NPI registry status
Active
2026 NPPES data Specialist NPI 1679512081 MD
Verify on CMS → Mazen Mahjoub, MD
Specialist in Warren, Ohio.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 69,608 in Specialist, 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
11K
Medicare Part D claims · 2K beneficiaries · Specialist avg: 1K
Generic prescribing
79%
generic claims · 21% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
15.2/100
▼ 68 pts below national avg 83.1 · Penalty band
Industry payments
$1.4K
85 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
Mazen Mahjoub, MD reported a CMS MIPS final score of 15.2/100 - below the 83.1 national average - and filed 11,454 Medicare Part D claims in 2023.
- 15.2/100
- MIPS score · -68 vs avg
- 11K
- Part D claims, 2023
- 79%
- generic prescribing
- $1.4K
- 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.
Mazen Mahjoub, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
15 2nd percentile higher than 2% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where Mazen Mahjoub, MD sits
This provider among specialist peers
Across the 4,869 specialist providers who report both Medicare Part D prescribing and a MIPS quality score, Mazen Mahjoub, MD writes more Part D claims than 98% of them and scores higher on MIPS quality than 8% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one specialist peer from a representative sample of 60; the gold marker is Mazen Mahjoub, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Mazen Mahjoub, MD?
Below national averagePrimary specialty
Specialist
Medicare Part D claims
11,454 8× vs specialty avg
MIPS final score
15.2/100 67.9 pts vs avg
Specialty distribution in Ohio
How Specialist compares to other specialties among Ohio providers
Medicare quality performance, MIPS
Mazen Mahjoub, MD's 2023 MIPS final score plotted against the Specialist national average
- MIPS Final Score
- 15.2/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Specialist) - 15.2/100 vs national avg 83.1
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).
Mazen Mahjoub, MD appears in the CMS NPPES registry as a Specialist provider holding MD credentials at 9375 E MARKET ST, Warren, OH, 44484, with a listed phone of (330) 392-0100. NPI 1679512081 was issued on 06/05/2006.
Medicare Part D records for calendar year 2023 show 11,454 prescription claims written by this provider, covering 1,504 Medicare beneficiaries and totaling roughly $2.2 million in drug spend, split 21% brand-name and 79% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 15.2/100 for the 2023 performance year (Quality 0, Cost 50.5), compared with the national average of 83.1.
Specialist is a high-volume specialty nationwide, with 69,608 enrolled providers across 55 states and an average of 1,474 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 | 1679512081 |
|---|---|
| Specialty | Specialist |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/05/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
15.1609
Final Score
Avg: 83.1
0
Quality
50.5365
Cost
Reporting: Individual
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 Mazen Mahjoub, MD. Source: openpaymentsdata.cms.gov.
Total received
$1.4K
Largest payer
Novartis Pharmaceuticals 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 - Ohio OMB 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 ~48K Ohio medical licensees in 2023 - they are NOT specific to Mazen Mahjoub, MD. To verify Mazen Mahjoub, MD's current license status, search the OMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
158
Total board actions, Ohio 2023
Across 154 cases
3.29
Actions per 1,000 licensees
Ohio statewide rate
probation
Most common action type
56 cases
OMB 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 Ohio disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Mazen Mahjoub, MD - brand share 21.0%
Specialist average
21% brand-name claims vs 79% generic, on 11,454 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.
11,454
Total Claims
$2.2M
Total Drug Cost
1,504
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 24,462
- Total Day Supply
- 730,407
- Brand vs Generic
- 21% brand / 79% generic
- Brand Drug Cost
- $2.0M
- Generic Drug Cost
- $187K
- Antibiotic Claims
- 21
Patient Demographics
- Average Patient Age
- 76.8 years
- Avg HCC Risk Score
- 1.55
- Gender Split
- 47% female / 53% male
- Age Distribution
- <65: 81, 65-74: 514, 75-84: 630, 85+: 279
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mazen Mahjoub, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Metoprolol Succinate
Metoprolol Succinate
1,431 claims
- Eliquis
Eliquis
918 claims
- Furosemide
Furosemide
695 claims
- Atenolol
Atenolol
681 claims
- Lisinopril
Lisinopril
673 claims
- Isosorbide Mononit…
Isosorbide Mononitrate Er
596 claims
- Clopidogrel
Clopidogrel
591 claims
- Atorvastatin Calcium
Atorvastatin Calcium
581 claims
| Drug | Claims |
|---|---|
| Metoprolol Succinate | 1,431 |
| Eliquis Apixaban | 918 |
| Furosemide | 695 |
| Atenolol | 681 |
| Lisinopril | 673 |
| Isosorbide Mononitrate Er Isosorbide Mononitrate | 596 |
| Clopidogrel Clopidogrel Bisulfate | 591 |
| Atorvastatin Calcium | 581 |
| Metoprolol Tartrate | 422 |
| Entresto Sacubitril/Valsartan | 417 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Specialist Overview
How Mazen Mahjoub, MD fits within the Specialist landscape nationally.
69,608
Specialist Providers in US
55
States with Specialist
1,474
Avg Claims per Provider
Mazen Mahjoub, MD's 11,454 claims are above the specialty average of 1,474.
Nearby Specialist Providers in Ohio
Other clinicians with the same primary specialty enrolled in Ohio, drawn from the same CMS NPPES roster as Mahjoub.
Dr. Mourad Abdelmessih
M.D
Newark, OH
Dr. Jon Abrahamson
M.D.
Fairview Park, OH
Dr. Samir Abraksia
M.D.
Beachwood, OH
Dr. Drew Abramovich
M.D.
Wooster, OH
Dr. Marc Abrams
M.D., PH.D.
Cleveland, OH
Compare Specialist 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 Ohio medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Specialist 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
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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 Mazen Mahjoub, MD's specialty? ▼
Mazen Mahjoub, MD specializes in Specialist and practices in Warren, Ohio. Credentials: MD.
How much does Mazen Mahjoub, MD prescribe under Medicare Part D? ▼
In 2023, Mazen Mahjoub, MD wrote 11,454 Medicare Part D claims totaling $2.2M in drug costs for 1,504 beneficiaries.
What is Mazen Mahjoub, MD's Medicare quality score? ▼
Mazen Mahjoub, MD has a CMS MIPS Final Score of 15.2/100 (Quality: 0, Cost: 50.5). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Mazen Mahjoub, MD located? ▼
Mazen Mahjoub, MD is located at 9375 E MARKET ST, Warren, OH, 44484. Phone: (330) 392-0100.
What is Mazen Mahjoub, MD's NPI number? ▼
Mazen Mahjoub, MD's National Provider Identifier (NPI) is 1679512081, issued on 06/05/2006.
Does Mazen Mahjoub, MD prescribe more brand-name or generic drugs? ▼
Mazen Mahjoub, MD's prescribing is 21% brand-name and 79% generic drugs by claim count, with $2.0M in brand drug costs.
How many Specialist providers are there in the US? ▼
There are 69,608 Specialist providers across 55 states in the US. The average Specialist provider writes 1,474 Medicare Part D claims per year.
What drugs does Mazen Mahjoub, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Mazen Mahjoub, MD's most frequently prescribed drugs include Metoprolol Succinate, Eliquis, Furosemide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mazen Mahjoub, MD accept Medicare? ▼
Mazen Mahjoub, MD appears in CMS Medicare data with 11,454 Part D claims and 1,504 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mazen Mahjoub, MD's credentials? ▼
Mazen Mahjoub, MD's NPI is 1679512081 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 (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.
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.