Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Gastroenterology

Steven L. Kadish, MD

Works at hospitals in Oceanside, NY · New York

Summary

Dr. Steven L. Kadish, MD is a gastroenterologist at 141 Washington Ave, Suite 204, Lawrence, NY 11559. Phone: (516) 341-0990. Accepts Medicare assignment. In 2024, Steven L. Kadish had 673 Original Medicare patients and 1,337 services. NPI 1154303683. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Gastroenterologist (Medicare lists Gastroenterology)
  • Address: 141 Washington Ave, Suite 204, Lawrence, NY 11559 · Directions
  • Phone: (516) 341‑0990
  • Medicare: Accepts Medicare assignment
  • Hospital: Mount Sinai South Nassau
  • Group practice: South Island Gastroenterology Associates PC
  • Medical school: Albert Einstein College Of Medicine Of Yeshiva University · graduated 1988 (38 years since medical school)
  • Gender (as listed): Male
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about Steven L. Kadish, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Steven L. Kadish accept Medicare assignment?
Yes. Medicare's clinician data says Steven L. Kadish accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Steven L. Kadish see?
In 2024, CMS data shows 673 Original Medicare patients and 1,337 services for Steven L. Kadish. This counts Original Medicare only and measures volume, not quality.
What is Steven L. Kadish's NPI number?
1154303683. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Steven L. Kadish, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients673
Services billed to Medicare1,337
Different services or procedures31
Participating Medicare providerYes
Average age of these patients74

Most frequent services

  1. Biopsy of large bowel using a flexible endoscope (45380)320 services
  2. Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)221 services
  3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)207 services
  4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)150 services
  5. Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)120 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High cholesterol75%
  • High blood pressure73%
  • Arthritis49%
  • Diabetes37%
  • Ischemic heart disease34%
  • Anxiety22%

Hospitals where Steven L. Kadish works

Medicare's Facility Affiliation Data lists Steven L. Kadish at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

  • Mount Sinai South NassauOceanside, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330198

Practice locations

Addresses where Steven L. Kadish is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Steven L. Kadish as a member of this group (CMS data updated October 2, 2026).

  • South Island Gastroenterology Associates PC7 clinicians in the group

Specialties

Find other Gastroenterology doctors in New York →

Other gastroenterologists in New York

Clinicians with the same Medicare primary specialty in New York — not a recommendation.

All gastroenterologists in New York →

Other clinicians in South Island Gastroenterology Associates PC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolAlbert Einstein College Of Medicine Of Yeshiva University
Graduation year1988 (38 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1154303683
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians