On time and friendly. Explained what tests were needed and what entails and approximate duration.

Submitted Nov. 29, 2022

Dr. Diehl is by far the best Breast Surgeon!! He takes his time to meet with you and makes sure all questions answered. Would highly recommend him to anyone who is going through such a stressful and scary time in your life.

Submitted Aug. 21, 2019

I trusted Dr. Diehl and Summit Medical Group to help me during an incredibly terrifying time. In Feb 2018, he performed a biopsy on my right breast that proved to be malignant. He then performed a lumpectomy that he completely botched. He removed only a fraction of the tumor leaving over 90% of it behind including the biopsy clip - which he inserted! He then told me he thought the subsequent pathology report was wrong, that he did remove the entire tumor and that he wanted to go back in just to “prove it”. I shudder to think what he would have done if I let him. A pathologist friend, after reviewing my report and speaking with the Summit affiliated pathologist, recommended that I seek another provider. I then went to Memorial Sloan Kettering Cancer Center (MSKCC) in NYC where additional imaging showed that my tumor was still present with the biopsy clip clearly visible. They also reviewed my MRI from Summit Radiology and identified concerns in my left breast that Summit missed. The subsequent biopsy on my left breast that MSKCC performed showed precancerous lesions. I decided to have much more comprehensive surgery and reconstruction due to my fears that Dr. Diehl’s incompetence put me at higher risk of reoccurrence. When I contacted Summit Medical Group to complain about my experience and Diehl’s incompetence, their medical malpractice company told me that the care I received met Summit’s standard of care. So Summit and Dr. Diehl’s standard of care includes: not using best practice methods for locating and removing tumors; missing areas of suspicion on the MRI; causing compromised reconstruction due to scarring from botched lumpectomy; not giving any preoperative instructions; lying about their own pathology reports to protect their interests and then turning patients over to collections when they refuse to pay for malpractice (in my case for only $575); forcing patients to incur more expenses when their health insurance company refuses to cover tests done a second time (one was a $4,000 genetic test that had to be repeated once my entire tumor was finally removed) as well as subjecting patients to their rude and unprofessional insurance carrier. Please, think twice about using these people. Do your research. Too late, I found a record that Diehl settled a $500,000 malpractice claim in 2015.
And yes, I consulted medical malpractice attorneys who said that although I was the victim of malpractice, thanks to my excellent care from MSKCC, my outcome was good enough that we could not sue for high enough damages to make filing a suit feasible. So all I can do is warn others inside and outside the medical community. Facing cancer is scary. Take a deep breath and do your research. There are too many medical groups out there that put profits over people. Good luck and I wish you the best.

Submitted Aug. 16, 2019

Seems to be mostly interested in the money. Very troubling.

Submitted Jan. 16, 2017

Would highly recommend to anyone looking for a breast surgeon in the area. Had a biopsy done by Dr. Diehl and was a great experience at a not so great time. All went very smoothly and was very pleased with the results. He is not only very knowledgeable, he is also extremely kind which is hard to find these days.

Submitted Jan. 11, 2017

A very precise surgeon; a true gentleman, almost courtly in nature. Has a lot of clout at the hospital so can get test results super-fast, and his staff can get you in for MRIs and such. Very compassionate and upbeat. Truthful, but if anything, errs on the side of being upbeat. You kind of have to push to get the grimmer news, which he will give when asked directly. I had no problem with staff.

Submitted June 23, 2015

Very professional, and I am pleased with the surgery. Highly recommend.

Submitted Oct. 17, 2014

I went to Dr. Diehl because he was recommended by my oncologist. I had colon cancer. He performed the surgery via robot. He kept my family informed during surgery. He put in my power port a few weeks later. I am going back to have him remove it. I recommend him to all.

Submitted Dec. 11, 2012

Very knowledgeable. Spent a lot of time with me. Available to talk after hours/on weekend when I had questions prior to surgery (lumpectomy). Extremely happy with results.

Submitted July 27, 2011

Poor staff. My biopsy results were ready the next business day after my surgery. A week later, I was still waiting and trying to get someone to return my call.

Submitted April 17, 2011