
Highlights
Age Groups Seen
- Pediatrics
- Teenagers
- Adults
- Geriatrics
Languages
- English
Provider Gender
MaleAbout Marlon Guerrero and Banner Safety Practices
Care Philosophy
I use a Multidisciplinary Endocrine Team to provide every patient with quality and comprehensive care. I perform broad based surgical procedures to endocrine diseases, from minimally invasive surgeries (single incision laparoscopy, Robotic surgery, minimally invasive parathyroid and thyroid surgeries), to conventional open and complex operations. Our team uses comprehensive national guidelines and new innovation to provide cutting edge care for all of our patients.
Specializing In
Fellowship Trained Endocrine Surgeon specializing in:
1. Thyroid Cancer (Initial and Recurrent Disease)
2. Thyroid Nodules/Masses (Initial workup and long-term management)
3. Parathyroid Disease (Primary, Secondary, and Tertiary Hyperparathyroidism)
4. Parathyroid cancer
5. Adrenal tumors/masses (Functional or Non-functional)
6. Adrenal Carcinoma
Interests & Activities
I am the father of 2 wonderful boys and I am a devoted husband to my beautiful and intelligent wife. I am an outdoor enthusiasts and enjoy Triathlons, Marathons, Cycling, Swimming, Hiking, and basically any outdoor adventure.
Research and Publications
Hospital Affiliations
Banner - University Medical Center South
Banner - University Medical Center Tucson
Expertise
Education
- Fellowship: University of California San Francisco, 2009
- Residency: Baylor College of Medicine, General Surgery, 2008
- Internship: Baylor College of Medicine, General Surgery, 2004
- Medical School: Meharry Medical College School of Medicine, 2003
Board Certifications
- Surgery (General Surgery): American Board of Surgery, 2021
Video
Locations
- University of Arizona Cancer Center
- 3838 North Campbell Avenue, Building 1, Tucson, AZ 85719
- phone: 520-694-2873
- fax: 520-694-0255
Testimonials
4.9 out of 5.0
670 ratingsAll patient experience ratings and testimonials are submitted by actual patients and verified by a leading independent customer experience company. Patient identities are withheld to ensure confidentiality and privacy.
- 5 out of 5 starsReviewed on 12/12/2025
A very personable doctor!
- 5 out of 5 starsReviewed on 12/9/2025
He was friendly knowledgeable answered all my questions
- 5 out of 5 starsReviewed on 11/29/2025
Same as previous
- 5 out of 5 starsReviewed on 11/24/2025
Dr Guirrero treated me with respect and was knowledgeable and kind. He addressed all of the members of his team by name and treated them respectfully as well. He out me and my wife at ease.
- 5 out of 5 starsReviewed on 11/24/2025
Excellent doc!
- 5 out of 5 starsReviewed on 11/18/2025
He was very kind, thoughtful and caring. A cancer diagnosis is difficult, and he helped me feel positive.
- 5 out of 5 starsReviewed on 11/17/2025
Dr Guerrero was very personable and made me feel comfortable during my visit. He spent time with me and addressed my concerns in a truly caring fashion.
- 5 out of 5 starsReviewed on 11/14/2025
Dr. Guerrero is an amazing doctor, kind, smart, always friendly and explains everything about what you have going on, what to watch for, what the treatment will be if necessary. Just an all around great doctor.
- 5 out of 5 starsReviewed on 11/14/2025
He was great. Friendly, clear explanations, organized layout of risks and options. To the point but understandable.
- 5 out of 5 starsReviewed on 11/13/2025
Excellent presence, concerned and caring while being efficient.
- 5 out of 5 starsReviewed on 11/12/2025
Kept me informed.
- 5 out of 5 starsReviewed on 11/11/2025
He is very knowledgable and explains everything to you.
- 5 out of 5 starsReviewed on 11/10/2025
Absolutely wonderful physician who took time to explain anything and answer any questions!
- 5 out of 5 starsReviewed on 11/10/2025
They were very kind and explained everything well and didn't make me feel like a number
- 5 out of 5 starsReviewed on 11/10/2025
Very nice very helpful explain things well and reassuring
- 5 out of 5 starsReviewed on 11/10/2025
Very professional and adjusted to my individual needs.
- 5 out of 5 starsReviewed on 11/4/2025
Dr. Guerrero fully explains to his patients what is happening with their body in post-surgery and outlines a post-surgery plan for recovery, and fully answers questions the patient has.
- 5 out of 5 starsReviewed on 11/4/2025
Excellent in care and explaining what tests reveal. Very knowledgeable and takes care a step at a time.
- 5 out of 5 starsReviewed on 11/3/2025
He was just very friendly, patient, willing to explain the procedure and answer questions - all around nice guy. And again, treated his medical assistants with respect, which I really liked.
- 5 out of 5 starsReviewed on 10/24/2025
He is compassionate, attentive, and kind.
- 5 out of 5 starsReviewed on 10/20/2025
He is very caring and has an excellent reputation
- 5 out of 5 starsReviewed on 10/17/2025
Dr. Guerrero is an exceptional physician. He is very competent, caring, a good listener and takes time with his patients.
- 5 out of 5 starsReviewed on 10/17/2025
He was very personable and explained the medical procedure very well.
- 5 out of 5 starsReviewed on 10/11/2025
He is very experienced and knowledgeable.
- 5 out of 5 starsReviewed on 10/7/2025
His caring attitude brings peace of mind and comfort to me. He's profoundly aware of sharing in terms of understanding reality conditions that relate to my medical needs.
- 5 out of 5 starsReviewed on 10/6/2025
He has treated me the way I would liked to have been treated in every way. In addition, he is an excellent surgeon.
- 5 out of 5 starsReviewed on 10/4/2025
He is AWESOME. Kind and explained anything we had questions about
- 5 out of 5 starsReviewed on 10/3/2025
He was amazing. He explained everything quickly and concisely and even drew me a picture to illustrate. He put me at ease and made me feel so much better and I really trust him.
- 5 out of 5 starsReviewed on 10/3/2025
He was patient with me as well as caring.
- 5 out of 5 starsReviewed on 9/26/2025
Explained everything/very kind
- 5 out of 5 starsReviewed on 9/22/2025
Dr G. takes time to explain everything. Very articulate and compassionate man. Put me at ease.
- 5 out of 5 starsReviewed on 9/22/2025
Efficient and easy to discuss potential testing and scans.
- 5 out of 5 starsReviewed on 9/19/2025
Very knowledgeable, took great care to be sure I understood what happening at all times
- 5 out of 5 starsReviewed on 9/18/2025
He explained everything in a way that I could understand. He was very patient!
- 5 out of 5 starsReviewed on 9/18/2025
Dr Guerrero is an excellent doctor and treats his patience with care.
- 5 out of 5 starsReviewed on 9/15/2025
He is thorough kind and listens
- 5 out of 5 starsReviewed on 9/8/2025
He has great bedside manners and cares to explain to the patient
- 5 out of 5 starsReviewed on 9/8/2025
He is a gentleman and explain very good
- 5 out of 5 starsReviewed on 9/3/2025
Dr. Guerrero not only demonstrated superior subject matter knowledge, he took the time to explain my particular situation to me (including using my specific radiology images). He immediately followed through with treatment. The entire time, he was pleasant and considerate (skills that are always appreciated by patients).
- 5 out of 5 starsReviewed on 9/1/2025
Ever since my first appt with Dr. Guerrero I have felt comfortable and confident about my care.
- 5 out of 5 starsReviewed on 8/22/2025
He was very pleasant very thorough explained everything in detail even drew pictures gave me all my options
- 5 out of 5 starsReviewed on 8/15/2025
He is simply the best. He explains things thoroughly. He has a wonderful demeanor that is both serious about technical things but lighthearted in approaching his patients.
- 5 out of 5 starsReviewed on 8/14/2025
Excellent communication skills. I felt very comfortable.
- 5 out of 5 starsReviewed on 8/10/2025
He drew a diagram explaining how much diagnoses relates to my entire body
- 5 out of 5 starsReviewed on 8/8/2025
He is the best
- 5 out of 5 starsReviewed on 7/21/2025
He is personable. Very precise, but uses terms you can understand.
- 5 out of 5 starsReviewed on 7/14/2025
He was polite and informative. A pleasant man.
- 5 out of 5 starsReviewed on 7/7/2025
He has an outstanding reputation, wonderful pleasant personality, good experience
- 5 out of 5 starsReviewed on 7/7/2025
She signed us in last visit. Very helpful, friendly, professional.
- 5 out of 5 starsReviewed on 7/4/2025
Very easy to talk with and caring
- 5 out of 5 starsReviewed on 7/1/2025
Very informative, pleasant, and I'm sure, knowledgeable of my problem at hand.
- 5 out of 5 starsReviewed on 6/27/2025
Dr. Guerrero explained a plan for my problem in terms that I easily understood. He was kind and efficient and answered all my questions easily.
- 5 out of 5 starsReviewed on 6/14/2025
He truly cares about his patients and he will explain things to you so you can understand
- 5 out of 5 starsReviewed on 6/13/2025
He's the best one I have ever gone to.
- 5 out of 5 starsReviewed on 5/19/2025
He is knowledgeable, an outstandingly skilled surgeon. He explained everything in easy to understand terms. He took all the time I needed to cover all my questions. I felt cared for and heard. Everyone I encountered during my surgical journey spontaneously offered praise of him and his work.
- 5 out of 5 starsReviewed on 5/19/2025
It was my first surgery ever and I was made feel really comfortable and informed about the procedure.
- 5 out of 5 starsReviewed on 5/19/2025
He was very knowledgeable. He took the time to explain and he explained very effectively.
- 5 out of 5 starsReviewed on 5/17/2025
He was precise, he had a great sense of humor. Explained on layman terms.
- 5 out of 5 starsReviewed on 5/10/2025
Dr. Guerrero is a very skilled and knowledgeable physician whom I trust with my healthcare 100%. It is great to have a doctor that you can trust and not second guess. He is also very kind with a great sense of humor.
- 5 out of 5 starsReviewed on 5/9/2025
He really felt like a ray of sunshine. His confidence and positivity was just what I needed to feel like there is hope with my diagnosis.
- 5 out of 5 starsReviewed on 5/9/2025
Very good doctor and knows his stuff
- 5 out of 5 starsReviewed on 5/5/2025
He was very straight forward and easy to understand, listened to my questions and comments and made sure I understood the answers. He was very caring for me as a patient.
- 5 out of 5 starsReviewed on 4/25/2025
He took time to explain treatment options with me after going through my tests.
- 5 out of 5 starsReviewed on 4/21/2025
Dr. Guerrero is The Best surgeon in every respect. My pre op and post op meetings with him were so helpful and prepared me for the surgery and for what to expect following surgery. He is one of the kindest and most caring doctors I have ever known. When I had some swelling after surgery, I called to ask him about it. He texted me immediately and assured me that it was nothing serious, and that he wanted to put my mind at ease about it.
- 5 out of 5 starsReviewed on 4/21/2025
He carefully explained what he was going to do. He explained how long it would take to get the results and the various things I could do when I got the results
- 5 out of 5 starsReviewed on 4/21/2025
He carefully explained what he was going to do. He explained how long it would take to get the results and the various things I could do when I got the results
- 5 out of 5 starsReviewed on 4/18/2025
Dr. Guerrero is sure that you are the most important person in the room. The explanations and descriptions are thorough and understandable. What's more his positivity is contagious.
- 5 out of 5 starsReviewed on 4/18/2025
He made us feel comfortable and listened to our issues and give us every option
- 5 out of 5 starsReviewed on 4/17/2025
He's been my long time Doctor and friend and I trust him with my care. I don't know how he keeps track of every detail.
- 5 out of 5 starsReviewed on 4/17/2025
Listened to what I had to say. Was very personable
- 5 out of 5 starsReviewed on 4/17/2025
He was competent, kind and patient
- 5 out of 5 starsReviewed on 4/15/2025
Dr. Guerrero is one of the finest physicians I have ever known. He is supremely competent, expertly knowledgeable, and always has a warm and caring manner.
- 5 out of 5 starsReviewed on 4/12/2025
Very Good dr / surgeon and knowledgeable and caring dr.
- 5 out of 5 starsReviewed on 4/11/2025
Very professional and kind, took time to show me my CT scan in detail and gave me options and then left the decision up to me. I trust him to be there when I need him.
- 5 out of 5 starsReviewed on 4/8/2025
He is excellent in taking care of me, and interacting with me
- 5 out of 5 starsReviewed on 4/8/2025
Excellent Dr. Knowledgeable. Excellent patient care
- 5 out of 5 starsReviewed on 4/5/2025
He is a skilled caring surgeon. He takes time to explain procedures and listen to concerns. All of his staff do the same.
- 5 out of 5 starsReviewed on 4/5/2025
He is a skilled caring surgeon. He takes time to explain procedures and listen to concerns. All of his staff do the same.
- 5 out of 5 starsReviewed on 4/4/2025
Friendly has excellent communication skills, explained the procedure beforehand and answered all our questions. The care he provided us is of the highest quality
- 5 out of 5 starsReviewed on 3/20/2025
He's a great listener, extremely confident in his skills, honest and upbeat. I trust him .
- 5 out of 5 starsReviewed on 2/25/2025
His overall bedside manner is phenomenal
- 5 out of 5 starsReviewed on 2/24/2025
Excellent surgeon plus so positive and caring.
- 5 out of 5 starsReviewed on 2/21/2025
Very informative and respectful. He took his time to thoroughly explain my concerns
- 5 out of 5 starsReviewed on 2/20/2025
Dr Guerrero is very kind, has a great sense of humor, and communicates the findings, results of the tests and the surgery at a level that I could understand. I had great confidence in Dr. Guerrero going into surgery, and would recommend him to anyone, especially those with parathyroid issues.
- 5 out of 5 starsReviewed on 2/20/2025
Dr Guerrero is very kind, has a great sense of humor, and communicates the findings, results of the tests and the surgery at a level that I could understand. I had great confidence in Dr. Guerrero going into surgery, and would recommend him to anyone, especially those with parathyroid issues.
- 5 out of 5 starsReviewed on 2/17/2025
Helpful and informative
- 5 out of 5 starsReviewed on 2/15/2025
Personable and explained my medical situation in easy to understand terms.
- 5 out of 5 starsReviewed on 2/14/2025
Although I only met him for a brief time, Dr. Guerrero was very thorough in explaining his findings to me, for my thyroid ultrasound. He was very pleasant.
- 5 out of 5 starsReviewed on 2/10/2025
Great physician. Caring and attentive to my needs.
- 5 out of 5 starsReviewed on 2/3/2025
Very personable and showed a real interest in my problem by showing ne images of my thyroid and giving me next steps of what to do.
- 5 out of 5 starsReviewed on 2/1/2025
Love Dr Guerrero! He is very kind, never had to wait more than a few minutes. He listens, and explains things so I can understand.
- 5 out of 5 starsReviewed on 1/30/2025
He's a wonderful surgeon and amazing physician. He took time with me to explain things and make me feel comfortable with my results. That means a lot to patients, his bedside manner is probably one of the best I've seen. I used to work with physicians and he definitely is top notch .
- 5 out of 5 starsReviewed on 1/30/2025
He's a wonderful surgeon and amazing physician. He took time with me to explain things and make me feel comfortable with my results. That means alot to patients, his bedside manner is probably one of the best I've seen. I used to work with physicians and he definitely is top notch .
- 5 out of 5 starsReviewed on 1/27/2025
Very helpful and patient with our admin questions and admin requests
- 5 out of 5 starsReviewed on 1/18/2025
Good and clear information
- 5 out of 5 starsReviewed on 1/17/2025
A wonderful man and a great physician!
- 5 out of 5 starsReviewed on 1/16/2025
He was kind, thoughtful, patient and informative.
- 5 out of 5 starsReviewed on 1/15/2025
He is a very caring and competent doctor
- 5 out of 5 starsReviewed on 1/10/2025
A top class physician. Thorough exam. Clear analysis and a great human being.
Similar Providers
Banner - University Medicine North
3838 North Campbell Avenue, Tucson, AZ 85719
Banner - University Medicine North
3838 North Campbell Avenue, Tucson, AZ 85719

