Gastroenterology | Whittier, CA
Gastroenterology • Whittier, CA • 2 (Downey and Whittier) locations
Information from public sources; not independently verified. Confirm hours, insurance and appointment availability with the clinic.
Last gathered July 10, 2026. How our information is sourced · Report incorrect information
About
PIH Health Gastroenterology in Whittier and Downey, California offers comprehensive digestive health care including endoscopic procedures, colorectal screening, and treatment for conditions such as GERD, IBD, liver disease, and gastrointestinal cancers. The practice provides advanced diagnostic tests and coordinated care with your primary physician.
Services Offered
Technology & Equipment
Team
Insurance & Payment
Not published.
Languages Spoken
Not published.
Social Media
Photos
Photos published by Gastroenterology | Whittier, CA showing the gastroenterology practice in Whittier, CA.
What Patients Say
Overall sentiment across review platforms: mixed
- PIH Health (Dr. Renee Palta): 4.9 / 5 (598 reviews)
- House Clinic (Dr. Jiaming Zhu): 4.7 / 5 (368 reviews)
- Vitals (Dr. Robert Mecum): 3.3 / 5 (29 ratings)
- RateMDs (Dr. John J. Lah): 3.4 / 5
- WebMD (Dr. John J. Lah): 3.0 / 5 (6 ratings)
- Vitals (Dr. Ashwin Ashok): 4.1 / 5 (8 ratings)
Patients praise
- Professional and clear communication from some physicians
- Successful, painless, and well-explained procedures (e.g., colonoscopies)
- Helpful and caring demeanor reported by some patients
Common complaints
- Poor or unprofessional office staff communication (e.g., hanging up, not returning calls)
- Long wait times for appointments or procedures
- Concerns regarding billing practices and high procedure costs
- Perceived lack of attentiveness or short appointment durations
"Everything went very smoothly and painlessly. Dr. Mecum explained the procedure clearly, performed the colonoscopies without any problem, and took time to review and explain the results to us."
- Vitals (Dr. Robert Mecum review)"His staff is also very unreliable and rude. I had to hold their hand every time to make sure something was done."
- RateMDs (Dr. John J. Lah review)"He was dismissive of my pain labeling it as "butterflies" and then proceeded to practice fraudulent billing. ... Go somewhere where a doctor will care about your health more than coding your visits to get more money."
- WebMD (Dr. John J. Lah review)Synthesized from public review platforms as of Jul 10, 2026 - sources: [1][2][3][4].
In the News
- Dr. Katherine J. Kim, MD - Internal Medicine Physician in Whittier, CA - May 14, 2026
- Dr. Ausim Khan, MD - Internal Medicine Physician in Whittier, CA - May 14, 2026
- Michelle K. Le, NP - Nurse Practitioner in Whittier, CA - May 14, 2026
- Bao Sean H. Nguyen, MD - Internal Medicine | UCLA Health - Jan 29, 2026
- Dr. William A. Go, MD - Internal Medicine Physician in Panorama City, CA - May 14, 2026
Information sourced from the clinic's website as of July 10, 2026.
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