Love my doctor who saw my mom and grandma and who also takes care of my husband. I hope he never retires. Sometimes the wait is toooo long :-/ but you always feel like you are cared about and listened to.

Dr. Diener is one of the brightest, congenial, knowledgable and caring primary care physicians I have ever had in my lifetime. It is no understatement to say that his insights are life-saving. On average, reception staff has been in the top 25% of doctors staffs with whom I have dealt.

As a long-time patient of Dr. Dieners, and as a retired NIH scientist who has worked for decades with world-class physicians and scientists from all over the planet, I testify that primary health care does not get any better than this. Top-shelf medical practice. I am very fortunate to be Dr. Dieners patient.

Excellent care and diagnosing. Thorough. Long wait sometimes.

Dr. Diener has been our primary physician for more years than I can remember. He is absolutely outstanding. A wonderful manner,listens to patient descriptions of ailments attentively, recommends additional tests or procedures as appropriate, but will also tell the patient when he believes a wait and see attitude for an ill is what will probably be the best course. Asks about yearly flu vaccinations and other shots, whether Ive visited specialists I see recently, whether Ive had recommendd procedures performed. Dr. Diener and the practice he is associated with will recommend good specialists inside or outside their group when a specialist is needed. These specialists have always been in the Columbia area, and in my experience have always been very good physicians.

The office staff are extremely unhelpful and dismissive. I work in the healthcare field and I show respect to each and every client whether it be over the phone or in person. I will miss my Primary Care Physician but the staff is deterring me from returning.