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Dr. John W. Chen, MD
NPI1841210846PAC ID5991966202
- Medicare services, 2024
- 672
- Medicare patients, 2024
- 215
- Part D claims, 2024
- 2,770
- Publications
- 3
- Hospital affiliations
- 2
- Practice address
- 13420 Newport Ave, Tustin, CA 92780
- Practice phone
- Call (714) 202-0218
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Elite Neurology of Orange County
Tustin, California
Find Dr. Chen'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. John W. Chen is a neurologist in Tustin, California
Dr. Chen practices at Elite Neurology of Orange County in Tustin, California.
Dr. Chen's NPI, 1841210846, was assigned on July 20, 2006. Dr. Chen graduated from University Of Michigan Medical School in 1993. Dr. Chen holds California license G81195.
NPI and contact details
- NPI
- 1841210846NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5991966202
- NPI enumeration date
- July 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 202-0218
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John W. Chen practices at Elite Neurology of Orange County in Tustin, California
Dr. Chen's primary practice is Elite Neurology of Orange County, at 13420 Newport Ave, Tustin, CA 92780 in Orange County. The practice phone is (714) 202-0218.
- Elite Neurology of Orange County13420 Newport Ave, Tustin, CA 92780 · Orange CountyPhone(714) 202-0218
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John W. Chen is affiliated with 4 sites of care and 1 medical group
Dr. Chen's primary practice is Elite Neurology of Orange County in Tustin, California. Dr. Chen is also affiliated with Orange County Global Medical Center. The medical group on file is Elite Neurology of Orange County. Dmand AI also links Dr. Chen to 1 more hospital and 1 group practice or clinic, each named with a free account.
Elite Neurology of Orange CountyPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John W. Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Elite Neurology of Orange County | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John W. Chen is one of 2,207 neurologists in California
Neurology is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Chen is board certified in neurology by the American Board of Psychiatry and Neurology. Dmand AI has Dr. Chen's licenses on file in 2 states: California and Michigan.
Specialties and state licenses
- Neurology, CaliforniaPrimary
- Michigan license
Clinical focus
Dmand AI lists acute mini-stroke (TIA), alzheimer's disease, carpal tunnel syndrome, cerebrovascular disease, encephalopathy, epilepsy, essential tremor and fibromyalgia and chronic pain among the conditions Dr. Chen treats.
Neurologists near Dr. Chen
Counts of neurologists with a Dmand AI profile, by place and practice. Each opens the list.
2,207neurologists in California
4neurologists in Tustin
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John W. Chen billed Medicare for 672 services in 2024
CMS data shows 672 Medicare services from Dr. Chen across 7 procedure codes in 2024, for 215 Medicare patients. Medicare paid $73,585 for them.
Medicare services, 2024672
Medicare patients215
Paid by Medicare$73,585
Procedure codes7
Dr. Chen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8592024: 60430%
- Tests and treatments
- 2023: 1362024: 6850%
Where Dr. Chen's Medicare services took place, 2024
- In an office33450%
- In a facility33850%
Dr. Chen compared with the California median for neurologists, 2024
- Dr. Chen
- California median
- Medicare services
- 672vs 40466% above
- Medicare patients
- 215vs 19013% above
- Part D claims
- 2,471vs 3247.6 times
Medians across 1,995 neurologists in California with Dmand AI profiles that report each measure.
Dr. Chen'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. Chen?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chen and other neurologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John W. Chen treated 215 Medicare patients in 2024, average age 73
CMS counts 215 Medicare patients who saw Dr. Chen in 2024. The largest group is 65 to 74, with 83 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 43% are also on Medicaid. Their average risk score is 1.99, 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. Chen's median patient age at 66, with 50% women.
Medicare patients, 2024215
Average age73
Average risk score1.99
Also on Medicaid43%
Dr. Chen's Medicare patients by age, 2024
Dr. Chen's Medicare patients by sex, 2024
- Women11855%
- Men9745%
Chronic conditions among Dr. Chen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis54%
- Diabetes37%
- Stroke or TIA37%
- Mood disorders33%
- Depression30%
- Ischemic heart disease30%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women50%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John W. Chen wrote 2,770 Medicare Part D claims in 2024
In 2024, Dr. Chen wrote 2,770 Medicare Part D claims for 352 patients. 83% of them were for generic drugs. CMS names the drug for 2,471 of them, across 70 drugs with 11 or more claims each, at $1,643,338 in total drug cost. In 2023, CMS named 2,175 claims across 71 drugs.
Part D claims, 20242,770
Drugs named by CMS70
Total drug cost$1.6M
Part D patients352
Dr. Chen's Part D claims by kind of drug, 2024
- Generic2,312 claims83%
- Brand-name443 claims16%
- Other15 claims1%
Dr. Chen'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. Chen's Part D claims, 2024
- Opioids5%126 of 2,770 claims
- Antipsychotics, patients 65 and over1%30 of 2,770 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: 2,1752024: 2,47114%
Drugs named by CMS: 70 in 2024, 71 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. John W. Chen takes part in Medicare
Dr. Chen 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. John W. Chen has 3 publications on record
Dmand AI links 3 papers to Dr. Chen, published from 2014 to 2019. Dr. Chen's most frequent co-authors are Raphael Guzman, MD, Billy W. Loo, MD, PhD and Sahar Rosenblum, MD.
Papers3
Years published2014 to 2019
Dr. Chen's papers by year, 2014 to 2019
Dr. Chen's most frequent co-authors
- Raphael Guzman, MD1 shared paper
- Billy W. Loo, MD, PhD1 shared paper
- Sahar Rosenblum, MD1 shared paper
Recent publications by Dr. Chen
Pediatr Neonatol
AnisotropyCorpus CallosumDiffusion Tensor Imaging
See who Dr. Chen researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chen works with, so you can find a warm path to the right neurologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John W. Chen received $21,372 in industry payments from 2016 to 2025
CMS Open Payments shows 1,037 general payments to Dr. Chen from 70 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 93% of the total. Biogen, Inc. paid the most, $3,130.
General payments to Dr. Chen by program year, 2016 to 2025
General payments to Dr. Chen by kind, 2016 to 2025
$21.4Kin total
- Food and beverage$19,91993%
- Consulting fees$1,2156%
- Education$1561%
- Speaker and faculty fees$760%
- Gifts$70%
Companies that paid Dr. Chen 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. John W. Chen has 1 award and honors on record
Dmand AI lists 1 award for Dr. Chen, most recently CMS Stage 1 EHR in 2012.
Awards and honors for Dr. Chen
- 2012
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. John W. Chen graduated from University Of Michigan Medical School
Dr. Chen graduated from University Of Michigan Medical School in 1993. Dr. Chen is a member of AAN.
- Medical school
- Board certified in neurology
Source: Dmand AI Professional Profile Data
Dr. John W. Chen accepts plans from 9 insurance carriers
Dr. Chen is in network with 9 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and Elevance. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- Elevance
- HCSC
- LA Care
- Regence Health Plans
- CMS Medicare
- Humana
- +1 more carriersWith a free account
Plan types Dr. Chen accepts, by number of carriers
- Medicare8
- PPO5
- HMO2
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. John W. Chen'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 Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. John W. Chen
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. John W. Chen's NPI number?
Dr. John W. Chen's NPI number is 1841210846. It was assigned on July 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John W. Chen?
Dr. John W. Chen is a neurologist in Tustin, California. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. John W. Chen practice?
Dr. Chen practices at 13420 Newport Ave, Tustin, CA 92780. Dr. Chen's primary practice is Elite Neurology of Orange County in Tustin, California. Dmand AI also links Dr. Chen to 1 hospital and 1 group practice or clinic.
What is Dr. John W. Chen's office phone number?
The practice phone on file for Dr. Chen is (714) 202-0218.
What is Dr. John W. Chen's medical license number?
Dr. Chen holds California license G81195, one of the licenses on file in 2 states.
Which states has Dr. John W. Chen been licensed in?
Dmand AI has state licenses on file for Dr. Chen in California (1995 to 2027) and Michigan (1993 to 1994).
Which hospitals is Dr. John W. Chen affiliated with?
Dr. Chen is affiliated with Orange County Global Medical Center. Dmand AI links Dr. Chen to 1 more hospital.
What medical group is Dr. John W. Chen part of?
Dr. Chen is linked to Elite Neurology of Orange County.
Does Dr. John W. Chen accept Medicare?
Yes. CMS data shows Dr. Chen billed Medicare for 672 services in 2024, and Dr. Chen accepts Medicare assignment.
How many Medicare patients does Dr. John W. Chen see?
CMS counts 215 Medicare patients who saw Dr. Chen in 2024, with an average age of 73.
Show 9 more questionsShow fewer questions
Is Dr. John W. Chen board certified?
Yes. Dr. Chen is board certified in neurology by the American Board of Psychiatry and Neurology.
What services does Dr. John W. Chen bill to Medicare?
In 2024, Dr. Chen's most billed Medicare services were hospital inpatient care (99233), office visit, established patient (99214) and office visit, established patient (99215).
Where did Dr. John W. Chen go to medical school?
Dr. Chen graduated from University Of Michigan Medical School in 1993.
What drugs does Dr. John W. Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Gabapentin, Donepezil HCl and Memantine HCl.
Has Dr. John W. Chen received payments from drug or device companies?
CMS Open Payments shows $21,372 in general payments to Dr. Chen from 70 companies from 2016 to 2025. The largest total came from Biogen, Inc.
How long has Dr. John W. Chen been practicing?
Dr. Chen graduated from medical school in 1993, 33 years ago.
Does Dr. John W. Chen do research?
Dmand AI links 3 publications to Dr. Chen, published from 2014 to 2019.
Who does Dr. John W. Chen publish with?
Dr. Chen's most frequent co-authors are Raphael Guzman, MD (1 shared paper), Billy W. Loo, MD, PhD (1 shared paper) and Sahar Rosenblum, MD (1 shared paper).
What insurance does Dr. John W. Chen accept?
Dr. Chen is in network with 9 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and Elevance. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
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