John Maclou Longo, MD

Photo of John Longo
Radiation Oncology
Assistant 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 - 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.

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.
Dr Longo is one of the most caring and compassionate providers that I have seen. Not only does he explain treatment options and side effects, he cares about me as a person not just as a "disease." I'm so glad Dr. Longo is my doctor.
In retrospect I felt moderately at risk managing radiation side effects while living alone.
Dr. Longo knew my case history when we met. His detailed review, explanation of evaluation and treatment options were exceptional. He responded to some follow-up information I had sent him on myChart within a couple of hours with a phone call. I have great confidence in the care I will receive.
Dr. Longo was awesome. He explained everything in layman's terms and was so caring. I was put at ease the minute he walked through the door.
I scheduled this appointment as a second opinion for prostate cancer. Dr Longo so impressed myself as well as my wife that we have opted to have him manage my cancer treatment. I really don't think anymore needs to be said.
Dr Longo and his staff are top knotch and truly care for you! I recommend anyone who asks or is looking for care!
Dr. Longo is the most thorough and conscientious doctor that I have ever met. He took an incredible amount of time explaining my options to me.
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