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Thomas C Gniadek, MD

Endocrinology, Diabetes & Metabolism, Internal Medicine

Provider Groups

  • Trinity Health Of New England Medical Group

  • Trinity Health Of New England Care Alliance

Primary Contact

203-755-7711
Provider Groups
  • Trinity Health Of New England Medical Group

  • Trinity Health Of New England Care Alliance

Primary Contact
203-755-7711

Services & Specialties

Areas of Specialization

  • Endocrinology, Diabetes & Metabolism
  • Internal Medicine

Clinical Interests

Conditions Treated

  • Endocrinology, Diabetes & Metabolism
  • Diabetes
  • Diabetes and Endocrinology

Locations & Contact

Primary Location

Prospect Diabetes and Endocrinology

166 Waterbury Rd
Ste 202
Prospect , CT 06712

Additional Resources

Education & Certifications

Education

Education:
Fairfield University (1972)

Education:
University of Connecticut (1976)

Internship:
Saint Mary's Hospital (1977)

Residency:
Saint Mary's Hospital (1979)

Fellowship:
University of Michigan Hospitals & Health Centers (1981)

Board Certifications

Endocrinology, Diabetes & Metabolism, Endocrinology, Diabetes & Metabolism, American Board of Internal Medicine Subspecialty (1981)

Endocrinology, Diabetes & Metabolism, Endocrinology, Diabetes and Metabolism, American Board of Internal Medicine Subspecialty (1981)

Internal Medicine, Internal Medicine, American Board of (1979)

Provider Groups

Trinity Health Of New England Medical Group

Trinity Health Of New England Care Alliance

Provider Ratings

The following ratings and reviews are based on verified feedback collected from independently administered patient experience surveys. The ratings and comments submitted by patients reflect their own views and opinions. Patient identities are withheld to ensure confidentiality and privacy. Learn More >

4.9 out of 5

(323 ratings)

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

262 Reviews

10/15/2024

Always most helpful, and caring.

10/15/2024

Dr Gniadek is the best, don’t loose him. I think he’s the smartest person I have ever met!

10/10/2024

Excellent experience

10/09/2024

Doc G, is always friendly,, and knowledgeable.. trust him fully!!!

10/08/2024

Dr.Gniadek is one of the most competent doctors I have ever met. He is also deeply compassionate.

10/03/2024

Dr Gniadek is a very caring professional and spends a lot of time explaining medications to me etc.

10/02/2024

Dr Gniadek always explains things in a manner I can understand.

10/02/2024

Dr. Thomas Gniadek is a wonderful physician. I enjoy being a patient and I hope he never retires!

09/26/2024

Always professional and listened to my remarks.

09/24/2024

Dr Gniadek is excellent

09/24/2024

Dr. Gniadek is a dedicated, compassionate, astute doctor. He is exceptionally smart.

09/19/2024

The best

09/17/2024

Keep up the Good Work! Thank you!

09/12/2024

Fantastic !!!!

09/11/2024

You are blessed to have Dr. Gniadek on your staff, as well as I am.

09/03/2024

Very good

08/21/2024

I have been a patient of Dr. Gniadek for many years and he has always listened to my concerns and took his time with me.

08/20/2024

Excellent experience

08/15/2024

Already stated

08/15/2024

The Last 2 sets of questions were repetitious of the earlier questions, and as I have already said, Dr. Gnaidek is the best

08/13/2024

Same outstanding care provider for his patient who he has seen, addressing all and any issue regarding overall health as the patient advances with Alzheimer's. The care is precise, genuine and empathetic.

08/06/2024

He's kind, considerate & a genius. His "genius" saved my life twice over the many yrs. I have gone to him. He's on top of things for sure!!

08/06/2024

The best

07/25/2024

Dr Gniadek is the best would recommend him to everyone

07/25/2024

Great!!!

07/24/2024

Dr. Gniadek Is the best he is super knowledgeable and takes the time to explain so you fully understand any questions you may have he is excellent in what he does

07/17/2024

Excellent

07/10/2024

Dr. Gniadek always has an answer for anything I ask him. I can never imagine having to see anyone else.

07/10/2024

Dr. Gniadek is a very good Dr.

07/09/2024

Dr. Gniadek spends the time necessary with me and explains things very well 😊

07/09/2024

I've been with Dr. Gniadek for about 40 years. I have always found him to be kind, professional, well versed in many areas and an excellent doctor.

07/09/2024

Dr G is the best

06/18/2024

Dr. Gniadek is a wonderful doctor

06/13/2024

I trust Dr.Gniadek completely, more than any other doctor I have had in the past.

06/12/2024

Always concerned and is on top of new procedures for my diabetes

06/11/2024

Dr. Gniadek always provides quality health care. I’ve been with this practice for many years as a result of his care and his excellent staff.

06/11/2024

Dr. Gniadek understands and always handles my visit with respect and help.

06/05/2024

He answered all my questions and concerns

06/05/2024

Excellent md-you lose him there are very few left as ingtelligent as Dr Gniadek

06/04/2024

Great doctor.

05/30/2024

Always listens

05/23/2024

He’s so caring and very down to earth and explaining everything so you know and feel comfortable with all testing and everything else

05/15/2024

I have the greatest confidence is Dr. Gniadek's care.

05/09/2024

Have been going to this provider for years and he also treated my husband. He is awesome!

05/02/2024

Superior as always

04/30/2024

took very good care of me

04/24/2024

very professional

04/24/2024

All Great

04/24/2024

nice

04/23/2024

Good

04/17/2024

Simply excellent

04/16/2024

Outstanding!

04/16/2024

Everyone from this office takes their jobs seriously and always acts professional and courteous.

04/11/2024

Very positive

04/10/2024

Dr. Gniadek is GREAT!

04/09/2024

Thank you Dr. Gniadek and Team for the exceptional care you provided to me!

04/02/2024

Dr. Gnaidek honestly listens to patients. When I have an appointment with him, I always feel heard and respected. He is one on the most compassionate physicians I have ever known.

03/26/2024

No issues

03/26/2024

Great!

03/21/2024

Waited one hour before seen

03/20/2024

Always gives me the time and help that I need

03/14/2024

Dr. Gniadek is a very careing doctor. I am very comfortable with him because he listens and explains everything to me

03/13/2024

Professional and caring.

03/07/2024

Always listens to my health questions and provides results.

03/07/2024

Dr. Ganiadek is very thorough and the staff is excellent

03/07/2024

Always patient , knowledgeable and explains in detail all information, recommendations ect

03/06/2024

There is no one better. Thank you for caring about us and giving me such good health care that you actually saved me from going through cancer. That’s amazing! Thank you

02/29/2024

Dedicated, very knowledgeable.

02/22/2024

I am satisfied with Dr. Gnaidek as my primary physician.

02/21/2024

Exceeded my expectations.

02/06/2024

I need Dr. Gniadek to stay my endocrinologist. I cannot afford out of Network prices for care. Please put Cigna back into Network with Trinity Health

02/01/2024

He is a very professional and caring.

02/01/2024

If Dr. Gniadek wasn’t the best, do you really believe I would still see him as my doctor

01/31/2024

Dr Gniadek, I have been a patient for over 30 years. Dr has taken care of me excellent. There is no better! I trust him with all my medical situations.!

01/30/2024

Trust in a provider is so important, and Dr. Gniadek has my complete trust.

01/25/2024

Dr Gniadek is terrific.

01/24/2024

Very thural and concerned about my health

01/23/2024

excellent

01/23/2024

I don’t have a problem with Dr Gniadek, it was just I waited just about an hour past my appointment time to see him.

01/16/2024

extremely professional

01/11/2024

the doctor cares about you

01/11/2024

Cannot say enough GOOD things about Dr GNIADEK & his staff.

01/11/2024

Maybe additional office help

01/10/2024

i feel very comfortable ,100 % with this provider

01/09/2024

Dr. Gniadek always listens to my concerns and takes the time to explain everything.

01/09/2024

Dr Gnaidek is very easy to talk to. He is patient, engaging and makes appointments very low stress experiences

01/09/2024

Dr Gniadek is the best in my opinion and have been a longtime patient of his

01/04/2024

Dr. Dr. Gniadek is a truly caring and extremely smart doctor. We should have more like him.

01/03/2024

I have been treated by Dr Gniadek for many years. He is real professional and knowledgeable physician.

01/03/2024

He is a very understanding & good Dr

01/03/2024

My experience with the provider has been totally positive for years

01/03/2024

Great practice.

01/02/2024

I love Dr. Gniadek's practice, everyone is very professional, and friendly.

12/19/2023

His listening to me helped me out in many medical "situations." He's a genius, God bless him!

12/19/2023

He answers my question and he cares

12/12/2023

I came from my current home in Cape Cod to see him.

12/12/2023

Love Dr. Gniadek ............been seeing him for at least 30 yrs.

12/12/2023

I said it all n all - very good

12/05/2023

I have always felt that Dr. Gniadek is a compassionate excellent care provider.

12/05/2023

Always listens and gets to the problem

11/29/2023

Empathetic, understanding and informative.

11/29/2023

Excellent doctor and excellent staff

11/28/2023

Always the best care

11/24/2023

Has an excellent Dr. to patient relationship.

11/23/2023

A pleasant experience

11/18/2023

Listens to you!!!

11/18/2023

Have not experienced any problems.

11/17/2023

They're a bunch of really well trained people who know their jobs

11/16/2023

Dr Ginadak takes his time explains everything to you and keeps u up dated with latest treatment

11/09/2023

He makes it feel like you are only patient

11/04/2023

Great

11/04/2023

They are the best

11/02/2023

Has been my doctor for 33 years. Always great to deal with.

10/28/2023

Not only is Dr. Gniadek a top notch doctor but his assistant and office staff are very warm welcoming people. The office and examining rooms are extremely clean.

10/24/2023

Doctor Gniadek is a great Doctor & Staff

10/23/2023

Great!

10/21/2023

everyone who I encountered, was nice. I would gladly recommend to my family and friends.

10/21/2023

Thank you for caring and showing that not all doctors are just concerned with making money and actually care about your patients living a fulfilled quality life.

10/14/2023

I would recommend this provider to anyone.He is smart,explains everything thoroughly and is patient with my questions

10/13/2023

Like i said beofore, he is an amazing doctor

10/09/2023

My concerns are always addressed with the best of care.

10/06/2023

I did not feel rushed and he listened to my concerns.

10/05/2023

Dr Gniadek is wonderful. He is like a medical encyclopedia.

10/05/2023

Dr. Gniadek is always aware of new medical research results and able to answer questions about issues relevant to the health of his patients.

10/04/2023

Been going to this Dr. since 1985. That is good care.

10/02/2023

Excellent doctor very thorough

10/02/2023

Dr Gniadek has been my Dr for better than 10 years and I trust no other dr as much as him! He is extremely knowledgeable and well versed in all medical areas he has kept my diabetes under excellent control for the entire past decade! I was referred to Dr Gniadek and will continue to refer my friends and family!!

09/29/2023

I wish there were numbers higher than 10 to rate him.

09/28/2023

I appreciate and respect Dr Gniadek very much

09/26/2023

My doctor is brilliant and I trust him fully. I am lucky to have him as my provider.

09/21/2023

He saved my life; I love and respect his opinion.

09/19/2023

From my first visit many years back, till my last visit, Dr. Gniadek has always given me the best service possible!

09/16/2023

Dr Gniadek is the Best

09/14/2023

He has always been a great doctor.

09/14/2023

Wonderful wonderful

09/10/2023

Care is always excellent always

09/10/2023

Dr Gniadak listens and explains everything he's doing makes sure you know what you need to do

09/08/2023

Very thorough and explains everything

09/05/2023

I have been with Dr Gniadek for at least 35 years. In that time, I have always felt comfortable seeing the doctor for physicals and any other health issues that have come along. He listens

09/01/2023

I was able to understand everything he explained and he cares about the patient.

09/01/2023

Dr. Gniadek is a great doctor.

09/01/2023

I love this practice and couldn’t get better care

08/26/2023

Excellent

08/24/2023

Best 👌

08/24/2023

Comfortable visit.

08/23/2023

Very caring.

08/22/2023

Doctor Gniadek is a great doctor . He knows his profession very well. We are very comfortable with his explanations and knowledge of our medical conditions. We are glad to have him. All his staff is very caring, as well.

08/17/2023

Doctor Gniadek is a very knowledgeable physician who cares about his patients. Trinity needs more like him.

08/12/2023

Thank you Dr. Gniadek. You are an awesome doctor.

08/11/2023

I dread the day he retires. He is the best!

08/10/2023

Dr. Gniadek has been my primary for 30 years. I think that says what I think of him. He listens and responds to the patient.

08/10/2023

He just the best

08/08/2023

Dr Gniadek is extremely knowledgeable and able to respond to any questions that I raise.

08/06/2023

I did above. He is like the Old-fashioned doctor who made house calls because he truly cares about his patients. They don’t come like him anymore!

08/03/2023

He's AWESOME

07/30/2023

Very professional. He explained to a T , about any questions I asked .

07/29/2023

Excellent!!!

07/25/2023

Great experience each & every time I see Dr. Gniadek!

07/22/2023

Superior

07/18/2023

I will continue to see Dr. Gniadek until he retires. Not looking forward to that day as he is very thorough and compassionate.

07/14/2023

Excellent

07/14/2023

Doctor Gniadek has been treating me for years and he always has a solution for me.

07/13/2023

Dr. Gniadek has been my doctor for many years and I feel like he knows me and my health issues and always takes time during an exam to address all my concerns.

07/13/2023

Staff kind caring and very professional

07/08/2023

Dr. Gniadek has been my primary doctor for 40+ years. I am and have been very pleased with this practice. Dr. Gniadek is friendly, diplomatic, caring and professional in all matters.

07/06/2023

He is the best!

07/05/2023

Dr. Gniadek has been my PCP for many years. I trust him implicitly and he is a leader of my health team.

06/30/2023

He takes time with you ,explaining and answering any questions

06/29/2023

Overall satisfied

06/23/2023

he cares about me

06/22/2023

Dr Gniadek is one of a kind. .Excellent MD.

06/13/2023

Provider always explains his plan of action moving forward with your treatment

06/09/2023

Dr. Gniadek is a special, one of the best doctors, we are pleased to be his long time patients

02/28/2023

Very satisfied with dr

02/28/2023

I'm satisfied with Dr. Gniadek.

02/23/2023

I’ve been Dr. Gniadek’s patient for over thirty-five years.

02/22/2023

Excellent PCP

02/21/2023

I am very glad and happy that Dr Gniadek and his staff are there for me

02/18/2023

Excellent provider

02/17/2023

Dr. Gniadek is thorough in his ordering of testing.

02/17/2023

very nice to me

02/17/2023

He is a superb internist and speciliast in endrocronoligy

02/17/2023

Dr. Gniadek is a wonderful provider and teaches you about Type II Diabetes at every appointment that I have with him.

02/17/2023

Great doctor

02/16/2023

He is kind and he truly cares about his patients

02/16/2023

Outstanding

02/16/2023

He's one of the best & smartest doctors I have ever dealt with.

12/25/2022

Dr Gniadek and staff work very well together

12/23/2022

Dr Gniadek answers questions and is thorough

12/22/2022

He explains everything, goes over all tests results. He is kind caring and the best doctor

12/22/2022

Dr Gniadek and his staff have always been wonderful to me and I feel that I am well cared for by all in the office

12/21/2022

As far as I'm concerned, he saved my life. When examining me, he found something that another dr. wouldn't have. He's very thorough.

12/20/2022

Superior, exceeds all expectations.

12/19/2022

SUPER!!!

12/14/2022

Always has my best interest in dealing with any issues.

11/24/2022

Their knowledge, patience, and understanding have made it one of the best experiences I’ve had, and helps me maintain confidence and willingness to share in my own healthcare

11/23/2022

He isalways interested in my needs and problems

11/21/2022

I hope Dr Gniadek never retires. He is the best!!!

11/20/2022

Dr. Gniadek is an intelligent, caring doctor who takes time to listen thoroughly to my concerns and always has a suggestion or solution.

11/19/2022

I had some test results and Dr Gniadek explained everything to me with care and compassion.

11/19/2022

If you have a new diagnosis he explains it

11/19/2022

Dr. Gniadek is one of the best physicians I've ever gone to.

11/18/2022

I have been a patient of Dr. Thomas Gniadek for many years. I have full confidence and trust in his care for me. We work as a team. He is very thorough and knowledgeable. He stays on top of everything that is current.

11/16/2022

they were very nice

11/16/2022

I have always relied on Dr G for everything. Anytime I had a question he was there

11/15/2022

I found Dr Gnaidek very knowledgeable & caring. I have great confidence in his plan for my care.

11/14/2022

Very thorough, very concerned, very knowledgeable

10/30/2022

I trust him and am very comfortable with him.

10/29/2022

Dr. Gniadek's office is always caring and professional when I have asked questions and scheduling appointments.

10/29/2022

I trust Dr. Gneidek as he is one smart caring doctor.

10/28/2022

Wonderful doctor and staff

10/27/2022

Very knowledgeable and caring

10/26/2022

I LOVE Dr Gniadek, he is the best doctor I know.

10/26/2022

I wish all doctors were as incredible as Dr. Gniadek. Many years of outstanding care!

10/24/2022

Took Plenty of time to address all my needs and concerns.

10/21/2022

Keep up the good work

10/20/2022

He is very good and takes the time to listen

10/19/2022

Dr is VERY thorough.

10/18/2022

Well satisfied

10/15/2022

The doctor is extremely knowledgeable caring and explains in great detail and very easy to understand

10/13/2022

Excellent care from Dr. Gniadek. I've been a patient of the doctors for many years and always get exceptional. Would highly recommend this doctor! Bravo!!!.

10/07/2022

Easy in, great feed back, easy out

10/07/2022

Perfect!

10/06/2022

Awesome Physician

10/02/2022

Dr Gniadek and office staff were very professional caring and extremely helpful to care for me

10/02/2022

Very Pleased

09/30/2022

Very good.

09/30/2022

will not ever change my provider. Dr Gniadek and office staff is the best!

09/29/2022

Dr Gniadek and the staff are very helpful and welcoming the office works perfect do not change anything it will make us patients very unhappy it’s working

09/24/2022

From my first visit everyone has been courtesy and helpful

09/23/2022

Amazing

09/14/2022

Great

08/29/2022

Dr. Gniadek has provided me the outstanding care for over a decade. Very concerned, personable, never rushed, explains everything very clearly. An extremely knowledgeable and exceptional caregiver!

08/24/2022

Excellent care.

08/24/2022

He is a wonderful, intelligent doctor who listens & then some!

08/22/2022

Easally understood my problem

08/21/2022

Dr Gniadek is a geart doctor!

08/19/2022

Tom is the best.

08/14/2022

My wait time wasn't very long and he always treats me with respect.

08/12/2022

I feel safe and confident with him incharge of my health

08/12/2022

I would highly refer this physician and associates.

08/08/2022

A extremely caring doctor.

08/06/2022

He's very thorough in explaining any tests and their results.

08/03/2022

Perfect

08/01/2022

All in all very posative expreiance

08/01/2022

The best care anywhere and things are explained on our level in order to understand health and nutrition.

07/30/2022

Staff is great

07/29/2022

Very thorough

07/29/2022

DrGniadek is SO knowledgeable and up to date on the latest information. He is encouraging and non judgemental. He always helps!

07/28/2022

Very helpful. Took the time to explain things. Showed concern with my issues.

07/27/2022

Happy with the doctor and staff

07/23/2022

Reviews all lab results in detail

07/22/2022

Excellent!

07/20/2022

Great Doc!!

07/16/2022

excellent care

07/16/2022

Only doctor i trust

07/16/2022

Love Dr. Gniadek and his MA

07/15/2022

Enjoy going

07/15/2022

The best doctor

07/14/2022

The staff is very professional

07/14/2022

Dr. Gniadek has been my Endocrinologist so approximately seven years. He instills confidence.

07/08/2022

Dr. Gniadek is someone who cares. He asks questions about my health. He is very knowledgeable about the insulin pump, diabetes, the current diabetes advancements. He looks up recent tests done and if any concerns will let you know. He provides the physical exam at each visit and compares them with the last exam and will verbally comment on the recent exam and the results. I trust my diabetes care to Dr. Gniadek like I have for the past 30 years with him.
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