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About

Catholic Health is a large nonprofit integrated healthcare system on Long Island with a focus on cardiology, oncology, orthopedic, neuroscience, women’s health, pediatrics, and senior care. It operates 9 United States offices, including a Smithtown location. For Gastroenterology in Smithtown, NY, Catholic Health Smithtown offers GI services through its network of providers and affiliated facilities. Key details: - Headquarters: Rockville Centre, NY - System size: ~18,000 employees; revenue ~$2.8B - Service scope: hospitals, physician practices, imaging, cancer institutes, ambulatory surgery, rehabilitation, home health, hospice - Smithtown address (GI-related services may be available at or via affiliated practices in the Smithtown area) If you’re seeking a specific GI provider, appointment availability, or services (e.g., colonoscopy, endoscopy, GI testing), check the Catholic Health Smithtown directory or contact their GI department for the exact provider and scheduling.

Clinic Type

Gastroenterology

Address

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

Phone

631-360-4000 (primary listed) or 631-265-0062 (Long Island Gastroenterology & Liver Diseases, PC - Smithtown)

Email

privacy@chsli.org

Opening Hours

Not published — contact the clinic to confirm hours.

Services Offered

  • Gastroenterology
  • Gastroenterology clinics
  • GI physicians
  • GI care
  • Digestive health
  • Colorectal health

Team

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

Insurance & Payment

Languages Spoken

FAQs

What gastroenterology services are offered?

Gastroenterology care by Catholic Health Physician Partners in Smithtown.

Is the provider accepting new patients?

Yes, many listings show 'Accepting New Patients'.

Photos

What Patients Say

Overall sentiment across review platforms: positive

  • Catholic Health ProviderMatch: 4.9/5 (115 ratings, 13 reviews)
  • Catholic Health ProviderMatch: 4.9/5 (93 ratings, 14 reviews)
  • Catholic Health ProviderMatch: 5.0/5 (262 ratings, 67 reviews)

Patients praise

  • kind and caring demeanor
  • thorough and informative explanations
  • listens to patient concerns
  • professional and empathetic staff
  • easy scheduling process

Common complaints

  • condescending bedside manner
  • lack of thorough diagnostic testing
  • unexplained charges/harassment regarding billing
  • rude office staff interactions

"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 Patient Reviews

"Dr. Ainapudi is excellent, looked for the cause root of my liver issue, explained everything in details, allowed me to ask all my questions."

Catholic Health Patient Reviews

"He was condescending and nasty. Absolutely horrific bedside manner. Told me nothing was wrong and that I could go home."

Healthgrades - Dr. Alan Spielberg (Gastroenterologist in Smithtown)

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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