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Dr. William Diehl, MD

Dr. William Diehl, MD

Breast Surgical Oncology*
40+ years of experience

Dr. William Diehl, MD is a breast surgical oncology specialist in Florham Park, NJ and has over 40 years of experience in the medical field. He graduated from Universidad Anahuac, Escuela De Medicina in 1981. He is affiliated with Morristown Medical Center. He is accepting new patients.

4.3 Star Rating
Based on 26 reviews 4.3 Star Rating (26 reviews)

Practice

150 Park Ave Florham Park, NJ 07932

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Dr. Diehl's Reviews

Likelihood to recommend Dr. Diehl

4.3
26 ratings, 14 with a written review
5 star
81%
81%
4 star
0%
0%
3 star
0%
0%
2 star
4%
4%
1 star
15%
15%

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Excellent!!!
Dr. Diehl performed my breast biopsy. I have never been so scared in my life. I dont have a family history of breast cancer, so i didnt know what to expect. I was so emotional, in a panic. He made me feel so at ease, along with his wonderful staff. He called me with my negative results and I just need to receive my annual mammos as directed. I thanked him and just cried. I would definately recommend Dr. Diehl to family , friends or just anyone. He is a wonderful doctor, caring, understanding, and knowledgeable.
What went well
  • I felt respected
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 other person found this helpful
Helpful
Apr 26, 2024
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I was referred to Dr. Diehl in February based on a family history of breast cancer. My mammograms and ultrasounds had just been cleared, but he ordered a baseline MRI due to my history. The MRI and subsequent biopsies found that I had DCIS. If it wasn't for him, my cancer may not have been found until it had started to spread. I am so lucky to have a breast surgeon who is as knowledgeable, experienced, dedicated, and caring as Dr. Diehl to help me navigate through my cancer journey. He called me personally to help set up the different diagnostic tests along the way and when he explained that the best course of treatment in my case was a double mastectomy, both he and the Nurse Navigator Karen were incredible in helping me process the information and deal with the shock. I am so fortunate to have such an amazing doctor!!! He truly did save my life!! I am forever grateful!!
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
4 others found this helpful
Helpful
Michelle – Sep 07, 2021
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Dr Diehl was very kind and compassionate. He spent time explaining all options. He is a very very good surgeon and I am grateful for his kindness.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
3 others found this helpful
Helpful
Apr 23, 2021
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Excellent doctor. He is probably the kindest doctor I have ever encountered. He is patient and sensitive to patients needs. My mother had breast cancer and required a mastectomy. He took great care of her and was patient in answering all of our questions. He is really quite nice and so is his staff. Would highly recommend him.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
10 others found this helpful
Helpful
NJ – Jun 07, 2019
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Excellent doctor - I had breast cancer 11 years ago, and Dr. Diehl operated on me. When I had a second bout with breast cancer, I would only go to Dr. Diehl for my surgery. He is the best!
What went well
No results
What could be improved
No results
6 others found this helpful
Helpful
Feb 24, 2019
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I was treated by Dr. Diehl and would highly recommend him to family and friends if the need arises for a surgical oncologist. He was professional, knowledgeable, patient and had excellent bedside manner.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
9 others found this helpful
Helpful
Sandra Washington – Jul 10, 2018
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Excellent surgeon
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
7 others found this helpful
Helpful
Jan 25, 2018
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Steve Adams -Cedar Grove NJ I was not the patient but the husband of one. I thought Dr. Diehl during obviously a difficult time for my wife was wonderful. He was sensitive and really listened and answered all her questions.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
10 others found this helpful
Helpful
Jan 10, 2018
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I Didn’t think I would be posting again this year but i again needed a surgeon and of course I called Dr Diehl he is by far a great surgeon he has such compassion and understanding in treating the whole patient I can’t express enough the comfort I felt going into this second surgery knowing Dr Diehl would be caring for me thank you again for taking such good care of me! Sandra Willoughby
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
3 others found this helpful
Helpful
Sandra Willoughby in Branchburg NJ – Nov 15, 2017
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Dr. Diehl performed my breast biopsy. He was wonderful. He was considerate, extremely kind, knowledgeable; and I just knew I was in good hands. He did not rush me out of the office and answered all my questions. He personally called me with the results in three business days after the biopsy. Fortunately, my results were benign so I did not need further treatment except for a 6 month followup ultrasound. I would definately recommend Dr. Diehl to family and friends.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
7 others found this helpful
Helpful
Great Meadows, NJ – Aug 08, 2017
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I recently had a breast biopsy done by Dr. Diehl after he was recommended to me by a few people I know and my OBGYN. Not only was he extremely knowledgeable about my situation, he was very kind and caring which is something you do not see most of the time. Very happy with my decision to use him and the final results.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
4 others found this helpful
Helpful
Morristown, NJ – Jan 12, 2017
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Dr. Diehl initially diagnosed my breast cancer after performing a biopsy and ordering the pathology. His insistence on the most precise testing absolutely contributed to my positive outcome following chemo and a bilateral mastectomy. He is intellectually rigorous and extraordinarily kind-hearted. He is available at any time to answer questions and explain treatment options. When I was most upset and afraid in the days following my diagnosis, he brought me peace through his caring manner.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
5 others found this helpful
Helpful
Chris C. in Basking Ridge, NJ – Nov 27, 2016
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He is a highly compassionate and skilled surgeon who immediately put me and husband at ease with his kind demeanor at the consult. We had met prior with 2 other "rockstar" area breast surgeons who shared a lack of urgency and left us feeling less than confident. Dr. Diehl looked at me as a person, not just body parts and urged me to proceed asap. My surgery revealed stage 2 DCIS, and we are so very glad we had his oncological background. He simply saved my life. Wonderful experience.
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
4 others found this helpful
Helpful
onehappylady in Randolph, NJ – Oct 07, 2016
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Dr. Diehl performed a double mastectomy on my wife in 2014 for cancer. We were beyond scared to say the least. Dr. Diehl's calm demeanor and professionalism made us feel confident that my wife would get through this bout with cancer. The surgery went as planned without issue. My wife has been cancer free since because of Dr. Diehl. One word of caution, the Breast Reconstruction Surgeon that works or worked at the time with Dr. Diehl, was not in our insurance network. MAKE SURE YOURS IS!
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
7 others found this helpful
Helpful
Thankful in Boonton, NJ – Aug 30, 2016
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About Me

care philosophy

I firmly believe that the most effective doctors are those that treat patients, not diseases. Clearly understanding the disease of the patient is essential, but even diseases vary from patient to patient so I always teach the Surgical Residents...read more

biography

Dr. Diehl is a board certified General Surgeon with special interest, training and expertise in Surgical Oncology and Breast Surgical Oncology. He trained at the prestigious Memorial Sloan-Kettering Cancer Center and is part of Summit Medical Group...read more
  • Breast Surgical Oncology

  • Surgical Oncology

  • General Surgery

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

  • Memorial Sloan Kettering Canc C

    Fellowship Hospital, 1988
  • Morristown Memorial Hospital

    Residency Hospital, 1986
  • Indiana University Medical Center

    Residency Hospital, 1982
  • Universidad Anahuac, Escuela De Medicina

    Medical School, 1981
For detailed information about any of the below board actions, please search for the provider's records on the linked state licensing board or the Federation of State Medical Boards. To learn more about the difference between these sources, please refer to our FAQs.
Healthgrades has not received any data indicating a board action exists for this provider.
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  • Spanish

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Locations

Practice

Summit Medical Group PA150 Park Ave Florham Park, NJ 07932
1
Daveed Frazier MD LLC261 James St Ste 2G Morristown, NJ 07960
2
Summit Medical Group PA75 E Northfield Rd Livingston, NJ 07039
3