Dr. Nelson James Owyoung, MD

  • Los Angeles, CA
  • Neurologist
NPI1073543641PAC ID7315049525
Medicare services, 2024
2,944
Medicare patients, 2024
530
Part D claims, 2024
3,984
Clinical trials
1
Hospital affiliations
5
Practice address
1300 N Vermont Ave, Los Angeles, CA 90027
Practice phone
Call (213) 413-3000
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

CHA Hollywood Presbyterian Medical Center

Hospital · Los Angeles, California

See all 9 affiliations

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Dr. Nelson James Owyoung is a neurologist in Los Angeles, California

Dr. Owyoung practices at CHA Hollywood Presbyterian Medical Center in Los Angeles, California, part of CHA Health Systems.

Dr. Owyoung's NPI, 1073543641, was assigned on July 3, 2006. Dr. Owyoung graduated from University of the East College of Medicine in 1981. Dr. Owyoung holds California license A40475.

NPI and contact details
Medicare PAC ID
7315049525
NPI enumeration date
July 3, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(213) 413-3000
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Male
Estimated age
71
Medical school graduation
1981

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

Dr. Nelson James Owyoung practices at CHA Hollywood Presbyterian Medical Center in Los Angeles, California

Dr. Owyoung's primary practice is CHA Hollywood Presbyterian Medical Center, at 1300 N Vermont Ave, Los Angeles, CA 90027 in Los Angeles County. The practice phone is (213) 413-3000.

Source: Dmand AI Affiliation Data

Dr. Nelson James Owyoung is affiliated with 9 sites of care

Dr. Owyoung's primary practice is CHA Hollywood Presbyterian Medical Center in Los Angeles, California, part of CHA Health Systems. Dr. Owyoung is also affiliated with USC Arcadia Hospital. Dmand AI also links Dr. Owyoung to 3 more hospitals, 2 skilled nursing facilities, 1 breast imaging center and 1 physician office, each named with a free account.

See all 9 affiliations for Dr. Owyoung

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

Dmand AI tracks the EHR system at Dr. Nelson James Owyoung's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Owyoung practices, 9 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
CHA Hollywood Presbyterian Medical CenterAvailable with a free account
+8 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

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Dmand AI maps EHR vendors, IT decision makers and buying committees across CHA Health Systems and 6.2K+ hospitals, with verified contacts in the same login.

Dr. Nelson James Owyoung is one of 2,207 neurologists in California

Neurology is Dr. Owyoung's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Owyoung is board certified in neurology by the American Board of Psychiatry and Neurology. Dmand AI has Dr. Owyoung's licenses on file in 2 states: California and Florida.

Specialties and state licenses

  • Neurology, CaliforniaPrimaryLicense A40475 · 1983 to 2026 · taxonomy 2084N0400X
  • Florida license1997 to 2000

Clinical focus

Dmand AI lists acute mini-stroke (TIA), carpal tunnel syndrome, cerebrovascular disease, epilepsy, fibromyalgia and chronic pain, lower back pain, muscle disease and muscle pain, fibromyalgia, and limb pain among the conditions Dr. Owyoung treats.

Neurologists near Dr. Owyoung

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. Nelson James Owyoung billed Medicare for 2,944 services in 2024

CMS data shows 2,944 Medicare services from Dr. Owyoung across 9 procedure codes in 2024, for 530 Medicare patients. Medicare paid $209,301 for them.

Medicare services, 20242,944
Medicare patients530
Paid by Medicare$209,301
Procedure codes9

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

  • 2023
  • 2024
Office and hospital visits
2023: 2,1372024: 2,91937%
Tests and treatments
2023: 182024: 1328%
Other services
2023: 02024: 12

Where Dr. Owyoung's Medicare services took place, 2024

  • In an office29010%
  • In a facility2,65490%

Dr. Owyoung compared with the California median for neurologists, 2024

  • Dr. Owyoung
  • California median
Medicare services
2,944vs 4047.3 times
Medicare patients
530vs 1902.8 times
Part D claims
3,389vs 32410.5 times

Medians across 1,995 neurologists in California with Dmand AI profiles that report each measure.

Dr. Owyoung'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. Owyoung

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

Dr. Nelson James Owyoung treated 530 Medicare patients in 2024, average age 77

CMS counts 530 Medicare patients who saw Dr. Owyoung in 2024. The largest group is 65 to 74, with 190 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 87% are also on Medicaid. Their average risk score is 2.91, 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. Owyoung's median patient age at 65, with 54% women.

Medicare patients, 2024530
Average age77
Average risk score2.91
Also on Medicaid87%

Dr. Owyoung's Medicare patients by age, 2024

Dr. Owyoung's Medicare patients by sex, 2024

  • Women29355%
  • Men23745%

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

  1. High blood pressure75%
  2. High cholesterol75%
  3. Diabetes67%
  4. Arthritis60%
  5. Chronic kidney disease55%
  6. Ischemic heart disease53%
  7. Alzheimer's and dementia49%
  8. Heart failure47%

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

Dr. Owyoung's patients across all payers

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

Patient panel by age, all payers

Median age 65

Patient panel by sex, all payers

  • Women54%
  • Men46%

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

Dr. Nelson James Owyoung wrote 3,984 Medicare Part D claims in 2024

In 2024, Dr. Owyoung wrote 3,984 Medicare Part D claims for 315 patients. 77% of them were for generic drugs. CMS names the drug for 3,389 of them, across 105 drugs with 11 or more claims each, at $1,246,271 in total drug cost. In 2023, CMS named 3,500 claims across 99 drugs.

Part D claims, 20243,984
Drugs named by CMS105
Total drug cost$1.2M
Part D patients315

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

  • Generic3,084 claims77%
  • Brand-name866 claims22%
  • Other34 claims1%

Dr. Owyoung'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.

Drug classes CMS tracks in Dr. Owyoung's Part D claims, 2024

  • Opioids3%102 of 3,984 claims
  • Antibiotics1%42 of 3,984 claims
  • Antipsychotics, patients 65 and over3%123 of 3,984 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 3,5002024: 3,3893%

Drugs named by CMS: 105 in 2024, 99 in 2023.

See all prescribing by Dr. Owyoung

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

How Dr. Nelson James Owyoung takes part in Medicare

Dr. Owyoung accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Dr. Nelson James Owyoung has worked on 1 clinical trial

Dmand AI links Dr. Owyoung to 1 clinical trial. Conditions studied include Alzheimer Disease and Tauopathies.

Conditions in Dr. Owyoung's trials

  • Alzheimer Disease
  • Tauopathies

Investigators on the most trials with Dr. Owyoung

Recent clinical trials with Dr. Owyoung

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

Dr. Nelson James Owyoung received $8,954 in industry payments from 2016 to 2025

CMS Open Payments shows 303 general payments to Dr. Owyoung from 36 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 93% of the total. SK Life Science, Inc. paid the most, $1,777.

General payments to Dr. Owyoung by program year, 2016 to 2025

General payments to Dr. Owyoung by kind, 2016 to 2025

$9Kin total
  • Food and beverage$8,37193%
  • Education$4665%
  • Speaker and faculty fees$1061%
  • Travel and lodging$110%

Companies that paid Dr. Owyoung the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Owyoung

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

Dr. Nelson James Owyoung graduated from University of the East College of Medicine

Dr. Owyoung graduated from University of the East College of Medicine in 1981.

  1. Medical schoolUniversity of the East College of Medicine
  2. Board certified in neurologyAmerican Board of Psychiatry and Neurology

Source: Dmand AI Professional Profile Data

Sources for Dr. Nelson James Owyoung'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)
Clinical trials and co-investigatorsClinicalTrials.gov (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile 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. Nelson James Owyoung

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. Nelson James Owyoung's NPI number?

Dr. Nelson James Owyoung's NPI number is 1073543641. It was assigned on July 3, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Nelson James Owyoung?

Dr. Nelson James Owyoung is a neurologist in Los Angeles, California. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).

Where does Dr. Nelson James Owyoung practice?

Dr. Owyoung practices at 1300 N Vermont Ave, Los Angeles, CA 90027. Dr. Owyoung's primary practice is CHA Hollywood Presbyterian Medical Center in Los Angeles, California, part of CHA Health Systems. Dmand AI also links Dr. Owyoung to 3 hospitals, 2 skilled nursing facilities, 1 breast imaging center and 1 physician office.

What is Dr. Nelson James Owyoung's office phone number?

The practice phone on file for Dr. Owyoung is (213) 413-3000.

What is Dr. Nelson James Owyoung's medical license number?

Dr. Owyoung holds California license A40475, one of the licenses on file in 2 states.

Which states has Dr. Nelson James Owyoung been licensed in?

Dmand AI has state licenses on file for Dr. Owyoung in California (1983 to 2026) and Florida (1997 to 2000).

Which hospitals is Dr. Nelson James Owyoung affiliated with?

Dr. Owyoung practices at CHA Hollywood Presbyterian Medical Center in Los Angeles, California. Dr. Owyoung is also affiliated with USC Arcadia Hospital. Dmand AI links Dr. Owyoung to 3 more hospitals.

Does Dr. Nelson James Owyoung accept Medicare?

Yes. CMS data shows Dr. Owyoung billed Medicare for 2,944 services in 2024, and Dr. Owyoung accepts Medicare assignment.

How many Medicare patients does Dr. Nelson James Owyoung see?

CMS counts 530 Medicare patients who saw Dr. Owyoung in 2024, with an average age of 77.

Is Dr. Nelson James Owyoung board certified?

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

Show 6 more questionsShow fewer questions

What services does Dr. Nelson James Owyoung bill to Medicare?

In 2024, Dr. Owyoung's most billed Medicare services were hospital inpatient care (99232), nursing facility care (99308) and hospital inpatient care (99222).

Where did Dr. Nelson James Owyoung go to medical school?

Dr. Owyoung graduated from University of the East College of Medicine in 1981.

What drugs does Dr. Nelson James Owyoung prescribe most?

In 2024 Medicare Part D data, Dr. Owyoung's most prescribed drugs by claims were Carbidopa-Levodopa, Memantine HCl and Donepezil HCl.

Has Dr. Nelson James Owyoung received payments from drug or device companies?

CMS Open Payments shows $8,954 in general payments to Dr. Owyoung from 36 companies from 2016 to 2025. The largest total came from SK Life Science, Inc.

How long has Dr. Nelson James Owyoung been practicing?

Dr. Owyoung graduated from medical school in 1981, 45 years ago.

Does Dr. Nelson James Owyoung do research?

Dr. Owyoung has worked on 1 clinical trial.

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