NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1023003274 MD
Verify on CMS → Winny Ou, MD
Family Medicine Physician in South Easton, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 150,125 in Family 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
7K
Medicare Part D claims · 386 beneficiaries · Family Medicine Physician avg: 4K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$193.29
10 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Winny Ou, MD filed 6,883 Medicare Part D claims in 2024 as a Family Medicine Physician in South Easton, Massachusetts, prescribing 91% generic.
- 7K
- Part D claims, 2024
- 91%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥96th
- 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.
Federal trust snapshot
What official records show about Winny Ou, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1023003274), first enumerated 09/14/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 6,883 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$193.29 in reported industry payments (10 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Massachusetts statewide board action statistics are published annually — these figures describe aggregate state activity, not Winny Ou, MD's individual license status. Verify directly with the state medical board.
Source: BORIM annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1023003274 · Family Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1023003274
- ENUM-LEGACY 2005
- TAX-MEGA 150K Family Medicine
- RX-MID 6,883
- BOOK-LIGHT 2,226 in Massachusetts
- PHOTO-ENUM David Stewart · 2005
Winny Ou, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
6,883 ≥ 96th percentile 96% of 1,416,883 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 · 2024
✓
Board certification likely (heuristic, not verified)
Winny Ou, MD 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 Winny Ou, MD?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
6,883 96% vs specialty avg
Specialty distribution in Massachusetts
How Family Medicine Physician compares to other specialties among Massachusetts 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 Family 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).
Practice Address
Provider Details
| NPI | 1023003274 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 09/14/2005 |
Hospital and facility affiliations
Facilities where Winny Ou, MD 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.
Revere Medical OF Massachusetts PC
Brockton, MA
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 Winny Ou, MD. Source: openpaymentsdata.cms.gov.
Total received
$193
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 - Massachusetts BORIM 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 ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Winny Ou, MD. To verify Winny Ou, MD's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM 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 Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Winny Ou, MD - brand share 9.0%
Family Medicine Physician average
9% brand-name claims vs 91% generic, on 6,883 2024 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 2024.
6,883
Total Claims
$482K
Total Drug Cost
386
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 15,257.533
- Total Day Supply
- 440,647
- Brand vs Generic
- 9% brand / 91% generic
- Brand Drug Cost
- $379K
- Generic Drug Cost
- $101K
- Opioid Claims
- 208 (3.0% rate)
- Antibiotic Claims
- 273
Patient Demographics
- Average Patient Age
- 72.4 years
- Avg HCC Risk Score
- 1.06
- Gender Split
- 74% female / 26% male
- Age Distribution
- <65: 35, 65-74: 205, 75-84: 114, 85+: 32
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Winny Ou, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
593 claims
- Lisinopril
Lisinopril
456 claims
- Levothyroxine Sodium
Levothyroxine Sodium
319 claims
- Omeprazole
Omeprazole
284 claims
- Amlodipine Besylate 221
Amlodipine Besylate
221 claims
- Metoprolol Succinate 165
Metoprolol Succinate
165 claims
- Simvastatin 161
Simvastatin
161 claims
- Lorazepam 130
Lorazepam
130 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 593 |
| Lisinopril | 456 |
| Levothyroxine Sodium | 319 |
| Omeprazole | 284 |
| Amlodipine Besylate | 221 |
| Metoprolol Succinate | 165 |
| Simvastatin | 161 |
| Lorazepam | 130 |
| Hydrochlorothiazide | 118 |
| Gabapentin | 115 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How Winny Ou, MD fits within the Family Medicine Physician landscape nationally.
150,125
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,519
Avg Claims per Provider
Winny Ou, MD's 6,883 claims are above the specialty average of 3,519.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Ou, both outside Massachusetts so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Ou.
One of 2,226 Family Medicine Physician providers enrolled in Massachusetts, 5 are shown here.
Dr. Salah Abass
M.D.
Methuen, MA
Dr. Sheila Abdallah
MD
Worcester, MA
Dr. Jonathan Abel
DO
Springfield, MA
Dr. Mohamed Abib
MD
Sturbridge, MA
Dr. Kevin Abraham
M.D.
Worcester, MA
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Winny Ou, MD's specialty? ▼
Winny Ou, MD specializes in Family Medicine Physician and practices in South Easton, Massachusetts. Credentials: MD.
How much does Winny Ou, MD prescribe under Medicare Part D? ▼
In 2024, Winny Ou, MD wrote 6,883 Medicare Part D claims totaling $482K in drug costs for 386 beneficiaries.
Where is Winny Ou, MD located? ▼
Winny Ou, MD is located at 21 BRISTOL DR, South Easton, MA, 02375. Phone: (508) 565-7300.
What is Winny Ou, MD's NPI number? ▼
Winny Ou, MD's National Provider Identifier (NPI) is 1023003274, issued on 09/14/2005.
Does Winny Ou, MD prescribe more brand-name or generic drugs? ▼
Winny Ou, MD's prescribing is 9% brand-name and 91% generic drugs by claim count, with $379K in brand drug costs.
Does Winny Ou, MD prescribe opioids? ▼
Yes, Winny Ou, MD had 208 opioid claims in 2024 with an opioid prescribing rate of 3.0%.
How many Family Medicine Physician providers are there in the US? ▼
There are 150,125 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,519 Medicare Part D claims per year.
What drugs does Winny Ou, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Winny Ou, MD's most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Winny Ou, MD accept Medicare? ▼
Winny Ou, MD appears in CMS Medicare data with 6,883 Part D claims and 386 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Winny Ou, MD's credentials? ▼
Winny Ou, MD's NPI is 1023003274 with credentials MD. 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.