Adenosine TriphosphateBiological TransportChlorides
Dr. Roger Christopher Chang, MD, PhD
NPI1679035216
- Medicare patients, 2024
- 18
- Part D claims, 2024
- 35
- Publications
- 9
- MIPS score, 2024
- 89
- Hospital affiliations
- 2
- Practice address
- 300 Pasteur Drive, Stanford, CA 94305
- Practice phone
- Call (650) 723-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Chang'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. Roger Christopher Chang is an epilepsy physician in Stanford, California
Dr. Chang practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University.
Dr. Chang's NPI, 1679035216, was assigned on April 2, 2019. Dr. Chang graduated from UCSF School of Medicine in 2017. Dr. Chang holds California license A186929.
NPI and contact details
- NPI
- 1679035216NPI Registry (opens in a new tab)
- NPI enumeration date
- April 2, 2019
- NPI status
- Active
- Practice phone
- (650) 723-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 33
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Roger Christopher Chang practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California
Dr. Chang's primary practice is Stanford Hospital at 300 Pasteur Drive, at 300 Pasteur Drive, Stanford, CA 94305 in Santa Clara County. The practice phone is (650) 723-4000.
- Stanford Hospital at 300 Pasteur Drive300 Pasteur Drive, Stanford, CA 94305 · Santa Clara CountyPhone(650) 723-4000
Source: Dmand AI Affiliation Data
Dr. Roger Christopher Chang is affiliated with 3 sites of care and 1 medical group
Dr. Chang's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. The medical group on file is Stanford Health Care. Dmand AI also links Dr. Chang to 1 more hospital and 1 group practice or clinic, each named with a free account. Dr. Chang's employer is on file too: a hospital.
Stanford Health Care1 hospitalName with a free account1 group practice or clinicName with a free accountEmployer: hospitalName with a free account
See all 4 affiliations for Dr. ChangSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Roger Christopher Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Stanford Hospital at 300 Pasteur Drive | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every hospital where Dr. Chang practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across Stanford University and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Roger Christopher Chang is one of 49 epilepsy physicians in California
Epilepsy is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 2084E0001X. Dr. Chang is board certified in epilepsy by the American Board of Psychiatry and Neurology. Dmand AI has Dr. Chang's licenses on file in 2 states: California and Washington.
Specialties and state licenses
- Epilepsy, CaliforniaPrimary
- Washington license
Epilepsy physicians near Dr. Chang
Counts of epilepsy physicians with a Dmand AI profile, by place and practice. Each opens the list.
49epilepsy physicians in California12epilepsy physicians in Stanford11epilepsy physicians at Stanford Hospital at 300 Pasteur Drive
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Roger Christopher Chang treated 18 Medicare patients in 2024, average age 65
CMS counts 18 Medicare patients who saw Dr. Chang in 2024. The largest group is 85 and over, with 0 patients. 67% of them have high blood pressure, and 67% have high cholesterol. Their average risk score is 1.69, 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. Chang's median patient age at 38, with 48% women.
Medicare patients, 202418
Average age65
Average risk score1.69
Dr. Chang's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Chang's Medicare patients, 2024
- High blood pressure67%
- High cholesterol67%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 38
Patient panel by sex, all payers
- Women48%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Roger Christopher Chang wrote 35 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 35 Medicare Part D claims for 13 patients. 83% of them were for generic drugs.
Part D claims, 202435
Part D patients13
Dr. Chang's Part D claims by kind of drug, 2024
- Generic29 claims83%
- Brand-name and other6 claims17%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Roger Christopher Chang scored 89 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Dr. Chang for performance year 2024, reported as part of a group.
Dr. Chang's MIPS scores, performance year 2024
- 89of 100Final score
- 87.1of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 70of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
For MedTech and pharma teams
Find epilepsy physicians like Dr. Chang by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Roger Christopher Chang has 9 publications on record
Dmand AI links 9 papers to Dr. Chang, published from 2009 to 2018. The most frequent topics are Sinoatrial Node, Action Potentials and Cardiac Pacing, Artificial. Dr. Chang's most frequent co-authors are Roger S. Chang, MD, Robert H. Edwards, MD and William J. Hucker, MD, PhD.
Papers9
Years published2009 to 2018
Dr. Chang's papers by year, 2009 to 2018
Topics Dr. Chang writes about most
- Sinoatrial Node
- Action Potentials
- Cardiac Pacing, Artificial
- Dogs
- Glutamic Acid
- Heart Atria
- Synaptic Vesicles
- Vesicular Glutamate Transport Proteins
Dr. Chang's most frequent co-authors
- Roger S. Chang, MD8 shared papers
- Robert H. Edwards, MD3 shared papers
- William J. Hucker, MD, PhD2 shared papers
Recent publications by Dr. Chang
Allosteric RegulationBiological TransportGlutamic Acid
Adenosine A2 Receptor AntagonistsDisease Models, AnimalElectrocardiography
Am J Physiol Heart Circ Physiol
Arrhythmias, CardiacAtrial FunctionAutonomic Nervous System
J Mol Cell Cardiol
Action PotentialsArrhythmias, CardiacCoronary Vessels
See who Dr. Chang researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chang works with, so you can find a warm path to the right epilepsy physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Roger Christopher Chang received $1,856 in industry payments from 2023 to 2025
CMS Open Payments shows 15 general payments to Dr. Chang from 5 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 61% of the total. Neuropace, Inc. paid the most, $1,049.
General payments to Dr. Chang by program year, 2023 to 2025
General payments to Dr. Chang by kind, 2023 to 2025
$1.9Kin total
- Food and beverage$1,14061%
- Travel and lodging$71639%
Companies that paid Dr. Chang the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Roger Christopher Chang graduated from UCSF School of Medicine
Dr. Chang graduated from UCSF School of Medicine in 2017.
- Medical school
- Board certified in epilepsy
- Board certified in neurology
Source: Dmand AI Professional Profile Data
Dr. Roger Christopher Chang accepts plans from 5 insurance carriers
Dr. Chang is in network with 5 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- CMS Medicare
Plan types Dr. Chang accepts, by number of carriers
- Medicare4
- PPO4
- HMO2
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Roger Christopher Chang'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 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 (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Clinician Public Reporting: Overall MIPS Performance (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) |
| 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. Roger Christopher Chang
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. Roger Christopher Chang's NPI number?
Dr. Roger Christopher Chang's NPI number is 1679035216. It was assigned on April 2, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Roger Christopher Chang?
Dr. Roger Christopher Chang is an epilepsy physician in Stanford, California. The primary specialty in the NPI Registry is Epilepsy Physician (taxonomy code 2084E0001X).
Where does Dr. Roger Christopher Chang practice?
Dr. Chang practices at 300 Pasteur Drive, Stanford, CA 94305. Dr. Chang's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. Dmand AI also links Dr. Chang to 1 hospital and 1 group practice or clinic.
What is Dr. Roger Christopher Chang's office phone number?
The practice phone on file for Dr. Chang is (650) 723-4000.
What is Dr. Roger Christopher Chang's medical license number?
Dr. Chang holds California license A186929, one of the licenses on file in 2 states.
Which states has Dr. Roger Christopher Chang been licensed in?
Dmand AI has state licenses on file for Dr. Chang in California and Washington (2019 to 2023).
Which hospitals is Dr. Roger Christopher Chang affiliated with?
Dr. Chang practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California. Dmand AI links Dr. Chang to 1 more hospital.
What medical group is Dr. Roger Christopher Chang part of?
Dr. Chang is linked to Stanford Health Care.
What is Dr. Roger Christopher Chang's MIPS score?
Dr. Chang's MIPS final score for performance year 2024 is 89 out of 100, reported as part of a group.
How many Medicare patients does Dr. Roger Christopher Chang see?
CMS counts 18 Medicare patients who saw Dr. Chang in 2024, with an average age of 65.
Show 7 more questionsShow fewer questions
Is Dr. Roger Christopher Chang board certified?
Yes. Dr. Chang is board certified in epilepsy by the American Board of Psychiatry and Neurology.
Where did Dr. Roger Christopher Chang go to medical school?
Dr. Chang graduated from UCSF School of Medicine in 2017.
Has Dr. Roger Christopher Chang received payments from drug or device companies?
CMS Open Payments shows $1,856 in general payments to Dr. Chang from 5 companies from 2023 to 2025. The largest total came from Neuropace, Inc.
How long has Dr. Roger Christopher Chang been practicing?
Dr. Chang graduated from medical school in 2017, 9 years ago.
Does Dr. Roger Christopher Chang do research?
Dmand AI links 9 publications to Dr. Chang, published from 2009 to 2018.
Who does Dr. Roger Christopher Chang publish with?
Dr. Chang's most frequent co-authors are Roger S. Chang, MD (8 shared papers), Robert H. Edwards, MD (3 shared papers) and William J. Hucker, MD, PhD (2 shared papers).
What insurance does Dr. Roger Christopher Chang accept?
Dr. Chang is in network with 5 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.
Selling to epilepsy practices?
See epilepsy physicians in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card