Gregory W. Gerritsen, PHD
Clinical Psychologist · Boulder, CO
Gregory W. Gerritsen, PHD is a clinical psychologist with a practice address in Boulder, Colorado, and NPI 1083795686, issued on Oct 18, 2006. Check the license (Colorado 1209, as entered in NPPES) with the Colorado board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Gregory W. Gerritsen
- Credential
- PHD
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- 1209 CO
Self-reported in NPPES; status is on the state search - Practice location
- 2501 Walnut St, Boulder, CO 80302
- Phone
- (303) 473-4433
- Enumerated
- Oct 18, 2006
- Record last updated
- Oct 23, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (303) 499-2217
- Medicaid ID
- 07012099 CO
- Entity
- Type 1 · individual
Also registered at 2501 Walnut St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Arlene Hegg, M.D.Specialist1568417327
- John Kirk, PSY.D.Specialist1851330435
- Lauri Liverman, APN. (RN, MSN, PMHNPPsychiatric/Mental Health Nurse Practitioner1508911512
- Earle Shugerman, M.D.Psychiatry Physician1801943477
- Richard Suddath, M.D.Psychiatry Physician1194772996
- Suzanne Sundheim, MDChild & Adolescent Psychiatry Physician1609891779
Verify Gregory W. Gerritsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Colorado board licenses this profession
Search for license 1209Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
114 clinical psychologist records list a practice address in Boulder
They are 114 of the 5,635 NPPES records with a practice address in Boulder, and 1,652 clinical psychologist records in Colorado. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 114 in Boulder → All 1,652 in Colorado → Every provider in Boulder →
Other clinical psychologist records in Colorado
- Jeannine Abbott, PSYDEdwards, CO1225121767
- Monica Abdul-Chani, PHDDenver, CO1922988260
- Natalie Abramson, PHDAurora, CO1568559615
- Joyce Ackerman, ED.D.Greeley, CO1548255565
- Gail Adams, PSY.D.Centennial, CO1992916324
- Francis Addrisi, PHDMeeker, CO1932227584
- Stuart Adelman, PH.D.Denver, CO1548206378
- Amber Adkins, PH.D.Wadsworth, CO1356448831
- Christina Aegerter, PSYDDenver, CO1447685391
- Jenny Agbortogho, PSY.D.Littleton, CO1114860467
Common questions
What is Gregory W. Gerritsen, PHD's NPI number?
Gregory W. Gerritsen, PHD's National Provider Identifier (NPI) is 1083795686, issued on Oct 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory W. Gerritsen, PHD located?
The NPPES record lists a practice address at 2501 Walnut St, Boulder, CO, 80302. Phone: (303) 473-4433. Providers update this record themselves, so call before visiting.
How can I verify Gregory W. Gerritsen, PHD's license?
NPPES lists Colorado license number 1209, as entered by the provider. Search the Colorado board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.