Dr. Christopher N. Dainiak, MD | LONDONDERRY, NH | Gastroenterology

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Dr. Christopher Dainiak is a gastroenterologist with expertise in internal medicine and surgery who has been practicing for 28 years. He earned his medical degree from the University of Connecticut School of Medicine and completed his residency at Norwalk Hospital. His comprehensive training across multiple specialties allows him to provide both medical and surgical care for digestive health conditions. Dr. Dainiak speaks English and brings nearly three decades of clinical experience to his practice.

Dr. Dainiak is affiliated with Catholic Medical Center and Parkland Medical Center, with practice locations in Londonderry, Derry, and Bedford, New Hampshire. He specializes in treating colon polyps and diverticular disease, along with gastritis and other digestive disorders. His procedural expertise includes performing colonoscopies and lower gastrointestinal endoscopy with sedation services. Patients have given him an average rating of 4.0 out of 5 stars on Vitals, reflecting their …confidence in his care.

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AI-generated from data on this provider profile.

4

23 Ratings
28 years of experience
speaks English
Norwalk Hospital
16 written reviews
3 specialties
12 areas of expertise
3 board certifications
2 hospital affiliations
3 office locations
Male

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me

Based on patient feedback. Read the reviews

Dr. Dainiak's Ratings and Reviews

4

23 Ratings with 16 written Reviews

Average Wait Time 9 Minutes

How was your appointment with
Dr. Dainiak?

Patients’ Perspective

Gave an accurate diagnosis: (13) Did WellNeeds Improvement (1)
Had a good bedside manner: (14) Did WellNeeds Improvement (2)
Spent time with me: (14) Did WellNeeds Improvement (2)
Provided follow-up after the visit: (13) Did WellNeeds Improvement (1)
Flexible scheduling: (15) Did WellNeeds Improvement (0)
Saw me in a timely manner: (1) Did WellNeeds Improvement (0)
Staff was courteous: (1) Did WellNeeds Improvement (0)

Patients express overwhelming positivity about Dr. Christopher N. Dainiak, highlighting his kindness, knowledge, attentiveness, and excellent bedside manner. Many reviews emphasize his ability to carefully listen, make patients feel comfortable, and thoroughly explain medical conditions, earning their trust and high recommendations. Although the dataset does not contain explicit negative reviews, the emphasis on gratitude for finding such a capable doctor suggests high satisfaction levels with no notable complaints.

AI-generated from the text of patient reviews

23 ratings & reviews

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Showing 1 to 10 of 16 reviews

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Very kind and friendly along with being knowledgeable. Would highly recommend him to anyone. A+++

March 17th, 2026

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Dr. Dainiak is incredibly patient, compassionate and knowledgeable. He is clearly an expert in his field.

January 7th, 2026

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I have seen Dr.Daniak for many years. He is very good. I would recommend family and friends to see him.

December 17th, 2025

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I have been seeing Dr. Dainiak for years for my colonoscopies and Endoscopies. He is always pleasant, always shows interest and concern about what I am saying, is attentive and respectful. I have never had a complication after a procedure and communication from his office with results is always timely. I have not one negative thing to say about him. I am a nurse of over 25 years and highly recommend him.

October 24th, 2025

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Dr. Dainiak treated me for an endoscopy and colonoscopy about ten years ago. He put me on a medication that worked well all this time. I have recently become ill and went right in to see him. After speaking with him, he has diagnosed my illness. He has an excellent bedside manner, asks questions and listens to me. I'm still in the middle of my illness, but I can assure you, I have 100% faith in Dr. Dainiak. He is one of the best doctors that has ever treated me. I highly recommend him. Thank you Dr. Dainiak for your knowledge and kindness.

October 15th, 2025

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I had a great experience with Dr. Dainiak. he was thorough, attentive and truly cared about my concerns. He took the time to explain everything in detail, making sure I felt comfortable and informed I would highly recommend him.

October 2nd, 2025

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Dr Daniak is one of the best doctor that I have found. He knows what he is talking about and can easily explain it to you. The only thing that I regret is that it took me so long to find him.

August 28th, 2025

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I met with Dr. Dainiak recently. I can honestly say that he was the nicest doctor I have ever seen. (I'm 71, so that's a lot of doctors!) My husband, who was with me, agreed. He listened carefully and answered all my questions. I was very pleased with my appointment.

August 18th, 2025

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He put me at ease and never made me feel rushed. He asked several times if I had questions and his staff was so kind and efficient

August 14th, 2025

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I have had two endoscopy’s and a colonoscopy with Dr. Dainiak. He has been amazing, his staff at his office and surgical center are top notch. Grateful I found him as a doctor.

July 23rd, 2025

Granite State Gastroenterology

50 MICHELS WAY STE 204LONDONDERRY, NH 03053

Mon8:00 am - 5:00 pm

Tue8:00 am - 5:00 pm

Wed8:00 am - 5:00 pm

Thu8:00 am - 5:00 pm

Fri8:00 am - 5:00 pm

SatClosed

SunClosed

Surgical Center Of New Hampshire At Derry

15 Tsienneto RdDerry, NH 03038

Tel: (603) 460-4955

Mon7:00 am - 5:00 pm

Tue7:00 am - 5:00 pm

Wed7:00 am - 5:00 pm

Thu7:00 am - 5:00 pm

Fri7:00 am - 5:00 pm

SatClosed

SunClosed

Granite State Gastroenterology

160 S RIVER RD STE 2300BEDFORD, NH 03110

Tel: (603) 432-8802

Mon9:00 am - 5:00 pm

Tue9:00 am - 5:00 pm

Wed9:00 am - 5:00 pm

Thu9:00 am - 5:00 pm

Fri9:00 am - 5:00 pm

SatClosed

SunClosed


Dr. Christopher N Dainiak, MD	Chimdi Mfebe, APRN	Dr. Paul David Weinstein	Dr. John G Kemp
Gastroenterology	Gastroenterology	Emergency Medicine	Anesthesiology
	Accepts New Patients
4 (23 Ratings)	0 (0 Ratings)	1 (1 Rating)	0 (0 Ratings)
28 Years of Experience		49 Years of Experience	63 Years of Experience
No Virtual Visit Option	Virtual Visit Available	No Virtual Visit Option	No Virtual Visit Option
Speaks English	Speaks English	Speaks English	Speaks English
LONDONDERRY , NH	Little Rock , AR	Lawrence , MA	Hershey , PA
Med School: University Of Connecticut School Of Medicine	Med School: Chamberlain University College of Nursing	Med School: University Of Massachusetts Medical School	Med School: University Of New England College Of Osteopathic Medicine
Current Profile	View Profile	View Profile	View Profile

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Abdominal Pain
Acid Reflux Disease (Gastroesophageal Reflux / GERD)
Acid Reflux Disease (GERD)
Celiac Disease
Colonoscopy
Constipation
Hemorrhoids
Hepatitis C
Internal Medicine
Irritable Bowel Syndrome (IBS)
Surgery
Ulcerative Colitis

MEDICAL LICENSE

Medical Doctor, New Hampshire, 2026, Active

EDUCATION & TRAINING

Residency

Norwalk Hospital

Medical School

University Of Connecticut School Of MedicineGraduated in 1998

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Is Dr. Christopher Dainiak accepting new patients?: Dr. Christopher Dainiak has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
How can I make an appointment with Dr. Christopher Dainiak?: You can find contact information for Dr. Christopher Dainiak here on Vitals.
What languages does Dr. Christopher Dainiak speak?: Dr. Christopher Dainiak speaks English.
Does Dr. Christopher Dainiak accept my insurance?: You can see the insurance plans that Dr. Christopher Dainiak accepts on their Vitals profile.
Where is Dr. Christopher Dainiak's office located?: Dr. Christopher Dainiak's office is located at 50 MICHELS WAY STE 204, LONDONDERRY, NH, 03053.

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