Dr. Zimmer has a friendly, knowledgeable, and courteous staff. They make every appointment enjoyable. The office technology is great with digital x-rays, appointment scheduling and reminders. Dr. Zimmer really takes time to get to know his patients. This is the best dental office I have ever been to. I would recommend Dr. Zimmer and his staff to all.

L. Casto Denver, CO

I have been going to Dr. Donald Zimmer for over 15 years and would highly recommend him to anyone! His manor is easy going conforting and professional. The office is convenient & all of his staff & hygienists are wonderful. I always fee well taken care of and confident my teeth, gums & mouth are in the best shape possible. Thank you for all my years of care.

Marisa K. Englewood, CO

Many years ago a friend referred me to Dr. Zimmer’s office when I mentioned my frustration after trying several different offices; none of which pleased me. The entire staff at Dr. Zimmer’s office is so nice, from the moment you walk in the door. Everyone greets you as you walk through, all the dental work is gentle, and Dr. Zimmer and his staff are truly interested in you. It is a close knit group there and everyone treats you like family. Going to this dentist’s office twice per year is truly as pleasant as going to the dentist could be!

Karen M. Lakewood, CO

Hi Gang,
I have been a patient with Dr. Zimmer for more years than I can recall. He’s seen me for holiday emergencies, ordinary checkups and everything in between. Dr. Zimmer and his entire staff are just the best, bar none. I now live in Mexico but still make Dr. Zimmer my regular dentist even at the cost of having to travel to Denver from Mexico, That’s just how great these folks are.

Stevie S. Los Barriles, Mexico

Dr. Zimmer & his staff are wonderful to me. They provide excellent service! I have been a patient for 12 years & am very happy.
I believe Dr. Zimmer & his staffs truly have a passion for their work & care about their patients & needs.

M. Wilson Denver, CO

I have been to many dentists in my life-time living in many states & countries. Dr. Zimmer is the best dentist I have ever been to – kind, knows his profession, is able to refer when necessary and makes a visit very pleasant. 
I thank the whole staff for taking such good care me.

T. Tallard Englewood,CO

I have been a patient at Dr. Donald Zimmer’s office for over 18 years, along with members of my immediate and extended family. We keep going back because of the excellent care and friendly staff. We feel like family there. I have tired other Dentist practices, and have felt like just another patient in a patient mill. At Dr. Zimmer’s office we feel at home, and that the staff and Dr. Zimmer truly care about our dental health as well as about us personally.
I highly recommend this practice to anyone seeking the best dental care for themselves and their families.
Best regards,

Keri B. Castle Pines North

Dear Doctor Zimmer,
I think you are a good dentist because you are gentle on my teeth. You never hurt me. You take good care of our teeth. My family thinks the same.

Ashley, Paul, Denise & Len Denver

I have been to dentists all over the U.S.A. and can honestly say your group is about the nicest one I’ve ever been involved with!

Lois D. Denver

Have been coming here for many years. The service has been excellent and the peoplevery kind and careful.

S. Mc… Denver

All the hygienists that are in your office are so gentle with our son 49. He has a brain injury and has been a handful to just brush his teeth at home. His teeth and gums are very healthy now under your care. Dr. Zimmer and his staff are so caring and our son responds well to all of you.

Thanks do much,

J. Gonzalez (Mom)

It was a pleasant experience. I was treated great and everything was done in fast and efficient fashion.

L. Baier

To whom It May Concern:

I am a fairly new patient of Dr. Zimmer's but he was recommended to me by the Schaffer family who has used his services for many years.

Dr. Zimmer recently installed two crowns for me and he and his staff were very kind, patient and professional. I don't know frankly what more you could ask.


A. Adams Littleton, CO

Our family has been going to Dr. Zimmer for the past 20 years and would not even dream of going elsewhere. Dr. Zimmer and staff are the "best in the world" in our opinion. The entire office is very friendly, caring, and kind, and they keep a very punctual schedule never making us wait to get in to see them.

I (Nanny) have had numerous fillings, crowns and even some root canals and I can say that I have never had any problems associated with any of these procedures. We all would highly recommend Dr. Zimmer and staff to anyone looking for a dentist. They are all "NUMBER ONE" in my book! :)

Nanny for all the Andersons

Dr. Donald Zimmer is a consummate professional - providing expertise with TLC. His staff is always friendly and competent. My highest recommendations.

R. Mischtie, MD

I have been a patient here since 2004. The whole staff is amazing. Everyone from the receptionists, hygienist, assistants and of course Dr. Zimmer is friend and nice. Before finding them I have tried many offices as comfort is important to me. I am so happy that I found my dentist office for life. Thank you for having the best staff and for all that you do for our family.

V. Mosbey

My daughter had a very bad experience with her first dentist. We never took her back to that dentist and she never wanted to go to any dentist ever again. Then we found Dr. Zimmer. He and his staff were/are great with my daughter, very caring and very understanding. She likes coming to the dentist now and we are so grateful.

Dixie Lakewood, CO

I have been going to Dr. Zimmer's office for many years, as well as all of my family. I can't say enough about what great care we receive! The staff is professional and friendly and Dr. Zimmer is the BEST! I high recommend their office.

Karen S.

In Addition to their expertise & skill, Dr. Zimmer & the team are incredibly friendly & very easy to work with. They are always going above and beyond.

Barb V. Patients since 1997

Dr Don is an amazing Dentist full of patience and expertise. I went through the Invisalign© process of straightening my teeth and also replacing the crowns on my front teeth. Dr. Don and his staff of professional assistants are outstanding in cosmetic dentistry and I would highly recommend their office.

Barb from Cherry Hills

I have gone to Dr Zimmer for over 25 years. My entire family has become patients of his. He and his staff always do a great job. Dr. Zimmer is always very sensitive to my fear of Dentistry.

Barbara, Aurora

After 15 years of seeing Dr. Zimmer and his staff, I can attest to the exceptional quality and care the office provides. Most people associate going to the dentist as a negative experience. My experience with Dr. Zimmer has only been positive

Brian, Denver

Dr. Zimmer and Staff:

This note is to convey my heartfelt gratitude for my newly restored smile. The Implants look fantastic, and I am so happy with them! The confidence I have when I greet people is better than it’s ever been, thanks to your office and Dr. Stone’s. Dr. Zimmer, you are a pro, with a gentle touch and genuine care for your patients. You have assembled a staff as gentle and caring as yourself. Thanks especially to Linda.

I am grateful to all of you. See you soon. (Onward to Invisalign)

Joe M., Littleton

I always feel welcome when I see Dr. Zimmer and his staff. They make me feel like family."

Thank you,

Mary B, Denver