Nancy Mary Horstmann, PHD
Clinical Psychologist · Boulder, CO
Nancy Mary Horstmann, PHD is a clinical psychologist with a practice address in Boulder, Colorado, and NPI 1184669343, issued on Jun 19, 2006. Check the license (Colorado 1514, 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
- Nancy Mary Horstmann
- Credential
- PHD
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- 1514 CO
Self-reported in NPPES; status is on the state search - Practice location
- 4141 Arapahoe Ave, Boulder, CO 80303
- Phone
- (303) 447-0811
- Enumerated
- Jun 19, 2006
- Record last updated
- Aug 7, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (303) 442-3170
- Medicaid ID
- C60766 OH
- Medicare enrollment
- Enrolled (PECOS I20060111000050); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 1977
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 1,652 in Colorado → Look up another NPI →
Also registered at 4141 Arapahoe Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stephanie Helsel, M.A., LPCMental Health Counselor1417013541
- Catherine Johnston, PH.D.Psychologist1851370886
- Dominique RiveraDentist1710730288
Verify Nancy Mary Horstmann in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Colorado board licenses this profession
Search for license 1514Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Nancy Mary Horstmann among 1,652 clinical psychologist records in Colorado
Nancy Mary Horstmann, PHD is one of 1,652 clinical psychologist records with a practice address in Colorado. 14% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 80% newer
- In a Medicare fileNo · 14% of these records are
- In the CMS Doctors and Clinicians fileYes · 22% of these records are
- Graduated1977 · median 2009 among the 370 with a school on file
- Record last updated2013 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
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 1,652 in Colorado → Every provider in Boulder → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Mary Gail Becker, PH. D.Boulder, CO 803031902014624
- Amanda Bye, PSYDBoulder, CO 803031730205378
- Bruce Casey, PH. D.Boulder, CO 803031275662991
- Karen Drucker, PSYDBoulder, CO 803031154478600
- Ricardo Esparza, PH.D.Boulder, CO 803031427153055
- Lynn Haley, PSYDBoulder, CO 803031336270941
- Elisha LucasBoulder, CO 803031760544035
- Eva Malanowski, PSY.D.Boulder, CO 803031164755021
Common questions
What is Nancy Mary Horstmann, PHD's NPI number?
Nancy Mary Horstmann, PHD's National Provider Identifier (NPI) is 1184669343, issued on Jun 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nancy Mary Horstmann, PHD located?
The NPPES record lists a practice address at 4141 Arapahoe Ave, Boulder, CO, 80303. Phone: (303) 447-0811. Providers update this record themselves, so call before visiting.
How can I verify Nancy Mary Horstmann, PHD's license?
NPPES lists Colorado license number 1514, 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.