Zachary R. Marwil, MD
Gastroenterology Internal Medicine
Zachary R. Marwil is a Gastroenterology Internal Medicine specialist based in Wantagh, NY with over 17 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Zachary R. Marwil, MD has been part of the Wantagh medical community since 2009 in group practice. He has been in practice for 17+ years. CMS Medicare data shows his patients commonly have high cholesterol, hypertension, and arthritis.
Older · 1888dNPPES updated 2021-03-22 · verify NPI on CMS · Verify license at New York State Board for Medicine
Contact & Location
Practice Location
3019 Merrick Rd, Wantagh, NY 11793-4329
How Does This Doctor Compare?
MIPS Score
202373.39/100
New York avg: 87 · US avg: 83.6
⚠ Lower than most doctors nationally(-10.2 pts)
How the government rates this doctor's Medicare care quality. Scores above 75 are considered good.
Generic Rx
↑ Higher = better76.5%
New York avg: 82 · US avg: 82.8
⚠ Lower than most doctors nationally(-6.3 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
327
Unique beneficiaries
Standard volumePrescription Recipients
343
Patients prescribed
Prescriptions Written
1,237
Total claims
Total Medicare drug cost: $1.44M
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 High Cholesterol, Hypertension, and Arthritis.
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+5%) — a focus area for this doctor
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+1%) — a focus area for this doctor
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-3%) — less common here
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↑ More patients than average (+6%) — a focus area for this doctor
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↑ More patients than average (+3%) — a focus area for this doctor
Excessive worry or fear that interferes with daily life
US avg: 34.1%↓ Fewer patients than average (-14%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$1.5k received from industry
70 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 Zachary R. Marwil's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Board certified · Mar 21, 2021
Self-reported via NPPES
17 years in practice
Experienced
Gastroenterologists diagnose and treat digestive system disorders including GERD, irritable bowel syndrome (IBS), inflammatory bowel disease (Crohn's, ulcerative colitis), liver disease, pancreatitis, and colon polyps. They perform endoscopies and colonoscopies.
Taxonomy: 207RG0100X
Virtual Internal Medicine Care With Zachary R. Marwil
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Zachary R. Marwil for cholesterol management, blood pressure monitoring, arthritis follow-ups — no travel to Wantagh 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 Zachary R. Marwil
Dr. Marwil is listed as active in the NPI registry with telehealth listed in Wantagh, NY. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (516) 785-8075.
Sourced from CMS NPPES · OIG LEIE · CMS QPP 2023 · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Contact Zachary R. Marwil
Practice Location
3019 Merrick Rd, Wantagh, NY 11793-4329
Mailing Address
3019 Merrick Rd, Wantagh, NY 11793-4329
This is a provider directory. Contact the office directly to schedule appointments.
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