"Dr. Phan, Ph.D., MSCP, is Colorado's 10th prescribing psychologist. A true pioneer in prescribing psychology. A practicing psychologist and professor, she receives my highest endorsement for forensic independent evaluations or expert clinical consultation."

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Dr. Justin D'Arienzo, Psy.D., MS, ABPP

Owner, D'Arienzo Psychology

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"Dr. Phan is a brilliant prescribing psychologist dedicated to holistic, evidence-based care. She combines rigorous clinical judgment with genuine compassion, and has a rare gift for translating her vast knowledge into real benefit for her patients."

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Dr. Jess Pearson-Allen, PhD, BCBA

Owner, Alpha Neuro

"Dr. Phan is an incredibly dedicated, intelligent and understanding Psychologist. She is highly skilled and experienced in psychological evaluation work. She is also highly skilled in psychopharmacology and support for medication needs."

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Dr. Cassie Comeau, Ph.D., MSCP

Owner, Comeau Psychological and Wellness Services

"Dr. Diem Phan is a gifted  evaluator, prescriber and all around psychologist. She is the type of organized, detailed and proactive clinician that is typically five steps ahead of everyone, but has the relational skills and humility such that you likely only realize this later on. Dr. Phan is an insightful and trustworthy source of clinical wisdom, including willingness and acumen in working with more difficult to treat situations like Bipolar Disorder and Treatment-Resistant Depression. In sum, Dr. Phan is a clinician you can trust to be the utmost professional."

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Dr. Ryan Jaarsma, Psy.D., MSCP

Director, Behavioral Health Education

Resident Faculty

Southern Colorado Family Medicine