Gastroenterologists Near Me in Oshkosh, WI

Gastroenterology • Oshkosh, WI

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About

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Clinic Type

Gastroenterology

Address

2700 W 9th Ave Ste 305 Oshkosh, WI 54904

Phone

(920) 236-1630

Email

careers@ascension.org

Opening Hours

Not published — contact the clinic to confirm hours.

Website

https://healthcare.ascension.org/find-care/specialty/gastroenterologists/oshkosh--wisconsin

Emergency Care

If you are experiencing a life-threatening emergency, call 911 or go directly to the ER.

Services Offered

Gastroenterology
Digestive Health
Pediatric Gastroenterology - Digestive Health

Team

Jeffrey P Andreini, MD — Gastroenterologist - Digestive Health
Katlyn S Hansen, NP — Gastroenterology - Digestive Health
Avery A Lebowitz, APNP — Gastroenterology - Digestive Health
Sudeep S Sodhi, MD — Gastroenterology - Digestive Health
Sarah N Bertzyk, NP — Gastroenterology - Digestive Health
Samuel L Ricker, PA — Gastroenterology - Digestive Health
Alan N Mayer, MD, PhD — Pediatric Gastroenterology - Digestive Health

Insurance & Payment

—

Languages Spoken

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Social Media

Youtube Facebook Linkedin Instagram

Photos

What Patients Say

Overall sentiment across review platforms: mixed

WebMD: 5.0/5.0 (27 ratings)
U.S. News & World Report: 5.0/5.0 (67 ratings)
Healthgrades: 3.8/5.0 (14 ratings)
U.S. News & World Report: 4.0/5.0 (28 ratings)
Healthgrades: 2.7/5.0 (7 ratings)
Vitals: 5.0/5.0 (5 ratings)

Patients praise

High expertise in diagnosing and managing complex digestive conditions
Effective, compassionate, and thorough communication during procedures
Strong professional staff support in certain contexts
Positive clinical outcomes reported by many patients

Common complaints

Administrative and office communication challenges (e.g., scheduling, insurance/authorization issues, staff demeanor)
Mixed experiences with bedside manner and listening skills for some providers
Difficulty securing appointments due to network/insurance changes

"Walking in I was very nervous but Dr Janu made sure to make my nervous go away. He explained everything to me and answered all the questions that I had."

— WebMD patient review of Dr. Peter Janu

"I can honestly say that Dr. McDonald and her staff were amazing. They were patient and professional from the time I scheduled my appointment to my procedure."

— Healthgrades patient review of Dr. Mary McDonald

"Potentially, Dr. Butt's "hunch" saved my life."

— Healthgrades patient review of Dr. Amir Butt

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. Own this clinic? Claim or correct this listing.