Live
Read now

Gastroenterology & GI Lab | St. Jude Heritage Medical Group

GastroenterologyFullerton, CA

★★★★★4.8/5567 reviews across 4 platforms

Ratings by platform

  • St. Jude Heritage Medical Group Provider Profile (Dr. Patrick T. Koo): 4.7 out of 5 stars (154 ratings) (154)
  • St. Jude Heritage Medical Group Provider Profile (Dr. Sajen John Mathews): 4.9 out of 5 stars (173 ratings) (173)
  • St. Jude Heritage Medical Group Provider Profile (Jill Olmstead, NPC): 4.9 out of 5 stars (222 ratings) (222)
  • Birdeye (St. Jude Digestive Health at Knott Family Endoscopy Center): 4.5 out of 5 stars (18)

What patients say

Patients praise

  • Highly praised physicians for being kind, caring, and thorough
  • Professional and compassionate staff interactions in many instances
  • Efficient clinical processes and well-run endoscopy procedures
  • Helpful and attentive bedside manner that makes patients feel comfortable

Common complaints

  • Difficulty scheduling appointments and long hold times on the phone
  • Concerns regarding administrative/office communication and follow-up directions
  • Occasional negative patient interactions with specific providers or staff members
  • Reports of perceived lack of thorough examination or limited telehealth-only consultations in some instances

In patients' words

"OMG, I was on hold for 45 minutes... Finally after 45 minutes I reached Jennifer and all she said was Dr. Yoon has to call me back maybe next Tuesday (this is Friday). This is just unacceptable."

Patient review on LocalityBiz

"Jill always goes above & beyond the call of duty for me! Suggesting health recipes, exercises anything to help me & not only my GI Health but my all over health."

Patient review on St. Jude Heritage Medical Group provider profile

"Dr. Matthew's is so kind and caring. He always listens to me as I share my concerns and tries to give me answers I can easily understand. I am so thankful to have him as part of my care team."

Patient review on St. Jude Heritage Medical Group provider profile

How these reviews were compiled

Synthesized from public patient-review platforms as of Jul 10, 2026 — sources: [1][2][3][4][5][6][7][8].

More clinics in Fullerton

Gastroenterology

★★★★★4.8/5(1,099 reviews · 7 platforms)

Patients praise: High level of expertise and professionalism among many providers · Compassionate and friendly nursing and office staff reported by many patients.

Fullerton, CAGastroenterologymixed

St. Jude Heritage Fullerton - Gastroenterology

★★★★★4.6/5(223 reviews · 3 platforms)

Patients praise: Highly regarded individual physicians and nurse practitioners, noted for expertise and kindness · Attentive, friendly, and compassionate office staff and nursing team in many experiences.

Fullerton, CAGastroenterologymixed

Orange County Lung Center - Medicine, Pulmonologist, Copd ...

★★★★★5.0/5(55 reviews · 1 platforms)

Patients praise: high patient satisfaction with medical care · professional expertise in pulmonary and critical care medicine.

Fullerton, CAPulmonologymixed

Family Medicine | St. Jude Heritage Medical Group

★★★★★4.9/5(10,345 reviews · 4 platforms)

Patients praise: attentive, knowledgeable, and professional physicians · clean and well-maintained facilities.

Fullerton, CAFamily Medicinemixed

St. Jude Heritage Medical Plaza Internal Medicine

★★★★★4.9/5(2,618 reviews · 2 platforms)

Patients praise: High internal patient satisfaction ratings (approx. 4.8-4.9) · Professional and caring staff noted by some patients.

Fullerton, CAInternal Medicinemixed

Rheumatology | St. Joseph and St. Jude Heritage Medical Group

★★★★★4.9/5(1,337 reviews · 2 platforms)

Patients praise: caring and compassionate care · knowledgeable and professional staff.

Fullerton, CARheumatologypositive

See all clinics in Fullerton

Comparing your options?

Browse other Gastroenterology clinics, or filter by state and specialty to compare patient ratings.

More Gastroenterology clinics