Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1831738863 Individual Practitioner Female Practitioner

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

Practice Address

777 29th St Ste 500

Boulder, CO 803032357

Telephone 7205518074
Associated Practice Facility / Clinic
🏢 Heart Centered Counseling, Pc Facility NPI 1104405562

Medicare Profile & Education

Medical School

Other

Graduation Year

2023

Medicare Assignment

Not Specified

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Psychologist in Boulder, CO

Rising Specialist (<5 Yrs)
Practitioner Clinical Experience
3 Yrs -26.5 yrs vs City Avg
City Avg: 29.5 Yrs
State Avg: 22.9 Yrs
Regional Practice Density
84 Specialists

Practicing in Boulder, CO (1035 Statewide)

Telehealth Adoption Rate
11.9% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Hewitt (3 Years) 3 Yrs
Boulder Specialty Average (29.5 Years) 29.5 Yrs

Medical Specialties & State Licenses

CMS Verified: 2026-04-27
Psychologist Primary Specialty

NUCC Taxonomy Code: 103T00000X

State License CO PSY.0006814

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.

Psychologist - Clinical

NUCC Taxonomy Code: 103TC0700X

State License CO PSY.0006814

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

3 Associated Practitioners
Daniel Burhans , PMHNP

Nurse Practitioner - Psychiatric/Mental Health

NPI 1376921940

Psychiatric-Mental Health Nurse Practitioner

Kristin Etzel

Counselor - Professional

NPI 1598603888
NPI 1861214777

LSW#

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

10 Historical Events
📍
Updated Practice Location April 27, 2026

Registered at 777 29TH ST STE 500, BOULDER, CO 803032357 (Tel: 7205518074)

📍
Updated Business Mailing Address April 27, 2026

Registered at 777 29TH ST STE 500, BOULDER, CO 803032357 (Tel: 9703472120)

👤
Provider Name / Credentials Updated April 27, 2026

Recorded as SIBYL HEWITT, PH.D

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) April 27, 2026

Psychologist (License #PSY.0006814 in CO)

NPI Profile Active December 20, 2019

NPI status registered as active in NPPES database

📍
Updated Practice Location December 20, 2019

Registered at 1300 N 17TH AVE, GREELEY, CO 806319584 (Tel: 9703472120)

📍
Updated Business Mailing Address December 20, 2019

Registered at 1300 N 17TH AVE, GREELEY, CO 806319584 (Tel: 9703472120)

👤
Provider Name / Credentials Updated December 20, 2019

Recorded as SIBYL CORNELL

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) December 20, 2019

Counselor

🟢
Initial NPI Registration & Enumeration December 20, 2019

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1831738863
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: December 20, 2019
Last Update: April 27, 2026
Sole Proprietor: No

Mailing Address

777 29th St Ste 500

Boulder, CO 803032357

Phone: 9703472120

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

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.