Thomas D. Brennan, MD - Physician and Surgeon, Obstetrics and Gynecology, Portland, OR

Physician and Surgeon

Obstetrics and Gynecology

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Provider Bio

Dr. Thomas Brennan is a board-eligible OB/GYN physician and surgeon at Women's Healthcare Associates in Portland, Oregon.

From the Provider

"I hope that every patient leaves a visit with me feeling heard, valued and appreciated and that we are a team working together. I am honored and humbled to be able to care for women during some of the most challenging and important stages of their lives and I take the trust they place in me very seriously."

About the Provider

A fascination with anatomy and physiology, combined with a passion for learning and a desire to be challenged led Dr. Brennan toward a career in medicine. He chose OB/GYN because of the opportunity it offered to develop lasting bonds with patients during some of the most important times of their lives, while still pursuing his passion for surgery. In addition to caring for women during pregnancy and childbirth, he also helps them address a variety of gynecologic issues, including abnormal uterine bleeding, heavy vaginal bleeding and pelvic pain.

Dr. Brennan grew up in Salt Lake City, Utah but has been in Portland since moving here for college in 2004. He is married with three children. In addition to spending time with family, he enjoys watching sports and writing poetry.


  • Residency:

    Obstetrics and Gynecology, Oregon Health & Science University, 2019

  • Medical School:

    Doctor of Medicine, Oregon Health & Science University, 2015

  • Undergraduate Degree:

    Biology, University of Portland, 2008


  • American College of Obstetricians and Gynecologists

  • American Medical Association

Patient Survey Responses

  • Provider Ratings (36)
  • Patient Comments (17)

Taking time to answer your questions?

4.8 out of 5

Willingness to listen carefully to you?

4.8 out of 5

The thoroughness of the visit?

3.9 out of 5

Instructions regarding medication/follow-up care?

4.2 out of 5

Explaining things in a way you could understand?

4.5 out of 5

Amount of time spent with you?

4.1 out of 5

Including you in decision-making about your treatment plan?

4.5 out of 5

Knowledge of healthcare received from other providers?

3.7 out of 5

Knowledge of important information about your medical history?

4.1 out of 5

Advice given to you on ways to stay healthy?

4.1 out of 5
  • 05/07/2024

    Dr. Brennan was so compassionate and helpful. He answered all my questions clearly, and I never felt rushed. He isn't my primary WHA provider, I saw him for an urgent appointment. I really appreciated how he managed my full episode of care so that I had continuity throughout a very stressful time.

  • 05/03/2024

    Dr Brennan and Amanda were great as always! I appreciate that he wanted to do a little research before prescribing a medication. He is well aware of my history and I am grateful for how intentional he is with his care. My chart notes were signed the next day and my prescription was sent in! Thank you for your phenomenal care!

  • 04/26/2024

    He is one of the most empathetic doctors I have ever seen. My nurse was also amazing and is wonderful at her job.

  • 03/01/2024

    Dr Brennan was great.

  • 02/26/2024

    This is only the second time here and each time it feels so wonderful. It’s like a family feeling and I love it.

  • 12/15/2023

    Great service. Great team.

  • 12/09/2023

    Dr. Brennan is so kind and understanding, a GREAT doctor! We are so blessed to have him as our physician!

  • 09/15/2023

    really great - knowledgeable, kind, and respectful

  • 09/01/2023

    Dr. Brennan is an excellent doctor. He is very easy to talk to, and always addresses my concerns. Thanks for the great care!

  • 07/28/2023

    Medical staff was amazing and doctor was so nice and everyone was great as always here!

  • 07/14/2023

    Always great seeing Dr. Brennan. He is always up to date on my care and willing to work with me. I am always given space to ask any questions and am never judged.

  • 02/03/2023

    It felt very rushed, I probably listened to the baby’s heartbeat for less than a minute, and I feel like I wasn’t satisfied with the response with my question of “how do I know my baby will be ok from now until the ultrasound”

  • 01/27/2023

    Dr. Brennan is great!

  • 01/09/2023

    Dr. Brennan is very knowledgeable and easy to talk to. Thanks for the great care!

  • 01/09/2023

    Dr. Brennan is the best provider I’ve had. He is incredibly willing to listen and work with me. I am fully confident in the care I am receiving

  • 11/27/2022

    Dr. Brennan is an excellent physician, very kind and considerate, wonderful doctor! Medical asst. was excellent, kind, considerate as well as scheduler.

  • 08/23/2022

    All doctors I have had at WHA have been excellent as well as kind and Dr. Brennan was no exception.

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This will allow our teams to check whether your plan may require a referral for the care you need or to prepare benefits information to share with you at your visit. If you do not enter insurance information when scheduling, you may be asked to pay a $200-$500 deposit before receiving service.