Corey Robert O'Brien, M.D.
Hospitalist Physician · Kirkland, WA
Corey Robert O'Brien, M.D. is a hospitalist physician with a practice address in Kirkland, Washington, and NPI 1871940312, issued on May 14, 2016. Check the license (Washington MD61134393, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Corey Robert O'Brien
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- MD61134393 WA
Self-reported in NPPES; status is on the state search - Practice location
- 12040 NE 128TH St, Kirkland, WA 98034
- Phone
- (425) 899-1854
- Enumerated
- May 14, 2016
- Record last updated
- Mar 21, 2023
- Medicaid ID
- 1871940312 WA
- Medicare enrollment
- Enrolled (PECOS I20210519002971); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 2016
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 793 in Washington → Look up another NPI →
Also registered at 12040 NE 128TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Erin Addison, M.D.Internal Medicine Physician1245573385
- Ziad Alsoufi, MDHospitalist Physician1760652648
- Kathleen AmbielliPharmacist1407612526
- Kevin AntoineOccupational Therapist1528896586
- Warren Appleton, M.D.Emergency Medicine Physician1700831591
- Seth Arlow, MDAnesthesiology Physician1891749586
Verify Corey Robert O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD61134393Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
33% fewer Medicare Part D claims than the average hospitalist physician in 2024
349 Medicare Part D claims for 120 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 16 claims were for opioids.
Most prescribed
- Eliquis18 claims
- Prednisone17 claims
- Furosemide15 claims
- Metoprolol Succinate15 claims
- Pantoprazole Sodium15 claims
- Oxycodone Hcl13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- King County Public Hospital District NO 2Kirkland, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Corey Robert O'Brien among 793 hospitalist physician records in Washington
Corey Robert O'Brien, M.D. is one of 793 hospitalist physician records with a practice address in Washington. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 64% of them.
- NPI issued2016 · 64% of these records are older, 31% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated2016 · median 2011 among the 649 with a school on file
- Record last updated2023 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in Washington
There are 793 hospitalist physician records in Washington.
All 793 in Washington → Every provider in Kirkland → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Ziad Alsoufi, MDKirkland, WA 980341760652648
- Katharine Beeler, M.D.Kirkland, WA 980341962781492
- Mark Connor, M.D.Kirkland, WA 980341801244462
- Kelly FujikawaKirkland, WA 980341972987691
- Kathryn Horton, M.D.Kirkland, WA 980341710305578
- Antonette Kanishka Karrthik, M.D.Kirkland, WA 980341669834768
- Rashi Khanna, M.DKirkland, WA 980341518308840
- Mary Lacy, M.D.Kirkland, WA 980341598064040
Common questions
What is Corey Robert O'Brien, M.D.'s NPI number?
Corey Robert O'Brien, M.D.'s National Provider Identifier (NPI) is 1871940312, issued on May 14, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Corey Robert O'Brien, M.D. located?
The NPPES record lists a practice address at 12040 NE 128TH St, Kirkland, WA, 98034. Phone: (425) 899-1854. Providers update this record themselves, so call before visiting.
How can I verify Corey Robert O'Brien, M.D.'s license?
NPPES lists Washington license number MD61134393, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Corey Robert O'Brien, M.D. prescribe under Medicare Part D?
In 2024, Corey Robert O'Brien, M.D. had 349 Medicare Part D claims for 120 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.