NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1801888904 MD
Verify on CMS → Mazin Yonan, MD
Internal Medicine Physician in Troy, Michigan.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 in Internal 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
11K
Medicare Part D claims · 390 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
82%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.3K
50 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Mazin Yonan, MD filed 11,407 Medicare Part D claims in 2023 as an Internal Medicine Physician in Troy, Michigan, prescribing 82% generic.
- 11K
- Part D claims, 2023
- 82%
- generic prescribing
- $1.3K
- industry payments (Sunshine Act)
- ≥98th
- 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 1801888904 · Internal Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-HEAVY · BOOK-MID · PHOTO-ENUM
- NPI-10 1801888904
- ENUM-LEGACY 2005
- TAX-MEGA 173K Internal Medicine
- RX-HEAVY 11K claims
- BOOK-MID 6,520 in Michigan
- PHOTO-ENUM Kurt Kampert · 2005
Mazin Yonan, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
11,407 ≥ 98th percentile 98% 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)
Mazin Yonan, MD 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 Mazin Yonan, MD?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
11,407 320% vs specialty avg
Specialty distribution in Michigan
How Internal Medicine Physician compares to other specialties among Michigan 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 Internal 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 | 1801888904 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 08/16/2005 |
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 Mazin Yonan, MD. Source: openpaymentsdata.cms.gov.
Total received
$1.3K
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 - Michigan MI-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 ~41K Michigan medical licensees in 2023 - they are NOT specific to Mazin Yonan, MD. To verify Mazin Yonan, MD's current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases
MI-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 Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Mazin Yonan, MD - brand share 15.0%
Internal Medicine Physician average
15% brand-name claims vs 82% generic, on 11,407 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.
11,407
Total Claims
$1.6M
Total Drug Cost
390
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 21,123
- Total Day Supply
- 615,997
- Brand vs Generic
- 15% brand / 82% generic
- Brand Drug Cost
- $1.3M
- Generic Drug Cost
- $242K
- Opioid Claims
- 211 (1.8% rate)
- Antibiotic Claims
- 184
Patient Demographics
- Average Patient Age
- 72.3 years
- Avg HCC Risk Score
- 2.00
- Gender Split
- 60% female / 40% male
- Age Distribution
- <65: 61, 65-74: 161, 75-84: 121, 85+: 47
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mazin Yonan, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Amlodipine Besylate
Amlodipine Besylate
490 claims
- Atorvastatin Calcium
Atorvastatin Calcium
480 claims
- Losartan Potassium
Losartan Potassium
443 claims
- Omeprazole
Omeprazole
354 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
347 claims
- Metoprolol Succinate
Metoprolol Succinate
331 claims
- Metformin Hcl
Metformin Hcl
290 claims
- Levothyroxine Sodium
Levothyroxine Sodium
258 claims
| Drug | Claims |
|---|---|
| Amlodipine Besylate | 490 |
| Atorvastatin Calcium | 480 |
| Losartan Potassium | 443 |
| Omeprazole | 354 |
| Rosuvastatin Calcium | 347 |
| Metoprolol Succinate | 331 |
| Metformin Hcl | 290 |
| Levothyroxine Sodium | 258 |
| Gabapentin | 226 |
| Hydralazine Hcl | 208 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Mazin Yonan, MD fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Mazin Yonan, MD's 11,407 claims are above the specialty average of 2,716.
Nationwide Internal Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Yonan, both outside Michigan 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 Internal Medicine Physician Providers in Michigan
Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as Yonan.
One of 6,520 Internal Medicine Physician providers enrolled in Michigan, 5 are shown here.
Dr. Keith Aaronson
MD
Ann Arbor, MI
Dr. Tomas Abalo
M.D.
Iron Mountain, MI
Dr. Ali Abbas
M.D.
Pontiac, MI
Dr. Hawazin Abbas
MD
Auburn Hills, MI
Dr. Imran Abbasi
D.O.
Warren, MI
Compare Internal Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Mazin Yonan, MD's specialty? ▼
Mazin Yonan, MD specializes in Internal Medicine Physician and practices in Troy, Michigan. Credentials: MD.
How much does Mazin Yonan, MD prescribe under Medicare Part D? ▼
In 2023, Mazin Yonan, MD wrote 11,407 Medicare Part D claims totaling $1.6M in drug costs for 390 beneficiaries.
Where is Mazin Yonan, MD located? ▼
Mazin Yonan, MD is located at 2221 LIVERNOIS RD, Troy, MI, 48083. Phone: (248) 250-9474.
What is Mazin Yonan, MD's NPI number? ▼
Mazin Yonan, MD's National Provider Identifier (NPI) is 1801888904, issued on 08/16/2005.
Does Mazin Yonan, MD prescribe more brand-name or generic drugs? ▼
Mazin Yonan, MD's prescribing is 15% brand-name and 82% generic drugs by claim count, with $1.3M in brand drug costs.
Does Mazin Yonan, MD prescribe opioids? ▼
Yes, Mazin Yonan, MD had 211 opioid claims in 2023 with an opioid prescribing rate of 1.8%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Mazin Yonan, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Mazin Yonan, MD's most frequently prescribed drugs include Amlodipine Besylate, Atorvastatin Calcium, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mazin Yonan, MD accept Medicare? ▼
Mazin Yonan, MD appears in CMS Medicare data with 11,407 Part D claims and 390 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mazin Yonan, MD's credentials? ▼
Mazin Yonan, MD's NPI is 1801888904 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.
- 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.