John Maclou Longo, MD

Photo of John Longo
Radiation Oncology
Associate Professor
Accepting New Patients

Call for an appointment

Cancer Center - Froedtert Hospital 414-805-0505
Call for an appointment
Accepting New Patients
Call for an appointment
Cancer Center - Froedtert Hospital 414-805-0505


Treatment & Services

Virtual Visit

Diseases & Conditions

Anal Cancer
Biliary Cancer
Brain Cancer
Central Nervous System Tumors
General Radiation Oncology
Genitourinary Cancers
Gynecologic Cancers
Prostate Cancer
Stomach Cancer
Thoracic Cancers

Ages Seen


Languages Spoken



8800 West Doyne Ave.
Milwaukee, WI 53226
Cancer Center - Froedtert Hospital

Education & Training

University of Nebraska College of Medicine - Omaha - Doctor of Medicine - (2011)

Medical College of Wisconsin - Milwaukee - WI - Residency in Radiation Oncology - (2012-2016)

Board Certifications

Radiation Oncology

Patient Reviews

The comments are submitted by patients (or their caregivers) and reflect their views and opinions. The comments are not endorsed by and do not necessarily reflect the views of the Froedtert & the Medical College of Wisconsin health network. Learn more about our survey.*


* Due to high volume, only the most recent 30 comments are displayed for a selected value.

There should have been an answer "Excellent" as the receptionist, nurse help and the Doctor (Longo) were all excellent.
I feel very confident with Dr. Longo and his staff. I had an excellent appointment with no signs of cancer. I am very grateful for every appointment as I get closer to approaching the 5 year mark cancer free. Dr. Longo is very knowledgeable and observant to any signs of recurring cancer,
All the personal at the cancer center are very friendly and outgoing. Under the circumstances, it's a pleasure to go there.
Dr Longo took a lot of time with me and was very compassionate
Dr. Longo is great! Very caring and considerate! Best Doctor ever.
Have been very pleased with my care at the cancer clinic
I'm always impressed with the care and knowledge of my cancer treatment/history that Dr Longo shows at each appointment.
The Dr.was very truthful with me.He keep it Real.THANKS DOC
The whole "Froedtert Experience" was positive. From parking directions to ease of office access on such a large campus. The staff are welcoming and explained everything as we progressed through the visit.
Dr. Longo is amazing. His explanation as to where I am in the overall process of my illness was clear as was his explanantion of my treatment options goinf forward and the plus and minuses of each option. His explanation of the process for care going forward was also abundantly clear. This gave me a high level of confidence and trust In the process and helped put me at ease.
Dr longo spent an hour and a half with me explaining everything about my care and surveillance
His knowledge of my case history was outstanding. I was treated with respect and kindness. Overall great experience, given the circumstances.
Dr. Longo is very compassionate and really supports me as a person not just his patient. He listens to my concerns and always answers my questions thoroughly.
I really appreciate the kindness of Dr. Longo and his staff!!!
Dr Longo was well prepared about my situation and did a great job explaining his suggestions and reasoning.
It was a good 3 month re-check appointment.
The results of my recent Radiation Treatment have been very good so far, so it is very easy to be grateful and appreciative of the excellent treatment that I have received from Dr. Longo and his splendid staff. .
He asked alot of questions that I didn't think about as he learned more about me, hopefully seeing me as more then a number.
Dr. Longo is very caring person who I am glad to be his patient.
All the people I interacted with were very friendly and knowledgeable. Under the circumstances it was a pleasure going to the clinic, no problem at all.
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