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Clinic Type

Gastrointestinal (GI)

Address

N16W24131 Riverwood Drive, Waukesha, WI 53188

Phone

262-696-0808

Email

CustomerRelationsOnlineInquiry1@phci.org

Opening Hours

Not published — contact the clinic to confirm hours.

Services Offered

  • Gastroenterology
  • Digestive health services
  • Gastrointestinal tests
  • Colon cancer screening
  • Barrett’s esophagus treatment
  • Barrett’s esophagus
  • Crohn’s disease
  • ulcerative colitis
  • inflammatory bowel diseases (IBD)
  • Cirrhosis
  • Colorectal cancer
  • Diverticulitis
  • diverticulosis
  • Eosinophilic esophagitis
  • Gallbladder disease
  • Gastroesophageal reflux disease (GERD)
  • Hepatitis
  • Irritable bowel syndrome (IBS)
  • Pancreatitis

Technology & Equipment

  • Gastrointestinal tests
  • Barrett’s esophagus treatment

Insurance & Payment

—

Languages Spoken

  • English

FAQs

What conditions do gastroenterologists treat?

Barrett’s esophagus, Crohn’s disease, ulcerative colitis, cirrhosis, colorectal cancer, diverticulitis/diverticulosis, eosinophilic esophagitis, gallbladder disease, GERD, hepatitis, IBS, pancreatitis.

Schedule an appointment

If you need specialty care, ask your primary care provider to make a referral or find a gastroenterologist in our provider directory.

Photos

What Patients Say

Overall sentiment across review platforms: mixed

  • Healthgrades / Birdeye (Dr. David Staff): 4.8 to 4.9/5 stars (40-190 reviews)
  • Birdeye (Dr. James T. Kwiatt): 5.0/5 stars (109 reviews)
  • Vitals (Dr. Mark W. Dreyer): 4.7/5 stars (21 reviews)

Patients praise

  • Physicians are often described as thorough and attentive listeners
  • Staff members are frequently praised for being caring and helpful during procedures
  • Clear communication of medical procedures and diagnoses by many doctors
  • Patients appreciate the ease of scheduling and efficient office interactions with certain providers

Common complaints

  • Lack of follow-up communication after tests
  • Long wait times for appointments and procedures
  • Reports of dismissive attitudes or unprofessional comments by some staff/doctors
  • Issues with accurate medical charting and documentation

"Dr. Staff has a lovely sense of humor while maintaining respect and that puts me at ease. I cannot recommended him enough!"

— Healthgrades

"I'm now in to my 4th month of being sick and I still have no idea what is wrong. I had to make a "formal" complaint, before I even got a call back."

— LocalityBiz

"He misdiagnosed me with having Barretts Esophagus... Stay far away from this guy!"

— Vitals

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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