Dr. Denae Rickenbacker (CedarParkPsych) is consolidating her practice with Cedar Park TMS beginning December 3, 2025. Learn more—>

Beacon Behavioral Partners: Cedar Park
Meet our Providers

Dr. Brian S. Earthman, MD

Brian S. Earthman, MD, is a psychiatrist and addiction medicine specialist focusing on adult mental health and substance abuse treatment. Dedicated to ensuring patients experience whole health after treatment, Dr. Earthman’s goal is to guide patients to wellness using a comprehensive treatment approach that includes TMS, medication, counseling, and Alpha-Stim™ therapy. He has been certified and trained by the Clinical TMS Society (CTMSS) since 2018.rnrnDr. Earthman graduated from the University of Texas at Austin, receiving a bachelor’s degree in biology. He then attended Texas Tech School of Medicine, where he received his medical degree. Dr. Earthman completed his residency in the department of psychiatry at the University of Texas Health Science Center in San Antonio in 2005. He is also a diplomat of the American Board of Addiction Medicine.

 

Beacon Behavioral Partners: Cedar Park

Rae Robertson, PMHNP

Ms. Robertson joins us from one of our Beacon Behavioral Partner clinics in Amarillo, TX where she’s been treating patients with Spravato for the past 3 years. Ms. Robertson brings us over 30 years of nursing experience, 11 years as a psychiatric nurse, and 5 years as a Board Certified Mental Health Nurse Practitioner.rnrnShe has three kids, two daughters and one son. Loves kayaking, hiking, concerts, traveling, and reading. She was born and raised in the panhandle, but now excited to be in Austin finally.

 

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Mandy Do, MSN, APRN, PMHNP BC, FNP C

Mandy Do, MSN, APRN, PMHNP BC, FNP C, is a dual certified psychiatric and family nurse practitioner dedicated to providing compassionate, patient centered mental health care for adults. She completed her Master of Science in Nursing at the University of Texas at Austin and later earned her Post Master’s Certificate in Psychiatric Mental Health from Wilkes University.
With nearly 20 years of experience in psychiatry, Mandy specializes in evaluating, diagnosing, and treating adults in long term care and community settings. She focuses on creating personalized, evidence based treatment plans that blend thoughtful medication management, supportive therapy, and practical education. Her approach is warm and collaborative, ensuring patients feel truly heard and supported. Mandy also provides telehealth psychiatric care for adults with intellectual and developmental disabilities living in group homes, helping improve access to mental health services for individuals who may face barriers to traditional care. Before becoming a nurse practitioner, Mandy worked extensively in acute care nursing—including medical surgical, cardiac, oncology, orthopedic, and trauma areas—giving her a strong clinical foundation and a whole person approach to care. Above all, Mandy’s goal is to create a safe, respectful environment where patients feel empowered to take meaningful steps toward emotional wellness.

Beacon Behavioral Health Partners: At Beacon Behavioral Health, we Partner with top-tier mental health practices to support their growth and success. We prioritize preserving your clinical independence and brand while streamlining administrative tasks, allowing you to focus on delivering exceptional care to your patients.

Dr. Brian S. Earthman, MD image
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Cedar Park TMS
Brian S. Earthman, MD, is a psychiatrist and addiction medicine specialist focusing on adult mental health and substance abuse treatment. Dedicated to ensuring patients experience whole health after treatment, Dr. Earthman’s goal is to guide patients to wellness using a comprehensive treatment approach that includes TMS, medication, counseling, and Alpha-Stim™ therapy. He has been certified and trained by the Clinical TMS Society (CTMSS) since 2018. Dr. Earthman graduated from the University of Texas at Austin, receiving a bachelor’s degree in biology. He then attended Texas Tech School of Medicine, where he received his medical degree. Dr. Earthman completed his residency in the department of psychiatry at the University of Texas Health Science Center in San Antonio in 2005. He is also a diplomat of the American Board of Addiction Medicine.
Cedar Park TMS


11901 W Parmer Ln
#310 B

Cedar Park TX 78613