Dr. Jiayan Chen, MD, PhD
- Medicare services, 2024
- 481
- Medicare patients, 2024
- 162
- Part D claims, 2024
- 186
- Publications
- 6
- Hospital affiliations
- 2
- Practice address
- 7601 Osler Drive, Towson, MD 21204
- Practice phone
- Call (410) 337-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
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. Jiayan Chen is an internist in Towson, Maryland
Dr. Chen practices at University of Maryland St. Joseph Medical Center in Towson, Maryland, part of University of Maryland Medical System.
Dr. Chen's NPI, 1659665321, was assigned on May 31, 2011. Dr. Chen holds Maryland license D0079137.
- NPI
- 1659665321NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0749431674
- NPI enumeration date
- May 31, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (410) 337-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jiayan Chen practices at University of Maryland St. Joseph Medical Center in Towson, Maryland
Dr. Chen's primary practice is University of Maryland St. Joseph Medical Center, at 7601 Osler Drive, Towson, MD 21204 in Baltimore County. The practice phone is (410) 337-1000.
- University of Maryland St. Joseph Medical Center7601 Osler Drive, Towson, MD 21204 · Baltimore CountyPhone(410) 337-1000
Source: Dmand AI Affiliation Data
Dr. Jiayan Chen is affiliated with 2 sites of care and 3 medical groups
Dr. Chen's primary practice is University of Maryland St. Joseph Medical Center in Towson, Maryland, part of University of Maryland Medical System. Dr. Chen is also affiliated with University of Maryland Baltimore Washington Medical Center. The medical group on file is Mid-Atlantic Permanente Medical Group. Dmand AI also links Dr. Chen to 2 more medical groups, 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. Jiayan Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University of Maryland St. Joseph Medical Center | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jiayan Chen is one of 3,320 internists in Maryland
Internal medicine is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Chen is licensed in Maryland.
Specialties and state licenses
- Internal medicine, MarylandPrimary
Internists near Dr. Chen
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. Jiayan Chen billed Medicare for 481 services in 2024
CMS data shows 481 Medicare services from Dr. Chen across 3 procedure codes in 2024, for 162 Medicare patients. Medicare paid $42,296 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,3992024: 48166%
Dr. Chen compared with the Maryland median for internists, 2024
- Dr. Chen
- Maryland median
- Medicare services
- 481vs 65627% below
- Medicare patients
- 162vs 25135% below
- Part D claims
- 17vs 30994% below
Medians across 3,215 internists in Maryland 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 internists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jiayan Chen treated 162 Medicare patients in 2024, average age 74
CMS counts 162 Medicare patients who saw Dr. Chen in 2024. The largest group is 75 to 84, with 62 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 28% are also on Medicaid. Their average risk score is 3.41, 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 68, with 52% women.
Dr. Chen's Medicare patients by age, 2024
Dr. Chen's Medicare patients by sex, 2024
- Women7748%
- Men8552%
Chronic conditions among Dr. Chen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Heart failure59%
- Mood disorders59%
- Diabetes55%
- Ischemic heart disease55%
- Arthritis53%
- Chronic kidney disease53%
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 68
Patient panel by sex, all payers
- Women52%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jiayan Chen wrote 186 Medicare Part D claims in 2024
In 2024, Dr. Chen wrote 186 Medicare Part D claims for 99 patients. 90% of them were for generic drugs. CMS names the drug for 17 of them, across 1 drug with 11 or more claims each, at $192 in total drug cost. In 2019, CMS named 17 claims across 1 drug.
Dr. Chen's Part D claims by kind of drug, 2024
- Generic167 claims90%
- Brand-name19 claims10%
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
- Opioids6%11 of 186 claims
- Antibiotics23%42 of 186 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, 2019 to 2024
- 2019
- 2024
- Claims for drugs CMS names
- 2019: 172024: 17No change
Drugs named by CMS: 1 in 2024, 1 in 2019.
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. Jiayan 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. Jiayan Chen has 6 publications on record
Dmand AI links 6 papers to Dr. Chen, published from 2022 to 2025. 2022 was the busiest year, with 2. The most frequent topics are GTP-Binding Proteins.
Dr. Chen's papers by year, 2022 to 2025
Topics Dr. Chen writes about most
- GTP-Binding Proteins
Recent publications by Dr. Chen
Chin Med J (Engl)
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 internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Jiayan Chen received $106 in industry payments from 2017 to 2019
CMS Open Payments shows 7 general payments to Dr. Chen from 3 drug and device companies from 2017 to 2019. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $58.
General payments to Dr. Chen by program year, 2017 to 2019
Companies that paid Dr. Chen the most, 2017 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Jiayan 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 | 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) |
| 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. Jiayan 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. Jiayan Chen's NPI number?
Dr. Jiayan Chen's NPI number is 1659665321. It was assigned on May 31, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Jiayan Chen?
Dr. Jiayan Chen is an internist in Towson, Maryland. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Jiayan Chen practice?
Dr. Chen practices at 7601 Osler Drive, Towson, MD 21204. Dr. Chen's primary practice is University of Maryland St. Joseph Medical Center in Towson, Maryland, part of University of Maryland Medical System. Dmand AI also links Dr. Chen to 2 medical groups.
What is Dr. Jiayan Chen's office phone number?
The practice phone on file for Dr. Chen is (410) 337-1000.
What is Dr. Jiayan Chen's medical license number?
Dr. Chen holds Maryland license D0079137.
Which hospitals is Dr. Jiayan Chen affiliated with?
Dr. Chen practices at University of Maryland St. Joseph Medical Center in Towson, Maryland. Dr. Chen is also affiliated with University of Maryland Baltimore Washington Medical Center.
What medical group is Dr. Jiayan Chen part of?
Dr. Chen is linked to Mid-Atlantic Permanente Medical Group. Dmand AI links Dr. Chen to 2 more medical groups.
Does Dr. Jiayan Chen accept Medicare?
Yes. CMS data shows Dr. Chen billed Medicare for 481 services in 2024, and Dr. Chen accepts Medicare assignment.
How many Medicare patients does Dr. Jiayan Chen see?
CMS counts 162 Medicare patients who saw Dr. Chen in 2024, with an average age of 74.
What services does Dr. Jiayan Chen bill to Medicare?
In 2024, Dr. Chen's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99239) and hospital inpatient care (99232).
Show 4 more questionsShow fewer questions
What drugs does Dr. Jiayan Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Amoxicillin-Clavulanate Potass.
Has Dr. Jiayan Chen received payments from drug or device companies?
CMS Open Payments shows $106 in general payments to Dr. Chen from 3 companies from 2017 to 2019. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Jiayan Chen been practicing?
Dr. Chen graduated from medical school in 1998, 28 years ago.
Does Dr. Jiayan Chen do research?
Dmand AI links 6 publications to Dr. Chen, published from 2022 to 2025.
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