NPI registry status
Active
2026 NPPES data Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician NPI 1225001746 MD
Verify on CMS → Mark Brennan, MD
Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician in Clinton Township, 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 149 in Neuromuscular Medicine (Physical Medicine & Rehabilitation) 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
1K
Medicare Part D claims · 84 beneficiaries · Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician avg: 682
Generic prescribing
99%
generic claims · 1% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
70.4/100
▼ 13 pts below national avg 83.1 · Mid-tier
Industry payments
$73.98
4 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
Mark Brennan, MD reported a CMS MIPS final score of 70.4/100 - below the 83.1 national average - and filed 1,033 Medicare Part D claims in 2023.
- 70.4/100
- MIPS score · -13 vs avg
- 1K
- Part D claims, 2023
- 99%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
Mark Brennan, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
70 8th percentile higher than 8% 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 Mark Brennan, MD sits
This provider among neuromuscular medicine (physical medicine & rehabilitation) physician peers
Across the 20 neuromuscular medicine (physical medicine & rehabilitation) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Mark Brennan, MD writes more Part D claims than 70% of them and scores higher on MIPS quality than 15% - 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 neuromuscular medicine (physical medicine & rehabilitation) physician peer from a representative sample of 19; the gold marker is Mark Brennan, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Mark Brennan, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Mark Brennan, MD?
Below national averagePrimary specialty
Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician
Medicare Part D claims
1,033 51% vs specialty avg
MIPS final score
70.4/100 12.7 pts vs avg
Specialty distribution in Michigan
How Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician compares to other specialties among Michigan providers
Medicare quality performance, MIPS
Mark Brennan, MD's 2023 MIPS final score plotted against the Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician national average
- MIPS Final Score
- 70.4/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician) - 70.4/100 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).
Mark Brennan, MD appears in the CMS NPPES registry as a Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician provider holding MD credentials at 43650 GARFIELD RD, Clinton Township, MI, 48038, with a listed phone of (586) 263-0820. NPI 1225001746 was issued on 02/08/2006.
Medicare Part D records for calendar year 2023 show 1,033 prescription claims written by this provider, covering 84 Medicare beneficiaries and totaling roughly $19K in drug spend, split 1% brand-name and 99% generic by claim count, with an opioid prescribing rate of 39.7%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 70.4/100 for the 2023 performance year (Quality 40.3, Cost 74.2), compared with the national average of 83.1.
Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician is a narrow specialty nationwide, with 149 enrolled providers across 35 states and an average of 682 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 | 1225001746 |
|---|---|
| Specialty | Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 02/08/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
70.4142
Final Score
Avg: 83.1
40.2605
Quality
74.2065
Cost
Reporting: Group practice
Hospital and facility affiliations
Facilities where Mark Brennan, 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.
Associates IN Family Practice PLLC
Sterling Heights, 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).
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 Mark Brennan, MD. Source: openpaymentsdata.cms.gov.
Total received
$74
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 Mark Brennan, MD. To verify Mark Brennan, 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 · Generic-heavy
Mark Brennan, MD - brand share 1.0%
Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician average
1% brand-name claims vs 99% generic, on 1,033 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.
1,033
Total Claims
$19K
Total Drug Cost
84
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,092
- Total Day Supply
- 28,965
- Brand vs Generic
- 1% brand / 99% generic
- Brand Drug Cost
- $228
- Generic Drug Cost
- $19K
- Opioid Claims
- 410 (39.7% rate)
Patient Demographics
- Average Patient Age
- 68.3 years
- Avg HCC Risk Score
- 1.10
- Gender Split
- 64% female / 36% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mark Brennan, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
300 claims
- Methylprednisolone
Methylprednisolone
131 claims
- Tramadol Hcl 100
Tramadol Hcl
100 claims
- Naproxen 96
Naproxen
96 claims
- Cyclobenzaprine Hcl 84
Cyclobenzaprine Hcl
84 claims
- Diclofenac Sodium 81
Diclofenac Sodium
81 claims
- Ibuprofen 55
Ibuprofen
55 claims
- Gabapentin 45
Gabapentin
45 claims
| Drug | Claims |
|---|---|
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 300 |
| Methylprednisolone | 131 |
| Tramadol Hcl | 100 |
| Naproxen | 96 |
| Cyclobenzaprine Hcl | 84 |
| Diclofenac Sodium | 81 |
| Ibuprofen | 55 |
| Gabapentin | 45 |
| Oxaprozin | 24 |
| Tizanidine Hcl | 23 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician in MI →
All providers in Michigan →
Compare specialties →
Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician Overview
How Mark Brennan, MD fits within the Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician landscape nationally.
149
Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician Providers in US
35
States with Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician
682
Avg Claims per Provider
Mark Brennan, MD's 1,033 claims are above the specialty average of 682.
Nearby Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician Providers in Michigan
Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as Brennan.
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 Michigan medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician 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.
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Frequently Asked Questions
What is Mark Brennan, MD's specialty? ▼
Mark Brennan, MD specializes in Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician and practices in Clinton Township, Michigan. Credentials: MD.
How much does Mark Brennan, MD prescribe under Medicare Part D? ▼
In 2023, Mark Brennan, MD wrote 1,033 Medicare Part D claims totaling $19K in drug costs for 84 beneficiaries.
What is Mark Brennan, MD's Medicare quality score? ▼
Mark Brennan, MD has a CMS MIPS Final Score of 70.4/100 (Quality: 40.3, Cost: 74.2). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Mark Brennan, MD located? ▼
Mark Brennan, MD is located at 43650 GARFIELD RD, Clinton Township, MI, 48038. Phone: (586) 263-0820.
What is Mark Brennan, MD's NPI number? ▼
Mark Brennan, MD's National Provider Identifier (NPI) is 1225001746, issued on 02/08/2006.
Does Mark Brennan, MD prescribe more brand-name or generic drugs? ▼
Mark Brennan, MD's prescribing is 1% brand-name and 99% generic drugs by claim count, with $228 in brand drug costs.
Does Mark Brennan, MD prescribe opioids? ▼
Yes, Mark Brennan, MD had 410 opioid claims in 2023 with an opioid prescribing rate of 39.7%.
How many Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician providers are there in the US? ▼
There are 149 Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician providers across 35 states in the US. The average Neuromuscular Medicine (Physical Medicine & Rehabilitation) Physician provider writes 682 Medicare Part D claims per year.
What drugs does Mark Brennan, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Mark Brennan, MD's most frequently prescribed drugs include Hydrocodone-Acetaminophen, Methylprednisolone, Tramadol Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Brennan, MD accept Medicare? ▼
Mark Brennan, MD appears in CMS Medicare data with 1,033 Part D claims and 84 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Brennan, MD's credentials? ▼
Mark Brennan, MD's NPI is 1225001746 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.