Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Theresa L O'Brien, PA

Individual provider Physician Assistant · NPI 1740704980

Theresa L O'Brien, PA is a Physician Assistant in Lakewood, Colorado. Qualified in 2017, 9 years ago. Practices with Catholic Health Initiatives Colorado, a 1,266-clinician group, works from 3 locations, accepts Medicare assignment and offers telehealth. Licensed in Colorado and Wisconsin.

Years since qualifying
9
Licensed in
CO, WI
In the registry since
2017
Specialties on file
3
What do these letters mean?
PA — Physician Assistant
A licensed clinician who examines, diagnoses and treats under a physician's supervision.

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Practice location Address checks out

11750 W 2nd Pl Ste 255
Lakewood, CO 80228-1726
Phone: (303) 643-4117
Fax: (720) 321-8041
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 7780 S Broadway Ste 350, Littleton, CO 80122-2641 — (720) 638-7500
  • 2900 W Oklahoma Ave, Milwaukee, WI 53215-4330 — (608) 347-1972

Specialties & licences

Surgical Physician Assistant (primary) Taxonomy 363AS0400X · Licence PA.0005941 (CO)
Physician Assistant Taxonomy 363A00000X · Licence PA.0005941 (CO)
Physician Assistant Taxonomy 363A00000X · Licence 409923 (WI)

Record details

NPI number1740704980
Entity typeIndividual (Type 1)
GenderFemale
Credentials PA
Sole proprietorNo
NPI enumeratedJuly 31, 2017
Last updated in NPPESFebruary 9, 2026
Certification dateFebruary 9, 2026

Medicare enrollment

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

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2017 (9 years in practice)
Group practice Catholic Health Initiatives Colorado — 1266 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations7 on file with Medicare

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