Karen O'Brien, DO
Emergency Medicine Physician · Fishersville, VA
Karen O'Brien, DO is an emergency medicine physician with a practice address in Fishersville, Virginia, and NPI 1497234355, issued on Aug 11, 2018. Check the license (Virginia 0102206485, as entered in NPPES) on the Virginia Department of Health Professions; the Medicare figures below come from public CMS files.
- Name
- Karen O'Brien
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 0102206485 VA
Self-reported in NPPES; status is on the state search - Practice location
- 78 Medical Center Dr, Fishersville, VA 22939
- Phone
- (540) 332-4423
- Enumerated
- Aug 11, 2018
- Record last updated
- Jul 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210610000216); accepts Medicare assignment
- Medical or professional school
- Lake Erie College Of Osteopathic Medicine, Erie, 2018
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,715 in Virginia → Look up another NPI →
Also registered at 78 Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Georgina Abah, MDStudent in an Organized Health Care Education/Training Program1114860400
- Jessica Adkinson, FNPFamily Nurse Practitioner1265289540
- Amr Al-Ramahi, MDHematology & Oncology Physician1952896268
- Steven Anhold, PA-CPhysician Assistant1770402414
- Ahmad Arab, M.D.Anesthesiology Physician1417448697
- Cristina Armengol, MDEmergency Medicine Physician1710324652
Verify Karen O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersVirginia Department of Health Professions
Search for license 0102206485Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% more Medicare Part D claims than the average emergency medicine physician in 2024
335 Medicare Part D claims for 230 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 39 claims were for opioids.
Most prescribed
- Prednisone54 claims
- Cephalexin36 claims
- Oxycodone Hcl33 claims
- Amoxicillin-Clavulanate Potass26 claims
- Ondansetron Odt23 claims
- Azithromycin19 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
- Shenandoah Emergency Medicine Specialists LLCFishersville, VA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen O'Brien among 1,715 emergency medicine physician records in Virginia
Karen O'Brien, DO is one of 1,715 emergency medicine physician records with a practice address in Virginia. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 79% of them.
- NPI issued2018 · 79% of these records are older, 19% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated2018 · median 2011 among the 956 with a school on file
- Record last updated2021 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Virginia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 emergency medicine physician records list a practice address in Fishersville
They are 21 of the 720 NPPES records with a practice address in Fishersville, and 1,715 emergency medicine physician records in Virginia.
All 1,715 in Virginia → Every provider in Fishersville → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Gregory Benbow, DOFishersville, VA 229391760454078
- Christopher Delk, MDFishersville, VA 229391255549051
- David Fosnocht, MDFishersville, VA 229391124118724
- Randy Gallagher, DOFishersville, VA 229391992759286
- William Harrell, MDFishersville, VA 229391083667802
- Lisa Hile, MDFishersville, VA 229391043375421
- Mark Howard, DOFishersville, VA 229391972583748
- Joseph Just, MDFishersville, VA 229391245282250
Common questions
What is Karen O'Brien, DO's NPI number?
Karen O'Brien, DO's National Provider Identifier (NPI) is 1497234355, issued on Aug 11, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Karen O'Brien, DO located?
The NPPES record lists a practice address at 78 Medical Center Dr, Fishersville, VA, 22939. Phone: (540) 332-4423. Providers update this record themselves, so call before visiting.
How can I verify Karen O'Brien, DO's license?
NPPES lists Virginia license number 0102206485, as entered by the provider. Search the Virginia Department of Health Professions at https://dhp.virginiainteractive.org/lookup/index. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Karen O'Brien, DO prescribe under Medicare Part D?
In 2024, Karen O'Brien, DO had 335 Medicare Part D claims for 230 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.