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

Corey Robert O'Brien, MD

Individual provider Internal Medicine Physician · NPI 1871940312

Corey Robert O'Brien, MD is a Hospitalist in Kirkland, Washington. Graduated from Georgetown University School of Medicine in 2016, 10 years ago. Practices with King County Public Hospital District No 2, a 585-clinician group and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
10
Trained at
Georgetown University School of Medicine
Licensed in
WA
In the registry since
2016
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

12040 NE 128th St
Kirkland, WA 98034-3013
Phone: (425) 899-1854
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence MD61134393 (WA)
Internal Medicine Physician Taxonomy 207R00000X · Licence MD61134393 (WA)

Record details

NPI number1871940312
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 14, 2016
Last updated in NPPESMarch 21, 2023
Certification dateMarch 21, 2023

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolGEORGETOWN UNIVERSITY SCHOOL OF MEDICINE
Graduated 2016 (10 years in practice)
Group practice King County Public Hospital District No 2 — 585 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of nail tissue 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients174
Services billed 607 a service is one billed item, such as a visit, a test or a procedure
Average patient age79

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at King County Public Hospital District No 2

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 585 clinicians in the practice; 12 are shown here.

Other providers in Kirkland