Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Nancy Mary Horstmann, PHD

Individual provider Clinical Psychologist · NPI 1184669343

Dr. Nancy Mary Horstmann, PHD is a Clinical Psychologist in Boulder, Colorado. Graduated from University of Maryland School of Medicine in 1977, 49 years ago. Practices as a sole proprietor, accepts Medicare assignment and offers telehealth. Licensed in Colorado.

Years since qualifying
49
Trained at
University of Maryland School of Medicine
Licensed in
CO
In the registry since
2006
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

4141 Arapahoe Ave #205
Boulder, CO 80303-1032
Phone: (303) 447-0811
Fax: (303) 442-3170
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence 1514 (CO)

Record details

NPI number1184669343
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorYes
NPI enumeratedJune 19, 2006
Last updated in NPPESAugust 7, 2013

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolUNIVERSITY OF MARYLAND SCHOOL OF MEDICINE
Graduated 1977 (49 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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