Catherine Brennan


Davis, CA


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About Catherine Brennan, MD

Dr. Catherine Brennan is board-certified and treats children, adolescents, and adults with autistic spectrum and neurodevelopmental disorders. She completed her adult psychiatry residency at California Pacific Medical Center and her child psychiatry fellowship at UC Davis MIND Institute. Dr. Brennan trained residents and medical students at UC Davis and the Sacramento County Mental Health Treatment Center to work with patients who were chronically and severely mentally ill. She volunteers as clinical faculty at UC Davis and co-leads a processing group for psychiatric residents. Dr. Brennan has three grown children and enjoys traveling and yoga.

Education & Certifications

Doctor of Medicine (M.D.) University of Southern California

Conditions Treated

  • ADHD (Attention-deficit/hyperactivity disorder)
  • Anxiety
  • Autism spectrum disorder
  • Bipolar disorders
  • Co-occurring conditions
  • Conduct/Disruptive disorders
  • Depression
  • Major depressive disorder
  • Mood disorders
  • Obsessive-compulsive disorder (OCD)
  • Panic attacks/Disorders
  • Psychiatry consultation
  • Psychotic disorders
  • Sleep problems
  • Stress/Stress management
  • Trauma/PTSD (Post-traumatic stress disorder)

Insurance Accepted

  • Aetna CA
  • Anthem Blue Cross Commercial CA
  • Cigna Commercial CA
  • HMC Commercial  CA
  • Humana Commercial CA
  • Magellan Commercial CA
  • Optum/UBH CA
  • Health Net CA
  • insurance-6093

Don’t see your plan? Call us at 855-501-1004 to see if you are covered.

Insurance plans may vary by location and are subject to change.