Dr. Nelson James Owyoung, MD
- 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
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Owyoung'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. 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
- 1073543641NPI Registry (opens in a new tab)
- 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.
- CHA Hollywood Presbyterian Medical Center1300 N Vermont Ave, Los Angeles, CA 90027 · Los Angeles CountyPhone(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.
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.
| Site | EHR vendor and product |
|---|---|
| CHA Hollywood Presbyterian Medical Center | Available with a free account |
| +8 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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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, CaliforniaPrimary
- Florida license
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.
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.
Need commercial claims for Dr. Owyoung?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Owyoung and other neurologists in California.
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.
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
- High blood pressure75%
- High cholesterol75%
- Diabetes67%
- Arthritis60%
- Chronic kidney disease55%
- Ischemic heart disease53%
- Alzheimer's and dementia49%
- 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.
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.
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
- Marc Edward Agronin, MD1 shared trial
- German Alvarez, MD1 shared trial
- Jeffrey Apter, MD1 shared trial
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
- 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.
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.
- Medical school
- Board certified in neurology
Source: Dmand AI Professional Profile Data
Sources for Dr. Nelson James Owyoung'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Clinical trials and co-investigators | ClinicalTrials.gov (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. 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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