Dr. Christopher N. Dainiak, MD | Londonderry, NH | Gastroenterologist

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Dr. Christopher Dainiak treats colon polyps, GERD, and gastritis, and performs colonoscopy, lower GI endoscopy, and upper GI endoscopy. He practices gastroenterology, internal medicine, and surgery, and has 28 years of experience.

Dr. Dainiak earned his medical degree from the University of Connecticut School of Medicine and completed his residency at Norwalk Hospital. He is affiliated with Catholic Medical Center and Parkland Medical Center, and sees patients in Londonderry, Derry, and Bedford, New Hampshire.

Overview based on verified provider data

4

24 Ratings
28 years of experience
speaks English
Norwalk Hospital
17 written reviews
3 specialties
12 areas of expertise
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

24 Ratings with 17 written Reviews

Average Wait Time 9 Minutes

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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 frequently commend Dr. Christopher N Dainiak for his warm professionalism, compassionate nature, and thorough attention to their medical concerns, which contributes to a high level of comfort during consultations. He is often described as exceptionally knowledgeable, with effective diagnosis and treatment approaches, and his communication is highly appreciated. The reviews highlight that there are no reported negative aspects of his practice, indicating overall satisfaction and high recommendations from patients. His staff are also praised for their kindness and efficiency, further enhancing the patient experience.

AI-generated from the text of patient reviews

24 ratings & reviews

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Showing 1 to 10 of 17 reviews

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Dr.Daniak has a warm professional manner which puts one at ease. And it is very helpful when you don't feel rushed as can often be the case with medical appointments. Thank you.

July 28th, 2026

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

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling
Saw me in a timely manner
Staff was courteous

Needs Improvement

March 17th, 2026

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

Did Well

Had a good bedside manner
Spent time with me
Flexible scheduling

Needs Improvement

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.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling

Needs Improvement

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.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling

Needs Improvement

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.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling

Needs Improvement

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.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling

Needs Improvement

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.

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling

Needs Improvement

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.

Did Well

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

Needs Improvement

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

Did Well

Gave an accurate diagnosis
Had a good bedside manner
Spent time with me
Provided follow-up after the visit
Flexible scheduling

Needs Improvement

August 14th, 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. Steven George Crespo, MD	Dr. John Joseph Sullivan, MD
Gastroenterology	Gastroenterology	Emergency Medicine	Psychiatry
	Accepts New Patients		Accepts New Patients
4 (24 Ratings)	0 (0 Ratings)	0 (0 Ratings)	0 (0 Ratings)
28 Years of Experience		41 Years of Experience	57 Years of Experience
No Virtual Visit Option	Virtual Visit Available	No Virtual Visit Option	No Virtual Visit Option
Speaks English	Speaks English	Speaks English, Spanish	Speaks Polish, Spanish
Londonderry , NH	Little Rock , AR	Methuen , MA	Wilmington , MA
Med School: University Of Connecticut School Of Medicine	Med School: Chamberlain University College of Nursing	Med School: Perelman School Of Medicine At University Of Pennsylvania	Med School: Tufts University School Of 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

Dr. Christopher N Dainiak holds an expired medical license in the state of New Hampshire.

Medical License

Medical Doctor with an expired medical license in the state of New Hampshire that expired in 2026.

Education & Training

Residency

Completed their residency at Norwalk Hospital.

Medical School

Graduated from University Of Connecticut School Of Medicine in 1998.

NPI Number

Dr. Dainiak's NPI number is 1710942354.

Judith A Rojcewicz
Emergency Medicine
45 Years Exp | Lowell, MA
(0)
Katherine Rosemary Sullivan
Pediatrics
7 Years Exp | Washington, DC
(0)
Cheryl Ann Martin
Family Medicine
15 Years Exp | Lawrence, MA
(0)
Andreas Thunbo Christensen
Diagnostic Radiology
8 Years Exp | Nashua, NH
(0)
Dr. Astrid Lissette Gutierrez, MD
Emergency Medicine
19 Years Exp | Lawrence, MA
(0)
Dr. Francis Xavier Zambetti, MD
Nephrology
49 Years Exp | Fitchburg, MA
(0)
Dr. Shweta Gupta, MD
Critical Care Medicine
21 Years Exp | Manchester, NH
(0)
Dr. Christopher Wood Slusher, MD
Emergency Medicine
44 Years Exp | Manchester, NH
(0)
Dr. Apara Ramesh Dave, MD
Infectious Disease
18 Years Exp | Exeter, NH
(0)
Dr. Julia C Tyler
Nurse Practitioner
| Chelmsford, MA
(0)

Where is Dr. Christopher Dainiak's office located?: Dr. Christopher Dainiak's office is located at 50 Michels Way Ste 204, Londonderry, NH, 03053.
Which hospitals is Dr. Christopher Dainiak affiliated with?: Dr. Christopher Dainiak is affiliated with Catholic Medical Center and Parkland Medical Center.
Does Dr. Christopher Dainiak accept my insurance?: You can see the insurance plans that Dr. Christopher Dainiak accepts on their Vitals profile.
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.
What languages does Dr. Christopher Dainiak speak?: Dr. Christopher Dainiak speaks English.

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