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Gastroenterologists in Tulsa, OK

GastroenterologyTulsa, OK

★★★★★4.7/5523 reviews across 7 platforms

Ratings by platform

  • Healthgrades: 4.9/5 stars (132 ratings)
  • Healthgrades: 4.0/5 stars (149 ratings)
  • WebMD: 5.0/5 stars (73 ratings)
  • WebMD: 5.0/5 stars (64 ratings)
  • WebMD: 5.0/5 stars (45 ratings)
  • WebMD: 5.0/5 stars (45 ratings)
  • WebMD: 5.0/5 stars (15 ratings)
  • Facebook (Gastroenterology Specialists, Inc): 92% recommend (81 reviews)

What patients say

Patients praise

  • Exceptional listening skills and empathetic bedside manner
  • Thoroughness in diagnostics, treatment planning, and explaining test results
  • Competence in performing procedures like colonoscopies and endoscopies
  • Professionalism and accessibility of clinical staff

Common complaints

  • Occasional administrative difficulties, such as long wait times, challenges reaching the office by phone, or communication delays
  • Specific complaints regarding billing practices, scheduling conflicts, and perceived lack of patient release from a practice

In patients' words

"Dr. Volak has been my gastroenterologist for about 30 years... He is completely present and focused on you alone during all appointments."

WebMD review of Dr. Patrick Volak

"He listened to my concerns and answered my questions. He was very knowledgeable and I felt like I am in very good hands."

WebMD review of Dr. Matt Blankenship

"Dr. Clark is an excellent Provider. He enters the room with a smile, focuses on you and listens carefully to your symptoms and how you are feeling."

WebMD review of Dr. Christian Clark

"Refuses to release patient to see other doctor!... I immediately attempted to schedule an appointment with one of those doctors but have been unable to do so because Dr. Nightengale has refused to release me."

Healthgrades review of Dr. Mark Nightengale

How these reviews were compiled

Synthesized from public patient-review platforms as of Jul 11, 2026 — sources: [1][2][3][4][5][6][7].

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