Mitchell Fenster, M.D.
Mitchell Fenster, M.D. has practiced internal medicine for 45+ years, working in group practice. He graduated from Icahn School of Medicine at Mount Sinai in 1981 and has 45+ years of clinical experience. He regularly sees Medicare patients with hypertension, high cholesterol, and arthritis (per CMS claims data). CMS MIPS quality score: 91.58/100 (2023).
At a glance
- Prescribes opioids less than 36% of reporting doctors in New York
- Uses generic medications more than 78% of reporting doctors in New York
- Federal MIPS score higher than 60% of MIPS-scored doctors in New York
- Virtual visits available — no app or travel required
Older · 4984dNPPES updated 2012-09-12 · verify on CMS
Contact & Location
Practice Location
401 Columbus Ave, Valhalla, NY 10595-1325
How Does This Doctor Compare?
Based on Medicare data, this doctor has an average quality score compared to other doctors in New York, prescribes opioid pain medications conservatively, favors affordable generic drugs over brand-name ones.
MIPS Score
202391.58/100
New York avg: 87 · US avg: 83.6
✓ Higher than most doctors nationally(+8 pts)
Average range among MIPS-scored doctors in New YorkHow the government rates this doctor's Medicare care quality. Scores above 75 are considered good.
Opioid Rx
↓ Lower = better0.75%
New York avg: 3.5 · US avg: 5.1
✓ Higher than most doctors nationally(-4.3 pts)
0.75% of this doctor's prescriptions are opioid pain medications. Lower means more cautious prescribing.
Generic Rx
↑ Higher = better92.3%
New York avg: 82 · US avg: 82.8
✓ Higher than most doctors nationally(+9.5 pts)
Better than 78% of reporting doctors in New YorkHow often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
446
Unique beneficiaries
Standard volumePrescription Recipients
534
Patients prescribed
Prescriptions Written
5,707
Total claims
Total Medicare drug cost: $406k
Percentile rankings compared against 8,064 reporting peers in New York.
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 Hypertension, High Cholesterol, and Arthritis.
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+5%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+5%) — a focus area for this doctor
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↑ More patients than average (+2%) — 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 (-1%) — less common here
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%Excessive worry or fear that interferes with daily life
US avg: 34.1%↓ Fewer patients than average (-7%) — less common here
Diseases involving abnormal cell growth with potential to spread to other body parts
US avg: 20.8%↑ More patients than average (+1%) — a focus area for this doctor
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↓ Fewer patients than average (-10%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$258 received from industry
2 transactions reported in 2018 ·Low 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 2018, attributed to Mitchell Fenster's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1981
Icahn School of Medicine at Mount Sinai
45 years in practice
Senior practitioner
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Taxonomy: 207R00000X
Education & Training
Icahn School of Medicine at Mount Sinai (Class of 1981)
Mailing address
190 Goldens Bridge Road, Katonah, NY 10536
Differs from practice location
Virtual Internal Medicine Care With Mitchell Fenster
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Mitchell Fenster for blood pressure monitoring, cholesterol management, arthritis follow-ups — no travel to Valhalla 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 Mitchell Fenster
Dr. Fenster is listed as active in the NPI registry with telehealth listed in Valhalla, NY. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (914) 769-0268.
Sourced from CMS NPPES · OIG LEIE · CMS QPP 2023 · CMS Medicare Part D · CMS Open Payments 2018 · CMS Physician Comparator. See Data Methodology.
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Contact Mitchell Fenster
Practice Location
401 Columbus Ave, Valhalla, NY 10595-1325
Mailing Address
190 Goldens Bridge Road, Katonah, NY 10536
This is a provider directory. Contact the office directly to schedule appointments.
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