Dr. John Tekuang Chang, MD
- Part D claims, 2021
- 15
- Publications
- 2
- Industry payments
- $219
- State licenses
- 2
- Year NPI issued
- 2006
- Practice address
- 200 Medical Plaza, Los Angeles, CA 90095-3075
- Practice phone
- Call (310) 825-0631
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
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. John Tekuang Chang is an internist in Los Angeles, California
Dr. Chang practices in Los Angeles, California.
Dr. Chang's NPI, 1023043387, was assigned on July 12, 2006. Dr. Chang graduated from Feinberg School of Medicine in 1996. Dr. Chang's California license number on file is A69499.
- NPI
- 1023043387NPI Registry (opens in a new tab)
- NPI enumeration date
- July 12, 2006
- NPI status
- Active
- Practice phone
- (310) 825-0631
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. John Tekuang Chang's practice address is in Los Angeles, California
Dr. Chang's practice address in the NPI Registry is 200 Medical Plaza, Los Angeles, CA 90095-3075. The practice phone is (310) 825-0631.
- NPI Registry address200 Medical Plaza, Los Angeles, CA 90095-3075Phone(310) 825-0631
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. John Tekuang Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Chang's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Tekuang Chang is one of 16,751 internists in California
Internal medicine is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Chang is board certified in clinical informatics by the American Board of Preventive Medicine. Dmand AI has Dr. Chang's licenses on file in 2 states: California and Virginia.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Virginia license
Internists near Dr. Chang
Counts of internists 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. John Tekuang Chang wrote 15 Medicare Part D claims in 2021
In 2021, Dr. Chang wrote 15 Medicare Part D claims. They cover 1 drug, with $4,134 in total drug cost. In 2020, CMS named 67 claims across 5 drugs.
Dr. Chang's most prescribed drugs by claims, 2021
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, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 672021: 1578%
Drugs named by CMS: 1 in 2021, 5 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. John Tekuang Chang has 2 publications on record
Dmand AI links 2 papers to Dr. Chang, published from 2009 to 2023.
Recent publications by Dr. Chang
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 internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Tekuang Chang received $219 in industry payments from 2018 to 2025
CMS Open Payments shows 3 general payments to Dr. Chang from 3 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 100% of the total. Boston Scientific Corporation paid the most, $150.
General payments to Dr. Chang by program year, 2018 to 2025
Companies that paid Dr. Chang the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Tekuang Chang graduated from Feinberg School of Medicine
Dr. Chang graduated from Feinberg School of Medicine in 1996. Dr. Chang is a member of AcademyHealth, AAPL, ACP, AMIA and Guidelines International Network (GIN).
- Medical school
- Board certified in clinical informatics
Source: Dmand AI Professional Profile Data
Sources for Dr. John Tekuang 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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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 |
| 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 Tekuang 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. John Tekuang Chang's NPI number?
Dr. John Tekuang Chang's NPI number is 1023043387. It was assigned on July 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Tekuang Chang?
Dr. John Tekuang Chang is an internist in Los Angeles, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John Tekuang Chang practice?
Dr. Chang practices at 200 Medical Plaza, Los Angeles, CA 90095-3075.
What is Dr. John Tekuang Chang's office phone number?
The practice phone on file for Dr. Chang is (310) 825-0631.
What is Dr. John Tekuang Chang's medical license number?
Dr. Chang's California license number on file is A69499, one of the licenses on file in 2 states.
Which states has Dr. John Tekuang Chang been licensed in?
Dmand AI has state licenses on file for Dr. Chang in California (1999 to 2025) and Virginia (1998 to 2026).
Is Dr. John Tekuang Chang board certified?
Yes. Dr. Chang is board certified in clinical informatics by the American Board of Preventive Medicine.
Where did Dr. John Tekuang Chang go to medical school?
Dr. Chang graduated from Feinberg School of Medicine in 1996.
What drugs does Dr. John Tekuang Chang prescribe most?
In 2021 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Jardiance.
Has Dr. John Tekuang Chang received payments from drug or device companies?
CMS Open Payments shows $219 in general payments to Dr. Chang from 3 companies from 2018 to 2025. The largest total came from Boston Scientific Corporation.
How long has Dr. John Tekuang Chang been practicing?
Dr. Chang graduated from medical school in 1996, 30 years ago.
Does Dr. John Tekuang Chang do research?
Dmand AI links 2 publications to Dr. Chang, published from 2009 to 2023.
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