Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Mitchell I Weinstein, DO

Individual provider Gastroenterology Physician · NPI 1942292206

Dr. Mitchell I Weinstein, DO practises Internal Medicine in West Islip, New York. Qualified in 1984, 42 years ago. Practices with Island Gastroenterology Consultants PC, a 13-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
42
Licensed in
NY
In the registry since
2005
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

631 Montauk Hwy Ste 2
West Islip, NY 11795-4400
Phone: (631) 321-3840
Fax: (631) 321-3842
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 162637 (NY)

Record details

NPI number1942292206
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedAugust 22, 2005
Last updated in NPPESJanuary 10, 2022
Certification dateJanuary 10, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Also practisesGASTROENTEROLOGY
Medical schoolOTHER
Graduated 1984 (42 years in practice)
Group practice Island Gastroenterology Consultants Pc — 13 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Colonoscopy 113 times · 82nd percentile
Upper gastrointestinal (GI) endoscopy for acid reflux 89 times · 74th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients517
Services billed 1,291 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Island Gastroenterology Consultants PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

Other providers in West Islip