Karen Eva Halldorsdottir, MD
Neurology Physician · Orange, CA
Karen Eva Halldorsdottir, MD is a neurology physician with a practice address in Orange, California, and NPI 1669964540, issued on Jun 5, 2018. Check the license (California A177325, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karen Eva Halldorsdottir
- Credential
- MD
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- A177325 CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 S Manchester Ave Ste 110, Orange, CA 92868
- Phone
- (714) 456-2332
- Enumerated
- Jun 5, 2018
- Record last updated
- Oct 10, 2023
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 2,339 in California → Look up another NPI →
Also registered at 200 S Manchester Ave Ste 110
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jeffrey Mullen, MDNeuromuscular Medicine (Psychiatry & Neurology) Physician1447614276
Verify Karen Eva Halldorsdottir in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A177325Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average neurology physician in 2024
42 Medicare Part D claims for 17 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D.
Most prescribed
- Prednisone15 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.
The MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Karen Eva Halldorsdottir among 2,339 neurology physician records in California
Karen Eva Halldorsdottir, MD is one of 2,339 neurology physician records with a practice address in California. 81% 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 84% of them.
- NPI issued2018 · 84% of these records are older, 12% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2023 · 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 2084N0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurology Physician providers in California
There are 2,339 neurology physician records in California.
All 2,339 in California → Every provider in Orange → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Daniela Bota, MDOrange, CA 928681942499884
- William Cable, MDOrange, CA 928681548340631
- Michael Demetriou, MDOrange, CA 928681992885099
- Dale Di Stefano, M.D.Orange, CA 928681902822968
- Malcolm Dick, PHDOrange, CA 928681235182205
- Vivek Jain, MDOrange, CA 928681871679373
- Claudia Kawas, MDOrange, CA 928681629158894
- Mayank Pathak, M.D.Orange, CA 928681114959475
Common questions
What is Karen Eva Halldorsdottir, MD's NPI number?
Karen Eva Halldorsdottir, MD's National Provider Identifier (NPI) is 1669964540, issued on Jun 5, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Karen Eva Halldorsdottir, MD located?
The NPPES record lists a practice address at 200 S Manchester Ave Ste 110, Orange, CA, 92868. Phone: (714) 456-2332. Providers update this record themselves, so call before visiting.
How can I verify Karen Eva Halldorsdottir, MD's license?
NPPES lists California license number A177325, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Karen Eva Halldorsdottir, MD prescribe under Medicare Part D?
In 2024, Karen Eva Halldorsdottir, MD had 42 Medicare Part D claims for 17 beneficiaries; the average among neurology physician prescribers was 1,370. Part D covers Medicare prescriptions only.
What is Karen Eva Halldorsdottir, MD's MIPS final score?
The 2023 MIPS final score is 100 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.