NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1619380920 DO
Verify on CMS → Michael Duffy, DO
Family Medicine Physician in Aliquippa, Pennsylvania.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,760 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
5K
Medicare Part D claims · 294 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
82%
generic claims · 18% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$22.12
1 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Michael Duffy, DO filed 5,491 Medicare Part D claims in 2023 as a Family Medicine Physician in Aliquippa, Pennsylvania, prescribing 82% generic.
- 5K
- Part D claims, 2023
- 82%
- generic prescribing
- $22.12
- industry payments (Sunshine Act)
- ≥94th
- 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.
CMS NPPES provider registry desk
NPI 1619380920 · Family Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · RX-MID · BOOK-MID · PHOTO-ENUM
- NPI-10 1619380920
- ENUM-MID 2014
- TAX-MEGA 148K Family Medicine
- RX-MID 5,491
- BOOK-MID 7,200 in Pennsylvania
- PHOTO-ENUM Tara Brockman · 2014
Michael Duffy, DO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
5,491 ≥ 94th percentile 94% 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
◑
Board-eligible specialty (heuristic, not verified)
Michael Duffy, DO 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 Michael Duffy, DO?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
5,491 61% vs specialty avg
Specialty distribution in Pennsylvania
How Family Medicine Physician compares to other specialties among Pennsylvania 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 | 1619380920 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 06/04/2014 |
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 Michael Duffy, DO. Source: openpaymentsdata.cms.gov.
Total received
$22
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 - Pennsylvania PA-BOM 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 ~45K Pennsylvania medical licensees in 2023 - they are NOT specific to Michael Duffy, DO. To verify Michael Duffy, DO's current license status, search the PA-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
133
Total board actions, Pennsylvania 2023
Across 129 cases
2.96
Actions per 1,000 licensees
Pennsylvania statewide rate
probation
Most common action type
48 cases
PA-BOM 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 Pennsylvania disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Michael Duffy, DO - brand share 18.0%
Family Medicine Physician average
18% brand-name claims vs 82% generic, on 5,491 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.
5,491
Total Claims
$871K
Total Drug Cost
294
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 10,219
- Total Day Supply
- 299,024
- Brand vs Generic
- 18% brand / 82% generic
- Brand Drug Cost
- $767K
- Generic Drug Cost
- $102K
- Opioid Claims
- 23 (0.4% rate)
- Antibiotic Claims
- 66
Patient Demographics
- Average Patient Age
- 64.3 years
- Avg HCC Risk Score
- 1.28
- Gender Split
- 58% female / 42% male
- Age Distribution
- <65: 118, 65-74: 123, 75-84: 38, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Michael Duffy, DO prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
339 claims
- Omeprazole
Omeprazole
244 claims
- Metformin Hcl
Metformin Hcl
235 claims
- Lisinopril
Lisinopril
220 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
216 claims
- Gabapentin
Gabapentin
208 claims
- Amlodipine Besylate
Amlodipine Besylate
178 claims
- Jardiance
Jardiance
157 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 339 |
| Omeprazole | 244 |
| Metformin Hcl | 235 |
| Lisinopril | 220 |
| Rosuvastatin Calcium | 216 |
| Gabapentin | 208 |
| Amlodipine Besylate | 178 |
| Jardiance Empagliflozin | 157 |
| Levothyroxine Sodium | 138 |
| Ibuprofen | 132 |
* 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 Michael Duffy, DO fits within the Family Medicine Physician landscape nationally.
147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
Michael Duffy, DO's 5,491 claims are above the specialty average of 3,418.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Duffy, both outside Pennsylvania so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2014)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in Pennsylvania
Other clinicians with the same primary specialty enrolled in Pennsylvania, drawn from the same CMS NPPES roster as Duffy.
One of 7,200 Family Medicine Physician providers enrolled in Pennsylvania, 5 are shown here.
Christopher Aaron
Cresson, PA
Dr. Jose Abad
MD
Pittsburgh, PA
Dr. Ray Abarintos
MD
Philadelphia, PA
Dr. Jasim Abbasi
DO
Erie, PA
Dr. Alyssa Abbott
CRNP
Hermitage, PA
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Michael Duffy, DO's specialty? ▼
Michael Duffy, DO specializes in Family Medicine Physician and practices in Aliquippa, Pennsylvania. Credentials: DO.
How much does Michael Duffy, DO prescribe under Medicare Part D? ▼
In 2023, Michael Duffy, DO wrote 5,491 Medicare Part D claims totaling $871K in drug costs for 294 beneficiaries.
Where is Michael Duffy, DO located? ▼
Michael Duffy, DO is located at 99 AUTUMN ST, Aliquippa, PA, 15001. Phone: (724) 375-5754.
What is Michael Duffy, DO's NPI number? ▼
Michael Duffy, DO's National Provider Identifier (NPI) is 1619380920, issued on 06/04/2014.
Does Michael Duffy, DO prescribe more brand-name or generic drugs? ▼
Michael Duffy, DO's prescribing is 18% brand-name and 82% generic drugs by claim count, with $767K in brand drug costs.
Does Michael Duffy, DO prescribe opioids? ▼
Yes, Michael Duffy, DO had 23 opioid claims in 2023 with an opioid prescribing rate of 0.4%.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does Michael Duffy, DO prescribe most often? ▼
Based on 2023 Medicare Part D data, Michael Duffy, DO's most frequently prescribed drugs include Atorvastatin Calcium, Omeprazole, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michael Duffy, DO accept Medicare? ▼
Michael Duffy, DO appears in CMS Medicare data with 5,491 Part D claims and 294 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Duffy, DO's credentials? ▼
Michael Duffy, DO's NPI is 1619380920 with credentials DO. 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.