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About

Summary: Catholic Health is a large nonprofit integrated health system on Long Island with about 18,000 employees and annual revenue around $2.8B. It operates multiple facilities including six hospitals, physician practices, imaging centers, cancer institutes, ambulatory surgery centers, rehab, home health, and hospice services, headquartered in Rockville Centre, NY. The system serves the region with locations in Smithtown and surrounding areas, offering gastroenterology among other specialties. If your focus is Gastroenterology in Smithtown, NY, Catholic Health is a major provider network in the area and may include gastroenterology services through its affiliated hospitals and physician practices. For a specific gastroenterology provider in Smithtown (provider matches), you may want to search within Catholic Health’s Smithtown location or contact their GI department for provider availability and appointment options.

Clinic Type

Gastroenterology

Address

48 Route 25A, Suite 105, Smithtown, NY 11787

Phone

631-360-4000

Email

privacy@chsli.org

Opening Hours

Not published — contact the clinic to confirm hours.

Services Offered

Team

  • Ujjwal Kumar, MD — Gastroenterology
  • Ravi Shankar Ainapudi, MD — Gastroenterology
  • Kanika Kaur, MD — Gastroenterology
  • Zvi A Alpern, MD — Gastroenterology
  • Henry Ferstenberg, MD — Gastroenterology
  • Joel Chandy, DO — Gastroenterology
  • Rahul Bajaj, MD — Gastroenterology
  • Kevin Sano, MD — Gastroenterology
  • Ajish Pillai, MD — Gastroenterology
  • Rachana Oak, DO — Gastroenterology
  • Ravi Singh, MD — Gastroenterology
  • Syeda T Hossain, MD — Gastroenterology

Insurance & Payment

Languages Spoken

Photos

What Patients Say

Overall sentiment across review platforms: very positive

  • Catholic Health ProviderMatch (Dr. Ujjwal Kumar): 4.9/5 stars (95 ratings, 13 reviews)
  • Catholic Health ProviderMatch (Dr. Kanika Kaur): 4.9/5 stars (115 ratings, 13 reviews (for Dr. Kanika Kaur))

Patients praise

  • Thorough and comprehensive care
  • Excellent bedside manner and kindness
  • Clear and empathetic communication
  • Professional and knowledgeable staff
  • Efficient scheduling and patient-centered approach

Common complaints

  • Some patients reported minor scheduling or administrative frustrations, although reviews are overwhelmingly positive

"Dr. Kumar is not only professional, knowledgeable, but has a kind and empathetic manner that lets you know u are in competent hands Highly recommend him for your medical concerns"

Catholic Health ProviderMatch Patient Review

"Dr. Kaur was so kind and put me at ease immediately. She listened to my embarrassment and assured me I was not alone."

Catholic Health ProviderMatch Patient Review

Synthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].

Information sourced from the clinic's website as of July 11, 2026.

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