Dr. Sibyl Rae Cornell Hewitt , PhD
Psychologist • Boulder, CO
Professional Overview & Biography Verified Profile Summary
Dr. Sibyl Hewitt, PhD is a certified Psychologist practicing in Boulder, CO. With approximately 3 years of clinical experience since completing medical education in 2023, Dr. Hewitt delivers high-quality medical care to the local community at 777 29TH ST STE 500.
Dr. Hewitt does not directly accept Medicare assignment.
Practice Location & Contact Primary Location
777 29th St Ste 500
Boulder, CO 803032357
Medicare Profile & Education
Other
2023
Not Specified
In-Person Only
Specialty Benchmarks & Practice Insights
Comparative analytics for Psychologist in Boulder, CO
Practicing in Boulder, CO (1035 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Clinical Seniority & Experience Comparison
Medical Specialties & State Licenses
CMS Verified: 2026-04-27NUCC Taxonomy Code: 103T00000X
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
NUCC Taxonomy Code: 103TC0700X
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Nurse Practitioner - Psychiatric/Mental Health
Psychiatric-Mental Health Nurse Practitioner
Counselor - Professional
Social Worker
LSW#
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Registered at 777 29TH ST STE 500, BOULDER, CO 803032357 (Tel: 7205518074)
Registered at 777 29TH ST STE 500, BOULDER, CO 803032357 (Tel: 9703472120)
Recorded as SIBYL HEWITT, PH.D
Psychologist (License #PSY.0006814 in CO)
NPI status registered as active in NPPES database
Registered at 1300 N 17TH AVE, GREELEY, CO 806319584 (Tel: 9703472120)
Registered at 1300 N 17TH AVE, GREELEY, CO 806319584 (Tel: 9703472120)
Recorded as SIBYL CORNELL
Counselor
First registered as active Individual Practitioner in NPPES Database.
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NPI Administrative Meta
Mailing Address
777 29th St Ste 500
Boulder, CO 803032357
Phone: 9703472120
This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.