Dr. Karen Eva Halldorsdottir, MD
- Part D claims, 2024
- 42
- Industry payments
- $182
- Affiliated sites
- 3
- Medical groups
- 3
- Insurance carriers
- 1
- Practice address
- 200 S Manchester Ave, Orange, CA 92868
- Practice phone
- Call (714) 456-2332
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Regents Of The University Of Claifornia Univ Neursciences - Behavioral & Mental Health - Orange (S Manchester Ave)
Behavioral health practice · Orange, California
Find Dr. Halldorsdottir's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Karen Eva Halldorsdottir is a neurologist in Orange, California
Dr. Halldorsdottir practices at Regents Of The University Of Claifornia Univ Neursciences - Behavioral & Mental Health - Orange (S Manchester Ave) in Orange, California.
Dr. Halldorsdottir's NPI, 1669964540, was assigned on June 5, 2018. Dr. Halldorsdottir graduated from University of Iceland in 2015. Dr. Halldorsdottir's California license number on file is A177325.
- NPI
- 1669964540NPI Registry (opens in a new tab)
- NPI enumeration date
- June 5, 2018
- NPI status
- Active
- Practice phone
- (714) 456-2332
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Karen Eva Halldorsdottir practices at 2 locations in Orange, California
Dr. Halldorsdottir's primary practice is Regents of the University of Claifornia Univ Neursciences - Behavioral & Mental Health - Orange (S Manchester Ave), at 200 S Manchester Ave, Orange, CA 92868. The practice phone is (714) 456-2332. The NPI Registry lists Dr. Halldorsdottir's practice address as 101 S The City Dr, Orange, CA 92868.
- Regents of the University of Claifornia Univ Neursciences - Behavioral & Mental Health - Orange (S Manchester Ave)Primary200 S Manchester Ave, Orange, CA 92868Phone(714) 456-2332
- NPI Registry address101 S The City Dr, Orange, CA 92868 · Orange CountyPhone(714) 456-2332
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. Karen Eva Halldorsdottir is affiliated with 3 sites of care and 3 medical groups
Dr. Halldorsdottir's primary practice is Regents Of The University Of Claifornia Univ Neursciences - Behavioral & Mental Health - Orange (S Manchester Ave) in Orange, California. The medical group on file is UCI Health Physicians. Dmand AI also links Dr. Halldorsdottir to 2 more group practices and clinics and 2 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Karen Eva Halldorsdottir's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Halldorsdottir practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Regents Of The University Of Claifornia Univ Neursciences - Behavioral & Mental Health - Orange (S Manchester Ave) | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Karen Eva Halldorsdottir is one of 2,207 neurologists in California
Neurology is Dr. Halldorsdottir's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dmand AI has Dr. Halldorsdottir's licenses on file in 2 states: California and Vermont.
Specialties and state licenses
- Neurology, CaliforniaPrimary
- Vermont license
Neurologists near Dr. Halldorsdottir
Counts of neurologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Karen Eva Halldorsdottir's patients have a median age of 50
Across all payers, Dmand AI patient panel data puts Dr. Halldorsdottir's median patient age at 50, with 50% women.
Dr. Halldorsdottir's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 50
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Karen Eva Halldorsdottir wrote 42 Medicare Part D claims in 2024
In 2024, Dr. Halldorsdottir wrote 42 Medicare Part D claims for 17 patients. 95% of them were for generic drugs. CMS names the drug for 15 of them, across 1 drug with 11 or more claims each, at $267 in total drug cost. In 2023, CMS named 155 claims across 8 drugs.
Dr. Halldorsdottir's Part D claims by kind of drug, 2024
- Generic40 claims95%
- Brand-name and other2 claims5%
Dr. Halldorsdottir's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1552024: 1590%
Drugs named by CMS: 1 in 2024, 8 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Karen Eva Halldorsdottir received $182 in industry payments from 2022 to 2023
CMS Open Payments shows 6 general payments to Dr. Halldorsdottir from 3 drug and device companies from 2022 to 2023. Food and beverage make up the largest share, 100% of the total. Argenx US, Inc. paid the most, $125.
General payments to Dr. Halldorsdottir by program year, 2022 to 2023
Companies that paid Dr. Halldorsdottir the most, 2022 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Karen Eva Halldorsdottir graduated from University of Iceland
Dr. Halldorsdottir graduated from University of Iceland in 2015.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Karen Eva Halldorsdottir accepts plans from 1 insurance carrier
Dr. Halldorsdottir is in network with 1 carrier, including VT State Medicaid. Medicaid plans come from the most carriers, 1. Check the plan with the practice before a visit.
- VT State Medicaid
Source: Dmand AI Insurance Network Data
Sources for Dr. Karen Eva Halldorsdottir's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Karen Eva Halldorsdottir
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Karen Eva Halldorsdottir's NPI number?
Dr. Karen Eva Halldorsdottir's NPI number is 1669964540. It was assigned on June 5, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. Karen Eva Halldorsdottir?
Dr. Karen Eva Halldorsdottir is a neurologist in Orange, California. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. Karen Eva Halldorsdottir practice?
Dr. Halldorsdottir practices at 200 S Manchester Ave, Orange, CA 92868. Dr. Halldorsdottir also practices at 101 S The City Dr, Orange, CA 92868. Dr. Halldorsdottir's primary practice is Regents Of The University Of Claifornia Univ Neursciences - Behavioral & Mental Health - Orange (S Manchester Ave) in Orange, California. Dmand AI also links Dr. Halldorsdottir to 2 group practices and clinics and 2 medical groups.
What is Dr. Karen Eva Halldorsdottir's office phone number?
The practice phone on file for Dr. Halldorsdottir is (714) 456-2332.
What is Dr. Karen Eva Halldorsdottir's medical license number?
Dr. Halldorsdottir's California license number on file is A177325, one of the licenses on file in 2 states.
Which states has Dr. Karen Eva Halldorsdottir been licensed in?
Dmand AI has state licenses on file for Dr. Halldorsdottir in California (2022 to 2024) and Vermont (2018 to 2023).
What medical group is Dr. Karen Eva Halldorsdottir part of?
Dr. Halldorsdottir is linked to UCI Health Physicians. Dmand AI links Dr. Halldorsdottir to 2 more medical groups.
Where did Dr. Karen Eva Halldorsdottir go to medical school?
Dr. Halldorsdottir graduated from University of Iceland in 2015.
What drugs does Dr. Karen Eva Halldorsdottir prescribe most?
In 2024 Medicare Part D data, Dr. Halldorsdottir's most prescribed drugs by claims were Prednisone.
Has Dr. Karen Eva Halldorsdottir received payments from drug or device companies?
CMS Open Payments shows $182 in general payments to Dr. Halldorsdottir from 3 companies from 2022 to 2023. The largest total came from Argenx US, Inc.
How long has Dr. Karen Eva Halldorsdottir been practicing?
Dr. Halldorsdottir graduated from medical school in 2015, 11 years ago.
What insurance does Dr. Karen Eva Halldorsdottir accept?
Dr. Halldorsdottir is in network with 1 carrier, including VT State Medicaid. Medicaid plans come from the most carriers, 1. Check the plan with the practice before a visit.
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