Dr. Darren C. Tsang, MD, MPH
- Part D claims, 2024
- 14
- Publications
- 17
- Industry payments
- $487
- State license
- 1
- Year NPI issued
- 2020
- Practice address
- 1100 E Norris Dr, Ottawa, IL 61350
- Practice phone
- Call (815) 433-3100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
OSF St Elizabeth Medical Center
Ottawa, Illinois
Find Dr. Tsang'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. Darren C. Tsang is a cardiologist in Ottawa, Illinois
Dr. Tsang practices at OSF St Elizabeth Medical Center in Ottawa, Illinois.
Dr. Tsang's NPI, 1053948711, was assigned on March 24, 2020. Dr. Tsang holds Illinois license 036.164888.
- NPI
- 1053948711NPI Registry (opens in a new tab)
- NPI enumeration date
- March 24, 2020
- NPI status
- Active
- Practice phone
- (815) 433-3100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Darren C. Tsang practices at OSF St Elizabeth Medical Center in Ottawa, Illinois
Dr. Tsang's primary practice is OSF St Elizabeth Medical Center, at 1100 E Norris Dr, Ottawa, IL 61350 in La Salle County. The practice phone is (815) 433-3100.
- OSF St Elizabeth Medical Center1100 E Norris Dr, Ottawa, IL 61350 · La Salle CountyPhone(815) 433-3100
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Darren C. Tsang is affiliated with 1 site of care
Dr. Tsang's primary practice is OSF St Elizabeth Medical Center in Ottawa, Illinois.
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Darren C. Tsang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tsang practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| OSF St Elizabeth Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Darren C. Tsang is one of 908 cardiologists in Illinois
Cardiovascular disease is Dr. Tsang's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Tsang is licensed in Illinois.
Specialties and state licenses
- Cardiovascular disease, IllinoisPrimary
Cardiologists near Dr. Tsang
Counts of cardiologists 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. Darren C. Tsang's patients have a median age of 71
Across all payers, Dmand AI patient panel data puts Dr. Tsang's median patient age at 71, with 100% women.
Dr. Tsang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women100%
- Men0%
Source: Dmand AI Patient Panel Data
Dr. Darren C. Tsang wrote 14 Medicare Part D claims in 2024
In 2024, Dr. Tsang wrote 14 Medicare Part D claims. 100% of them were for generic drugs.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Darren C. Tsang has 17 publications on record
Dmand AI links 17 papers to Dr. Tsang, published from 2017 to 2024. 2019 was the busiest year, with 5. The most frequent topics are Device Removal, Endovascular Procedures and Skin Neoplasms. Dr. Tsang has published most often in BMJ Case Rep. Dr. Tsang's most frequent co-authors are Ryan Azarrafiy, MD, MPH, Keyvan Nouri, MD and Ali Rajabi-Estarabadi, MD.
Dr. Tsang's papers by year, 2017 to 2024
Topics Dr. Tsang writes about most
- Device Removal
- Endovascular Procedures
- Skin Neoplasms
- Defibrillators, Implantable
Dr. Tsang's most frequent co-authors
- Ryan Azarrafiy, MD, MPH3 shared papers
- Keyvan Nouri, MD3 shared papers
- Ali Rajabi-Estarabadi, MD3 shared papers
Recent publications by Dr. Tsang
J Eur Acad Dermatol Venereol
Heart Lung
See who Dr. Tsang researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Tsang works with, so you can find a warm path to the right cardiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Darren C. Tsang received $487 in industry payments from 2023 to 2025
CMS Open Payments shows 11 general payments to Dr. Tsang from 8 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 100% of the total. Abbott Laboratories paid the most, $179.
General payments to Dr. Tsang by program year, 2023 to 2025
Companies that paid Dr. Tsang the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Darren C. Tsang'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 Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (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) |
| 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. Darren C. Tsang
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. Darren C. Tsang's NPI number?
Dr. Darren C. Tsang's NPI number is 1053948711. It was assigned on March 24, 2020, and it is active in the NPI Registry.
What kind of doctor is Dr. Darren C. Tsang?
Dr. Darren C. Tsang is a cardiologist in Ottawa, Illinois. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Darren C. Tsang practice?
Dr. Tsang practices at 1100 E Norris Dr, Ottawa, IL 61350. Dr. Tsang's primary practice is OSF St Elizabeth Medical Center in Ottawa, Illinois.
What is Dr. Darren C. Tsang's office phone number?
The practice phone on file for Dr. Tsang is (815) 433-3100.
What is Dr. Darren C. Tsang's medical license number?
Dr. Tsang holds Illinois license 036.164888.
Has Dr. Darren C. Tsang received payments from drug or device companies?
CMS Open Payments shows $487 in general payments to Dr. Tsang from 8 companies from 2023 to 2025. The largest total came from Abbott Laboratories.
How long has Dr. Darren C. Tsang been practicing?
Dr. Tsang's NPI was assigned in 2020.
Does Dr. Darren C. Tsang do research?
Dmand AI links 17 publications to Dr. Tsang, published from 2017 to 2024.
Who does Dr. Darren C. Tsang publish with?
Dr. Tsang's most frequent co-authors are Ryan Azarrafiy, MD, MPH (3 shared papers), Keyvan Nouri, MD (3 shared papers) and Ali Rajabi-Estarabadi, MD (3 shared papers).
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