1. Home
  2. Directory
  3. Colorado
  4. Boulder
  5. Psychologist
  6. NPI Profile

GREGORY W GERRITSEN PHD
NPI 1083795686
Psychologist - Clinical in Boulder, CO

Active since October 18, 2006PECOS Enrolled
2501 WALNUT ST, SUITE 202, BOULDER, CO 80302(303) 473-4433(303) 499-2217 Get Directions Write a Review

NPPES record last updated: October 23, 2007. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Gregory W Gerritsen Phd NPPES

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

GREGORY W GERRITSEN PHD (NPI 1083795686) is an individual clinical provider in Boulder, Colorado, licensed in Colorado (1209) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1083795686
Entity TypeIndividualMale
Primary Taxonomy103TC0700X
Provider Legal NameGREGORY W GERRITSENCredential: PHD
Location Address2501 WALNUT ST, SUITE 202Boulder, CO 80302-5751
Mailing Address1062 Love CtBoulder, CO 80303-2975 · (303) 473-4433 · Fax (303) 499-2217
Phone(303) 473-4433
Fax(303) 499-2217
Sole ProprietorYes
Enumeration DateOctober 18, 2006
Last NPPES UpdateOctober 23, 2007
✔ NPI 1083795686 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code103TC0700X
License✔ Licensed in CO · 1209
Definition
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.
2501 WALNUT ST, Boulder, CO 80302
Open in Google Maps ↗

Other Identifiers 2

Medicare PINC82166CO
Medicaid07012099CO

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gregory W Gerritsen Phd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Psychotherapy, 1 hour 90837
Psychotherapy is a therapeutic interaction or treatment between a trained professional and a patient. In a 1-hour session, you'll talk about your feelings, thoughts, and behaviors to help identify and manage mental health issues. This process aids in personal growth, healing, and improved well-being.
107 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80302 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$174.82 typical visit price
range $58.06 – $174.82
Typical copayment $43.70 (range $14.51 – $43.70)
Most-billed visit code 99205
Established Patient
$102.03 typical visit price
range $18.88 – $142.79
Typical copayment $25.50 (range $4.72 – $35.69)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 14

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

JAMA ELLEN BRISCOE, PH.D., PLLC
Clinic/Center (Mental Health (Including Community Mental Health Center))
2501 WALNUT ST, SUITE 210
BOULDER, CO 80302
Boulder County (303) 499-3808
KRISTIN BROUSSEAU, DO, PC
Psychiatry & Neurology (Psychiatry)
2501 WALNUT ST, SUITE 108
BOULDER, CO 80302
Boulder County (720) 223-7877
DR. RICHARD SUDDATH M.D.
Psychiatry & Neurology (Psychiatry)
2501 WALNUT ST, SUITE 204
BOULDER, CO 80302
Boulder County (303) 444-7228
DR. MELANIE KEIRY YOUNG PSY.D.
Psychologist (Clinical)
2501 WALNUT ST, SUITE 208
BOULDER, CO 80302
Boulder County (303) 444-5330
MELANIE K YOUNG, PSYD, INC
Psychologist (Clinical)
2501 WALNUT ST, SUITE 208
BOULDER, CO 80302
Boulder County (303) 444-5330
SUZANNE SUNDHEIM MD PROFESSIONAL LLC
Psychiatry & Neurology (Psychiatry)
2501 WALNUT ST, SUITE 106
BOULDER, CO 80302
Boulder County (303) 786-7430
MS. LAURI E LIVERMAN APN. (RN, MSN, PMHNP
Nurse Practitioner (Psychiatric/Mental Health)
2501 WALNUT ST
BOULDER, CO 80302
Boulder County (303) 481-2366
ARLENE HEGG M.D.
Specialist
2501 WALNUT ST, SUITE #203
BOULDER, CO 80302
Boulder County (303) 442-4340

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 Gregory Gerritsen's NPI number?

The NPI number for Gregory Gerritsen is 1083795686. It was assigned to this individual provider in the NPPES registry on October 18, 2006.

Where is Gregory Gerritsen located?

Gregory Gerritsen practices at 2501 Walnut St Suite 202, Boulder, CO 80302. The listed phone number is (303) 473-4433.

What is Gregory Gerritsen's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Is Gregory Gerritsen enrolled in Medicare?

Yes. Gregory Gerritsen is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Gregory Gerritsen was last updated on October 23, 2007. NPI Profile syncs with the weekly NPPES data releases published by CMS.