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
Show map & directions

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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

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients115
Services billed 303 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $335 9 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Catholic Health Initiatives Colorado

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1266 clinicians in the practice; 12 are shown here.

Other providers in Lakewood