NPI registry status
Active
2026 NPPES data Medical Physician Assistant NPI 1285630848 PA
Verify on CMS → Chaim Wanounou, PA
Medical Physician Assistant 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 40,580 in Medical Physician Assistant, 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 · 233 beneficiaries · Medical Physician Assistant avg: 1K
Generic prescribing
87%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$113.63
5 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Chaim Wanounou, PA filed 3,956 Medicare Part D claims in 2023 as a Medical Physician Assistant in Brooklyn, New York, prescribing 87% generic.
- 4K
- Part D claims, 2023
- 87%
- generic prescribing
- $113.63
- industry payments (Sunshine Act)
- ≥91st
- pct by Part D claim volume (lower-bound band)
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.
Chaim Wanounou, PA's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
3,956 ≥ 91st percentile 91% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Chaim Wanounou, PA?
Quality data not reportedPrimary specialty
Medical Physician Assistant
Medicare Part D claims
3,956 267% vs specialty avg
Specialty distribution in New York
How Medical Physician Assistant 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 Medical Physician Assistant. 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).
Chaim Wanounou, PA appears in the CMS NPPES registry as a Medical Physician Assistant provider holding PA credentials at 100 ROSS ST, Brooklyn, NY, 11211, with a listed phone of (718) 387-7628. NPI 1285630848 was issued on 06/28/2005.
Medicare Part D records for calendar year 2023 show 3,956 prescription claims written by this provider, covering 233 Medicare beneficiaries and totaling roughly $247K in drug spend, split 12% brand-name and 87% generic by claim count.
Medical Physician Assistant is a mid-sized specialty nationwide, with 40,580 enrolled providers across 55 states and an average of 1,077 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 | 1285630848 |
|---|---|
| Specialty | Medical Physician Assistant |
| Credentials | PA |
| Gender | Male |
| NPI Issued | 06/28/2005 |
Hospital and facility affiliations
Facilities where Chaim Wanounou, PA 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.
Finif Medical PC
Brooklyn, 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 Chaim Wanounou, PA. Source: openpaymentsdata.cms.gov.
Total received
$114
Largest payer
Exact Sciences Corporation
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 Chaim Wanounou, PA. To verify Chaim Wanounou, PA'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
Chaim Wanounou, PA - brand share 12.0%
Medical Physician Assistant average
12% brand-name claims vs 87% generic, on 3,956 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.
3,956
Total Claims
$247K
Total Drug Cost
233
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 4,268
- Total Day Supply
- 122,766
- Brand vs Generic
- 12% brand / 87% generic
- Brand Drug Cost
- $170K
- Generic Drug Cost
- $76K
- Antibiotic Claims
- 132
Patient Demographics
- Average Patient Age
- 71.2 years
- Avg HCC Risk Score
- 0.92
- Gender Split
- 55% female / 45% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Chaim Wanounou, PA prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
378 claims
- Levothyroxine Sodium
Levothyroxine Sodium
246 claims
- Amlodipine Besylate
Amlodipine Besylate
212 claims
- Metformin Hcl
Metformin Hcl
181 claims
- Metoprolol Succinate 148
Metoprolol Succinate
148 claims
- Lisinopril 139
Lisinopril
139 claims
- Sertraline Hcl 139
Sertraline Hcl
139 claims
- Tamsulosin Hcl 118
Tamsulosin Hcl
118 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 378 |
| Levothyroxine Sodium | 246 |
| Amlodipine Besylate | 212 |
| Metformin Hcl | 181 |
| Metoprolol Succinate | 148 |
| Lisinopril | 139 |
| Sertraline Hcl | 139 |
| Tamsulosin Hcl | 118 |
| Hydrochlorothiazide | 114 |
| Simvastatin | 108 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Medical Physician Assistant Overview
How Chaim Wanounou, PA fits within the Medical Physician Assistant landscape nationally.
40,580
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,077
Avg Claims per Provider
Chaim Wanounou, PA's 3,956 claims are above the specialty average of 1,077.
Nearby Medical Physician Assistant Providers in New York
Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Wanounou.
Dr. Yesid Abad
PA C
New York, NY
Dr. Vincent Abanilla
PA-C
Brooklyn, NY
Dr. Stella Abayeva
P.A.
Forest Hills, NY
Dr. Amina Abdela
PA-C
Latham, NY
Dr. Hanan Abdelrahman
PA-C
Brooklyn, NY
Compare Medical Physician Assistant 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 Medical Physician Assistant 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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Medical Specialties Explained
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Understanding Medicare Claims Data
What prescribing data reveals about a provider
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How insurance networks affect your costs
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Frequently Asked Questions
What is Chaim Wanounou, PA's specialty? ▼
Chaim Wanounou, PA specializes in Medical Physician Assistant and practices in Brooklyn, New York. Credentials: PA.
How much does Chaim Wanounou, PA prescribe under Medicare Part D? ▼
In 2023, Chaim Wanounou, PA wrote 3,956 Medicare Part D claims totaling $247K in drug costs for 233 beneficiaries.
Where is Chaim Wanounou, PA located? ▼
Chaim Wanounou, PA is located at 100 ROSS ST, Brooklyn, NY, 11211. Phone: (718) 387-7628.
What is Chaim Wanounou, PA's NPI number? ▼
Chaim Wanounou, PA's National Provider Identifier (NPI) is 1285630848, issued on 06/28/2005.
Does Chaim Wanounou, PA prescribe more brand-name or generic drugs? ▼
Chaim Wanounou, PA's prescribing is 12% brand-name and 87% generic drugs by claim count, with $170K in brand drug costs.
How many Medical Physician Assistant providers are there in the US? ▼
There are 40,580 Medical Physician Assistant providers across 55 states in the US. The average Medical Physician Assistant provider writes 1,077 Medicare Part D claims per year.
What drugs does Chaim Wanounou, PA prescribe most often? ▼
Based on 2023 Medicare Part D data, Chaim Wanounou, PA's most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Chaim Wanounou, PA accept Medicare? ▼
Chaim Wanounou, PA appears in CMS Medicare data with 3,956 Part D claims and 233 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Chaim Wanounou, PA's credentials? ▼
Chaim Wanounou, PA's NPI is 1285630848 with credentials PA. 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.