Marshall Barnett Sack, D.O.
Marshall Barnett Sack is a Family Medicine specialist based in Novi, MI with over 48 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Marshall Barnett Sack, D.O. has practiced family medicine for 48+ years, working in group practice. A Michigan State University College of Human Medicine graduate since 1978, he brings 48+ years of experience. CMS Medicare data shows his patients commonly have high cholesterol, hypertension, and anxiety.
At a glance
- Uses generic medications more than 67% of reporting doctors in Michigan
- Virtual visits available — no app or travel required
Older · 5871dNPPES updated 2010-04-26 · verify NPI on CMS · Verify license at Michigan Board of Medicine
Contact & Location
Practice Location
39500 W 10 Mile Rd Ste. 100, Novi, MI 48375-2947
How Does This Doctor Compare?
Based on Medicare data, this doctor favors affordable generic drugs over brand-name ones.
Generic Rx
↑ Higher = better89.4%
Michigan avg: 83.5 · US avg: 82.8
✓ Higher than most doctors nationally(+6.6 pts)
Typical range among reporting doctors in MichiganHow often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
300
Unique beneficiaries
Standard volumePrescription Recipients
646
Patients prescribed
Prescriptions Written
8,876
Total claims
Total Medicare drug cost: $1.28M
Percentile rankings compared against 1,194 reporting peers in Michigan.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages High Cholesterol, Hypertension, and Anxiety Disorders.
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+1%) — a focus area for this doctor
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↓ Fewer patients than average (-2%) — less common here
Excessive worry or fear that interferes with daily life
US avg: 34.1%↑ More patients than average (+22%) — a focus area for this doctor
Conditions affecting emotional state, including depression and bipolar disorder
A condition with extreme mood swings between emotional highs and lows
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-12%) — less common here
A mood disorder causing persistent sadness and loss of interest in activities
US avg: 31.8%↑ More patients than average (+5%) — a focus area for this doctor
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↓ Fewer patients than average (-6%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$880 received from industry
39 transactions reported in 2024 ·Moderate tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Marshall Barnett Sack's NPI.
Social Vulnerability Index: 0.73 / 1.00
Moderate vulnerabilityHe practices in a community where the CDC measures social vulnerability across socioeconomic status, household composition, racial/ethnic minority status, and housing/transportation factors. A higher index indicates more residents may face barriers accessing care.
Source: CDC/ATSDR Social Vulnerability Index.
Patient Reviews
No patient reviews yet. If you've seen Marshall Barnett Sack, your feedback helps other patients.
Review PolicyAll feedback is moderated before publishing. We verify reviewer identity where possible and enforce a one-review-per-provider policy. Full guidelines →
Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1978
Michigan State University College of Human Medicine
48 years in practice
Senior practitioner
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
Taxonomy: 207Q00000X
Education & Training
Michigan State University College of Human Medicine (Class of 1978)
Virtual Family Medicine Care With Marshall Barnett Sack
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Marshall Barnett Sack for cholesterol management, blood pressure monitoring, anxiety counseling — no travel to Novi required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Marshall Barnett Sack
NPI records show Dr. Sack as active with telehealth listed in Novi, MI. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (248) 476-0035.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator · HRSA HPSA · CDC SVI. See Data Methodology.
Is this your profile?
Verify credentials, update practice details, and manage telehealth.
Medical Disclaimer: NPI Telehealth is a provider directory for informational purposes only. This page does not constitute medical advice, diagnosis, or treatment recommendations. Provider data is sourced from the CMS NPPES federal registry and public Medicare datasets. NPI Telehealth does not verify clinical qualifications beyond federal records. Data may not reflect real-time availability — always contact the provider's office directly to confirm details before seeking care.
Contact Marshall Barnett Sack
Practice Location
39500 W 10 Mile Rd Ste. 100, Novi, MI 48375-2947
Mailing Address
39500 W 10 Mile Rd Ste. 100, Novi, MI 48375-2947
This is a provider directory. Contact the office directly to schedule appointments.
Related Providers