazine
Sulfasalazine
31 claims
- Colchicine 26
Colchicine
26 claims
- Diclofenac Sodium 23
Diclofenac Sodium
23 claims
| Drug | Claims |
|---|---|
| Methotrexate Methotrexate Sodium | 75 |
| Prednisone | 60 |
| Hydroxychloroquine Sulfate | 51 |
| Folic Acid | 49 |
| Leucovorin Calcium | 35 |
| Sulfasalazine | 31 |
| Colchicine | 26 |
| Diclofenac Sodium | 23 |
| Ibuprofen | 18 |
| Actemra Actpen Tocilizumab | 17 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Rheumatology Physician Overview
How Emilie Chan fits within the Rheumatology Physician landscape nationally.
6,181
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,054
Avg Claims per Provider
Emilie Chan's 588 claims are below the specialty average of 2,054.
Nearby Rheumatology 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. Mary Abdulky
MD
Syracuse, NY
Dr. Ilana Abeles
M.D., PHD
Rochester, NY
Dr. Jihad Abialmouna
M.D.
West Amherst, NY
Dr. Omar Abialmouna
MD
Buffalo, NY
Dr. Irina Abramova
D.O
New Hyde Park, NY
Compare Rheumatology 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 Rheumatology 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore New York
Frequently Asked Questions
What is Emilie Chan's specialty? ▼
Emilie Chan specializes in Rheumatology Physician and practices in New York, New York.
How much does Emilie Chan prescribe under Medicare Part D? ▼
In 2023, Emilie Chan wrote 588 Medicare Part D claims totaling $656K in drug costs for 63 beneficiaries.
Where is Emilie Chan located? ▼
Emilie Chan is located at 1 GUSTAVE L LEVY PL, New York, NY, 10029. Phone: (212) 659-8551.
What is Emilie Chan's NPI number? ▼
Emilie Chan's National Provider Identifier (NPI) is 1558789396, issued on 03/30/2014.
Does Emilie Chan prescribe more brand-name or generic drugs? ▼
Emilie Chan's prescribing is 19% brand-name and 81% generic drugs by claim count, with $624K in brand drug costs.
How many Rheumatology Physician providers are there in the US? ▼
There are 6,181 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,054 Medicare Part D claims per year.
What drugs does Emilie Chan prescribe most often? ▼
Based on 2023 Medicare Part D data, Emilie Chan's most frequently prescribed drugs include Methotrexate, Prednisone, Hydroxychloroquine Sulfate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Emilie Chan accept Medicare? ▼
Emilie Chan appears in CMS Medicare data with 588 Part D claims and 63 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Emilie Chan's credentials? ▼
Emilie Chan's NPI is 1558789396. 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.