SIBYL RAE CORNELL HEWITT PH.D
NPI 1831738863
Psychologist in Boulder, CO

Active since December 20, 2019PECOS Enrolled
777 29TH ST STE 500, BOULDER, CO 80303(720) 551-8074 Get Directions Write a Review

NPPES record last updated: April 27, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Apr 27, 2026, Apr 23, 2026, Dec 20, 2019 (3 updates tracked since 2019).

About Sibyl Rae Cornell Hewitt Ph.d NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SIBYL RAE CORNELL HEWITT PH.D (NPI 1831738863) is an individual psychologist in Boulder, Colorado, licensed in Colorado (PSY.0006814) and active in the NPI registry since December 2019. She is enrolled in Medicare PECOS and is a graduate of Other (2023).

NPPES Registry Identity

NPI1831738863
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameSIBYL RAE CORNELL HEWITTCredential: PH.D
Location Address777 29TH ST STE 500Boulder, CO 80303-2357
Mailing Address777 29th St Ste 500Boulder, CO 80303-2357 · (970) 347-2120
Sole ProprietorNo
Medical School CMSOtherGraduated 2023
Enumeration DateDecember 20, 2019
Last NPPES UpdateApril 27, 20263 updates tracked since enumeration
NPPES CertifiedApril 27, 2026
NPI 1831738863 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License Licensed in CO · PSY.0006814
Definition
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.
Also ListedPsychologist · ClinicalTaxonomy 103TC0700X · License PSY.0006814 (CO)
777 29TH ST STE 500, Boulder, CO 80303

Other Names 1

Former Name (1)Sibyl Rae Cornell

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare (PECOS)

Sibyl Rae Cornell Hewitt Ph.d is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID6406324821
PECOS Enrollment IDI20260505000783
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Other Providers at the Same Location NPPES 16

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Counselor (Mental Health)
777 29TH ST STE 500
BOULDER, CO 80303
Social Worker (Clinical)
777 29TH ST STE 500
BOULDER, CO 80303
Counselor (Professional)
777 29TH ST STE 500
BOULDER, CO 80303
Psychiatry & Neurology (Psychiatry)
777 29TH ST STE 500
BOULDER, CO 80303
Nurse Practitioner (Psychiatric/Mental Health)
777 29TH ST STE 500
BOULDER, CO 80303
Counselor (Mental Health)
777 29TH ST STE 500
BOULDER, CO 80303
Psychiatry & Neurology (Psychiatry)
777 29TH ST STE 500
BOULDER, CO 80303
Counselor (Professional)
777 29TH ST STE 500
BOULDER, CO 80303

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Sibyl Hewitt's NPI number?

The NPI number for Sibyl Hewitt is 1831738863. It was assigned to this individual provider in the NPPES registry on December 20, 2019. The provider is also known as Sibyl Rae Cornell.

Where is Sibyl Hewitt located?

Sibyl Hewitt practices at 777 29th St Ste 500, Boulder, CO 80303. The listed phone number is (720) 551-8074.

What is Sibyl Hewitt's specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

Is Sibyl Hewitt enrolled in Medicare?

Yes. Sibyl Hewitt is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Sibyl Hewitt was last updated on April 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.