Dr. Masaki Nagamine, MD

  • Orange, CA
  • Vascular neurology physician
NPI1144751660PAC ID7517290257
Medicare services, 2024
354
Medicare patients, 2024
199
Part D claims, 2024
257
Publications
16
Clinical trials
2
Practice address
101 City Drive South, Orange, CA 92868
Practice phone
Call (714) 456-7890
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

UCI Health - Orange

Hospital · Orange, California

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Dr. Masaki Nagamine is a vascular neurology physician in Orange, California

Dr. Nagamine practices at UCI Health - Orange in Orange, California, part of UC Irvine.

Dr. Nagamine's NPI, 1144751660, was assigned on March 26, 2017. Dr. Nagamine graduated from College of Human Medicine - Grand Rapids in 2017. Dr. Nagamine holds California license A160415.

NPI and contact details
Medicare PAC ID
7517290257
NPI enumeration date
March 26, 2017
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(714) 456-7890
Professional email
Get email
Personal email
Get email
Mobile number
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Sex
Male
Estimated age
35
Medical school graduation
2017

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Masaki Nagamine practices at UCI Health - Orange in Orange, California

Dr. Nagamine's primary practice is UCI Health - Orange, at 101 City Drive South, Orange, CA 92868 in Orange County. The practice phone is (714) 456-7890.

  • UCI Health - Orange
    101 City Drive South, Orange, CA 92868 · Orange CountyPhone(714) 456-7890

Source: Dmand AI Affiliation Data

Dr. Masaki Nagamine is affiliated with 1 site of care and 1 medical group

Dr. Nagamine's primary practice is UCI Health - Orange in Orange, California, part of UC Irvine. The medical group on file is UCI Health Physicians.

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Masaki Nagamine's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nagamine practices. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
UCI Health - OrangeAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Masaki Nagamine is one of 72 vascular neurology physicians in California

Vascular neurology is Dr. Nagamine's primary specialty in the NPI Registry, under taxonomy code 2084V0102X. Dr. Nagamine is board certified in neurology by the American Board of Psychiatry and Neurology. Dr. Nagamine is licensed in California.

Specialties and state licenses

  • Vascular neurology, CaliforniaPrimaryLicense A160415 · 2019 to 2027 · taxonomy 2084V0102X

Clinical focus

Dmand AI lists acute mini-stroke (TIA), carpal tunnel syndrome, cerebrovascular disease, epilepsy, headaches, neuropathy, seizures and stroke among the conditions Dr. Nagamine treats.

Vascular neurology physicians near Dr. Nagamine

Counts of vascular neurology physicians 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. Masaki Nagamine billed Medicare for 354 services in 2024

CMS data shows 354 Medicare services from Dr. Nagamine across 5 procedure codes in 2024, for 199 Medicare patients. Medicare paid $44,052 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 2024354
Medicare patients199
Paid by Medicare$44,052
Procedure codes5

Dr. Nagamine's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 2892024: 35422%

Dr. Nagamine compared with the California median for vascular neurology physicians, 2024

  • Dr. Nagamine
  • California median
Medicare services
354vs 27628% above
Medicare patients
199vs 199Close to median
Part D claims
116vs 343.4 times

Medians across 65 vascular neurology physicians in California with Dmand AI profiles that report each measure.

Dr. Nagamine's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Nagamine

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Masaki Nagamine treated 199 Medicare patients in 2024, average age 73

CMS counts 199 Medicare patients who saw Dr. Nagamine in 2024. The largest group is 75 to 84, with 68 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 61% are also on Medicaid. Their average risk score is 2.78, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Nagamine's median patient age at 59, with 53% women.

Medicare patients, 2024199
Average age73
Average risk score2.78
Also on Medicaid61%

Dr. Nagamine's Medicare patients by age, 2024

Dr. Nagamine's Medicare patients by sex, 2024

  • Women9447%
  • Men10553%

Chronic conditions among Dr. Nagamine's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Stroke or TIA74%
  4. Diabetes58%
  5. Arthritis47%
  6. Chronic kidney disease45%
  7. Ischemic heart disease43%
  8. Heart failure37%

Share of Medicare patients with each condition. A patient can have several.

Dr. Nagamine's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 59

Patient panel by sex, all payers

  • Women53%
  • Men46%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Masaki Nagamine wrote 257 Medicare Part D claims in 2024

In 2024, Dr. Nagamine wrote 257 Medicare Part D claims for 49 patients. 84% of them were for generic drugs. CMS names the drug for 116 of them, across 6 drugs with 11 or more claims each, at $25,595 in total drug cost. In 2023, CMS named 83 claims across 4 drugs.

Part D claims, 2024257
Drugs named by CMS6
Total drug cost$25,595
Part D patients49

Dr. Nagamine's Part D claims by kind of drug, 2024

  • Generic216 claims84%
  • Brand-name and other41 claims16%

Dr. Nagamine'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: 832024: 11640%

Drugs named by CMS: 6 in 2024, 4 in 2023.

See all prescribing by Dr. Nagamine

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

Dr. Masaki Nagamine offers telehealth to Medicare patients

Dr. Nagamine accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Nagamine as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Dr. Masaki Nagamine has 16 publications on record

Dmand AI links 16 papers to Dr. Nagamine, published from 2012 to 2024. 2012 was the busiest year, with 3. The most frequent topics are Pruritus, Histamine and Mice, Inbred C57BL. Dr. Nagamine has published most often in J Neurophysiol. Dr. Nagamine's most frequent co-authors are Auva Davoodi, MD, Wengui Yu, MD and Daniel S. Chow, MD.

Papers16
Years published2012 to 2024

Dr. Nagamine's papers by year, 2012 to 2024

Topics Dr. Nagamine writes about most

  • Pruritus
  • Histamine
  • Mice, Inbred C57BL
  • Chloroquine
  • Ganglia, Spinal
  • Injections, Intradermal
  • Peptide Fragments
  • Sensory Receptor Cells

Dr. Nagamine's most frequent co-authors

Recent publications by Dr. Nagamine

See all 16 publications and co-authors

See who Dr. Nagamine researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Nagamine works with, so you can find a warm path to the right vascular neurology physicians.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Masaki Nagamine has worked on 2 clinical trials

Dmand AI links Dr. Nagamine to 2 clinical trials. 1 is still active or recruiting. Conditions studied include Hemorrhage, Ischemic Stroke and Pathological Conditions, Signs and Symptoms.

Conditions in Dr. Nagamine's trials

  • Hemorrhage
  • Ischemic Stroke
  • Pathological Conditions, Signs and Symptoms
  • Sleep Apnea, Obstructive

Investigators on the most trials with Dr. Nagamine

Recent clinical trials with Dr. Nagamine

Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)

Dr. Masaki Nagamine received $70 in industry payments from 2023 to 2025

CMS Open Payments shows 3 general payments to Dr. Nagamine from 3 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 100% of the total. Bayer HealthCare Pharmaceuticals Inc. paid the most, $34.

General payments to Dr. Nagamine by program year, 2023 to 2025

Companies that paid Dr. Nagamine the most, 2023 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Nagamine

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Masaki Nagamine serves on 3 committees

Dr. Nagamine serves on UCI Department of Neurology Grand Rounds Committee, UCI Department of Neurology Education Committee and UCI Department of Neurology Morbidity and Mortality Conference.

Dr. Nagamine's committees and leadership roles

UCI Department of Neurology Grand Rounds CommitteeDirector
2023 to present
UCI Department of Neurology Education CommitteeMember
2022 to present
UCI Department of Neurology Morbidity and Mortality ConferenceCoordinator
2022 to present

Source: Dmand AI Professional Profile Data

Dr. Masaki Nagamine graduated from College of Human Medicine - Grand Rapids

Dr. Nagamine graduated from College of Human Medicine - Grand Rapids in 2017. Dr. Nagamine is a member of AAN.

  1. Medical schoolCollege of Human Medicine - Grand Rapids
  2. Board certified in neurologyAmerican Board of Psychiatry and Neurology
  3. Board certified in vascular neurologyAmerican Board of Psychiatry and Neurology

Source: Dmand AI Professional Profile Data

Dr. Masaki Nagamine accepts plans from 13 insurance carriers

Dr. Nagamine is in network with 13 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Michigan
  • United Healthcare
  • Elevance
  • HCSC
  • Blue Cross Blue Shield of Massachusetts
  • Regence Health Plans
  • Alliant Health Plans
  • +5 more carriersWith a free account

Plan types Dr. Nagamine accepts, by number of carriers

  1. PPO9
  2. Medicare7
  3. HMO6
  4. EPO4
  5. POS3

Source: Dmand AI Insurance Network Data

Sources for Dr. Masaki Nagamine's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Clinical trials and co-investigatorsDmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Masaki Nagamine

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. Masaki Nagamine's NPI number?

Dr. Masaki Nagamine's NPI number is 1144751660. It was assigned on March 26, 2017, and it is active in the NPI Registry.

What kind of doctor is Dr. Masaki Nagamine?

Dr. Masaki Nagamine is a vascular neurology physician in Orange, California. The primary specialty in the NPI Registry is Vascular Neurology Physician (taxonomy code 2084V0102X).

Where does Dr. Masaki Nagamine practice?

Dr. Nagamine practices at 101 City Drive South, Orange, CA 92868. Dr. Nagamine's primary practice is UCI Health - Orange in Orange, California, part of UC Irvine.

What is Dr. Masaki Nagamine's office phone number?

The practice phone on file for Dr. Nagamine is (714) 456-7890.

What is Dr. Masaki Nagamine's medical license number?

Dr. Nagamine holds California license A160415.

Which hospitals is Dr. Masaki Nagamine affiliated with?

Dr. Nagamine practices at UCI Health - Orange in Orange, California.

What medical group is Dr. Masaki Nagamine part of?

Dr. Nagamine is linked to UCI Health Physicians.

Does Dr. Masaki Nagamine accept Medicare?

Yes. CMS data shows Dr. Nagamine billed Medicare for 354 services in 2024, and Dr. Nagamine accepts Medicare assignment.

Does Dr. Masaki Nagamine offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Nagamine as offering telehealth services.

How many Medicare patients does Dr. Masaki Nagamine see?

CMS counts 199 Medicare patients who saw Dr. Nagamine in 2024, with an average age of 73.

Show 9 more questionsShow fewer questions

Is Dr. Masaki Nagamine board certified?

Yes. Dr. Nagamine is board certified in neurology by the American Board of Psychiatry and Neurology.

What services does Dr. Masaki Nagamine bill to Medicare?

In 2024, Dr. Nagamine's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99223) and office visit, established patient (99215).

Where did Dr. Masaki Nagamine go to medical school?

Dr. Nagamine graduated from College of Human Medicine - Grand Rapids in 2017.

What drugs does Dr. Masaki Nagamine prescribe most?

In 2024 Medicare Part D data, Dr. Nagamine's most prescribed drugs by claims were Atorvastatin Calcium, Levetiracetam and Eliquis.

Has Dr. Masaki Nagamine received payments from drug or device companies?

CMS Open Payments shows $70 in general payments to Dr. Nagamine from 3 companies from 2023 to 2025. The largest total came from Bayer HealthCare Pharmaceuticals Inc.

How long has Dr. Masaki Nagamine been practicing?

Dr. Nagamine graduated from medical school in 2017, 9 years ago.

Does Dr. Masaki Nagamine do research?

Dmand AI links 16 publications to Dr. Nagamine, published from 2012 to 2024. Dr. Nagamine has worked on 2 clinical trials.

Who does Dr. Masaki Nagamine publish with?

Dr. Nagamine's most frequent co-authors are Auva Davoodi, MD (8 shared papers), Wengui Yu, MD (6 shared papers) and Daniel S. Chow, MD (4 shared papers).

What insurance does Dr. Masaki Nagamine accept?

Dr. Nagamine is in network with 13 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.

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