NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1265967665 DO
Verify on CMS → Dexter Clark, DO
Family Medicine Physician in Marquette, 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 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
945
Medicare Part D claims · 80 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
79%
generic claims · 19% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Dexter Clark, DO filed 945 Medicare Part D claims in 2023 as a Family Medicine Physician in Marquette, Michigan, prescribing 79% generic.
- 945
- Part D claims, 2023
- 79%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥75th
- 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 1265967665 · Family Medicine Physician
NPI-10 · ENUM-RECENT · TAX-MEGA · RX-LIGHT · BOOK-MID · PHOTO-ENUM
- NPI-10 1265967665
- ENUM-RECENT 2017
- TAX-MEGA 148K Family Medicine
- RX-LIGHT 945
- BOOK-MID 5,662 in Michigan
- PHOTO-ENUM Kiran Sahi · 2017
Dexter Clark, DO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
945 ≥ 75th percentile 75% 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 certification likely (heuristic, not verified)
Dexter Clark, DO 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 Dexter Clark, DO?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
945 72% vs specialty avg
Specialty distribution in Michigan
How Family 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 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 | 1265967665 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 04/24/2017 |
Hospital and facility affiliations
Facilities where Dexter Clark, DO 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.
Dlp Marquette Physician Practices Inc
Marquette, MI
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Dexter Clark, DO. To verify Dexter Clark, DO'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
Dexter Clark, DO - brand share 19.0%
Family Medicine Physician average
19% brand-name claims vs 79% generic, on 945 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.
945
Total Claims
$134K
Total Drug Cost
80
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,105
- Total Day Supply
- 61,292
- Brand vs Generic
- 19% brand / 79% generic
- Brand Drug Cost
- $115K
- Generic Drug Cost
- $19K
- Opioid Claims
- 42 (4.4% rate)
Patient Demographics
- Average Patient Age
- 70.2 years
- Avg HCC Risk Score
- 1.41
- Gender Split
- 44% female / 56% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Dexter Clark, DO prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
50 claims
- Lisinopril
Lisinopril
50 claims
- Atorvastatin Calcium
Atorvastatin Calcium
45 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
37 claims
- Omeprazole
Omeprazole
29 claims
- Amlodipine Besylate
Amlodipine Besylate
27 claims
- Clonazepam
Clonazepam
26 claims
- Metoprolol Tartrate
Metoprolol Tartrate
26 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 50 |
| Lisinopril | 50 |
| Atorvastatin Calcium | 45 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 37 |
| Omeprazole | 29 |
| Amlodipine Besylate | 27 |
| Clonazepam | 26 |
| Metoprolol Tartrate | 26 |
| Losartan Potassium | 23 |
| Pregabalin | 23 |
* 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 Dexter Clark, 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
Dexter Clark, DO's 945 claims are below the specialty average of 3,418.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Clark, both outside Michigan so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2017)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in Michigan
Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as Clark.
One of 5,662 Family Medicine Physician providers enrolled in Michigan, 5 are shown here.
Asma Abbas
Hamtramck, MI
Dr. Saadia Abbas
MD
Chesterfield, MI
Faezeh Abbasi
Monroe, MI
Dr. Marisa Abbo
DO
Rochester Hills, MI
Dr. Cathleen Abbott
M.D.
East Lansing, MI
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Dexter Clark, DO's specialty? ▼
Dexter Clark, DO specializes in Family Medicine Physician and practices in Marquette, Michigan. Credentials: DO.
How much does Dexter Clark, DO prescribe under Medicare Part D? ▼
In 2023, Dexter Clark, DO wrote 945 Medicare Part D claims totaling $134K in drug costs for 80 beneficiaries.
Where is Dexter Clark, DO located? ▼
Dexter Clark, DO is located at 1414 W FAIR AVE, Marquette, MI, 49855. Phone: (906) 225-3867.
What is Dexter Clark, DO's NPI number? ▼
Dexter Clark, DO's National Provider Identifier (NPI) is 1265967665, issued on 04/24/2017.
Does Dexter Clark, DO prescribe more brand-name or generic drugs? ▼
Dexter Clark, DO's prescribing is 19% brand-name and 79% generic drugs by claim count, with $115K in brand drug costs.
Does Dexter Clark, DO prescribe opioids? ▼
Yes, Dexter Clark, DO had 42 opioid claims in 2023 with an opioid prescribing rate of 4.4%.
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 Dexter Clark, DO prescribe most often? ▼
Based on 2023 Medicare Part D data, Dexter Clark, DO's most frequently prescribed drugs include Levothyroxine Sodium, Lisinopril, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Dexter Clark, DO accept Medicare? ▼
Dexter Clark, DO appears in CMS Medicare data with 945 Part D claims and 80 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Dexter Clark, DO's credentials? ▼
Dexter Clark, DO's NPI is 1265967665 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.