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Dr. Philip Theodosopoulos is director of the Skull Base Tumor Program and vice chair of neurological surgery at UCSF. Before joining UCSF, he served as director of skull base surgery at the University of Cincinnati for 10 years.

Theodosopoulos cares primarily for patients with skull base lesions, particularly malignancies and acoustic neuromas – noncancerous tumors that grow on nerves near the ear. His expertise includes endoscopic treatment of pituitary adenomas and chordomas as well as minimally invasive approaches to the skull base.

Theodosopoulos has been a pioneer in the development of new surgical approaches to the skull base. He served as co-principal investigator for the largest prospective multicenter trial of surgical treatment for acoustic neuromas, and he currently serves on the Acoustic Neuroma Association's medical advisory board.

He also has extensive expertise in research on patient outcomes. As a resident at UCSF, he completed the full curriculum for outcomes research and clinical epidemiology, and he continues to be involved in outcomes research at both the local and national levels.

Theodosopoulos earned his undergraduate degree at the Massachusetts Institute of Technology and completed medical school at Stanford University. He completed his neurosurgical training at UCSF, followed by a fellowship in cerebrovascular and skull base surgery at the Brigham and Women's Hospital, an affiliate of Harvard Medical School.

Theodosopoulos has been on the faculty for more than 50 national and international surgical courses. He serves on the education committee for the Congress of Neurological Surgeons. He serves as residency program director for neurological surgery at UCSF.

  • Board Certifications

    American Board of Neurological Surgery, Neurological Surgery, 2006

  • Fellowships

    Brigham and Women's Hospital, 2003

  • Residencies

    UCSF, Neurosurgery, 2002

  • Internship

    UCSF, General Surgery, 1997

  • Degree

    Stanford University School of Medicine, 1996

  • Languages

    English

Where I see patients (4)

    My reviews

    4.8

    Overall Experience
    285 Ratings
    About our process
    Jun 26, 2025
    My caregiver has a very empathetic, calm and friendly manner. I really appreciate this.
    Jun 12, 2025
    I received excellent care from Dr. Theodosopoulos and his staff
    Jun 06, 2025
    Dr. Theo was awesome in answering all my questions regardless of how directly related to my condition. He was very patient and made me feel at ease about my surgery.
    Jun 02, 2025
    Dr. Theo was very personable, answered all my questions, and made me feel at ease throughout my telehealth visit
    May 28, 2025
    Doctor was amazing. Not only did he address the condition that was the topic of my appointment, he asked questions about other matters in my medical records and gave me a second opinion about that condition which was very valuable to me as it validated the course of treatment I was leaning toward. I left the appointment feeling very relieved and comfortable with the information I received.
    May 15, 2025
    Very good? Excellent+++ is more like it!
    May 12, 2025
    UCSF is, from our limited experience, way ahead in terms of patient management than other bay area providers
    May 02, 2025
    It was just that the conversation was so fast that I wasn't able to ask "what's next?"
    Apr 29, 2025
    Dr.Theodosopoulos is awonderful Surgeon, He was very kind to the patients, answered my detailed questions and cleared up my doubts,I am grateful for the telehealth visits as I live 6-7 hours away.
    Apr 09, 2025
    Dr. Theo and his team continue to deliver care at the highest level. I could not be more pleased.
    Apr 02, 2025
    I felt Dr. Theodosopoulos really cares about my situation and I am in good hands with him
    Feb 05, 2025
    Dr. Theo is great.
    Feb 02, 2025
    Dr Theodosopoulos gave me info on what needs to be done. He couldn't give me any specifics yet, though. Have to wait for another doctor to contact me.
    Jan 21, 2025
    I didn't hear anything about the risks of the proposed treatment. He explained that I would need to make appointments with other doctors, but not how this was to be scheduled.
    Jan 18, 2025
    Dr Theo is the best!!!!
    Dec 16, 2024
    Dr. Theo and his team at UCSF continue to provide me with the best medical care I've ever experienced.
    Nov 18, 2024
    Dr. Theodosopoulos Is a wonderful surgeon and he provides wonderful care. I am grateful for the telehealth visits as I live 3-4 hours away.
    Nov 09, 2024
    Excellent experience
    Nov 02, 2024
    The doctor rushed through everything. Didn't even give me a chance to finish explaining my symptoms. I felt he was rushing, trying to get through the appointment and be done with it.
    Oct 31, 2024
    I had a miraculous recovery and no complaints at all. I was lucky to have Dr. Theo do my surgery. He is wonderful.
    Oct 28, 2024
    Doctor was quick to end the call and cut my off before I could say goodbye.
    Oct 16, 2024
    Regarding the care and treatment for my condition he said he will discuss with other Doctors, look at the genetics of my tumors and then another Doctor and himself will be contacting me.
    Oct 16, 2024
    Just keep doing what you do.My surgery was relatively serious (at least to me) and I experienced nothing but support and care from all involved
    Oct 05, 2024
    Very professional and concerned for the needs of the patient.
    Sep 21, 2024
    We couldn't have been happier. We would like to find out more about moving our care to UCSF. We need help with that.
    Sep 11, 2024
    He is one of my favorite physicians!
    Sep 06, 2024
    Great person and Dr!!!
    Sep 04, 2024
    My appointment was to discuss the MRI results of my continuing 2-year follow-up monitoring from my 2012 surgery. Dr. Theodosopoulos stated that my MRIs were stable, and requested that I perform another MRI in 3 years.
    Aug 17, 2024
    Dr.Theodosopoulus answered all my questions and put my mind at ease.
    Jul 10, 2024
    Dr Theodosolus is very knowledgeable, kind, and show's interest in my care.
    Jul 05, 2024
    Dr. Theodosopoulos was informative, professional, and friendly, discussing the pros and cons of a tricky medical situation. I appreciated that he had carefully reviewed my MRIs and medical information before the call and had those details at his fingertips.
    Jun 06, 2024
    I reorted a symptom that I was still having (an continued increase in saliva production on the left and adverse taste of food at 13 months post op) and Dr Theo did not day anything about it (not uncommon, should resolve, might be the new norm') but did ask about my balance, which was not a complaint or concern.
    May 18, 2024
    Dr. Theo and Tracy are so kind, caring, great at explaining the plan of care, and such great advocates.
    May 17, 2024
    Dr Theo is the best
    May 09, 2024
    Feel very blessed! Got great care for my son!
    May 08, 2024
    My experience was good, with positive feedback re my situation. However, I do have more questions to ask for next time.
    Apr 18, 2024
    Extremely caring, informative, clear explanations, and supportive. Couldn't recommend Dr. Theo more highly.
    Apr 17, 2024
    Great doctor!
    Mar 27, 2024
    Visit with my doctor was very satisfactory
    Mar 22, 2024
    I would give a 6 (Excellent) or even a 10 (Outstanding)
    Mar 06, 2024
    Would have liked a little more time for my questions.
    Dec 30, 2023
    Answers to all my questions and concerns
    Dec 19, 2023
    Very much liked the doctor. Pleasant person with a sense of humor.
    Oct 25, 2023
    Good
    Oct 07, 2023
    He seemed a bit rushed this visit- but I get it.
    Sep 21, 2023
    Was very thoughtful
    Aug 26, 2023
    Could not be happier with this doctor. He is so nice and such a good listener.
    Aug 17, 2023
    I think I am in awe of how well i am treated at UCSF. Wow!

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