Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Daniel L O'Brien, DO

Individual provider Family Medicine Physician · NPI 1144404120

Dr. Daniel L O'Brien, DO is registered under Family Practice in Lakewood, Colorado. Qualified in 2007, 19 years ago. Practices with Colorado Permanente Medical Group PC, a 1,325-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Colorado.

Years since qualifying
19
Licensed in
CO
In the registry since
2007
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

8383 W Alameda Ave
Lakewood, CO 80226-3007
Phone: (303) 338-4545
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 11245 Huron St, Westminster, CO 80234-2806 — (303) 338-4545

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 49274 (CO)

Record details

NPI number1144404120
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedDecember 26, 2007
Last updated in NPPESApril 26, 2021
Certification dateApril 26, 2021

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolOTHER
Graduated 2007 (19 years in practice)
Group practice Colorado Permanente Medical Group Pc — 1325 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations6 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 patients24
Services billed 267 a service is one billed item, such as a visit, a test or a procedure
Average patient age69

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.

Colleagues at Colorado Permanente Medical Group PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1325 clinicians in the practice; 12 are shown here.

Other providers in Lakewood