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Dr. Liying Chen, MD
NPI1124275813PAC ID7416015433
- Medicare services, 2024
- 1,282
- Medicare patients, 2024
- 368
- Part D claims, 2024
- 4,264
- Publications
- 16
- Hospital affiliations
- 4
- Practice address
- 1000 N.Village Ave., Rockville Centre, NY 11570
- Practice phone
- Call (516) 705-2216
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mercy Medical Center - Unit
Acute Care Hospital-Unit · Rockville Centre, New York
Find Dr. Chen's professional email, personal email and mobile number
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Dr. Liying Chen is a hospitalist in Rockville Centre, New York
Dr. Chen practices at Mercy Medical Center - Unit in Rockville Centre, New York.
Dr. Chen's NPI, 1124275813, was assigned on August 25, 2008. Dr. Chen graduated from Shanghai Medical University in 1988. Dr. Chen holds New York license 249635.
NPI and contact details
- NPI
- 1124275813NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7416015433
- NPI enumeration date
- August 25, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (516) 705-2216
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Liying Chen practices at Mercy Medical Center - Unit in Rockville Centre, New York
Dr. Chen's primary practice is Mercy Medical Center - Unit, at 1000 N.Village Ave., Rockville Centre, NY 11570 in Nassau County. The practice phone is (516) 705-2216.
- Mercy Medical Center - Unit1000 N.Village Ave., Rockville Centre, NY 11570 · Nassau CountyPhone(516) 705-2216
Source: Dmand AI Affiliation Data
Dr. Liying Chen is affiliated with 4 sites of care and 2 medical groups
Dr. Chen's primary practice is Mercy Medical Center - Unit in Rockville Centre, New York. Dr. Chen is also affiliated with Mercy Hospital. The medical group on file is Mount Sinai South Nassau. Dmand AI also links Dr. Chen to 2 more hospitals and 1 medical group, each named with a free account.
Mercy Medical Center - UnitPrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Liying Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercy Medical Center - Unit | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Liying Chen is one of 1,796 hospitalists in New York
Hospitalist is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Chen is licensed in New York.
Specialties and state licenses
- Hospitalist, New YorkPrimary
Hospitalists near Dr. Chen
Counts of hospitalists with a Dmand AI profile, by place and practice. Each opens the list.
1,796hospitalists in New York
4hospitalists in Rockville Centre
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Liying Chen billed Medicare for 1,282 services in 2024
CMS data shows 1,282 Medicare services from Dr. Chen across 8 procedure codes in 2024, for 368 Medicare patients. Medicare paid $96,299 for them.
Medicare services, 20241,282
Medicare patients368
Paid by Medicare$96,299
Procedure codes8
Dr. Chen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,9292024: 1,28234%
Where Dr. Chen's Medicare services took place, 2024
- In an office887%
- In a facility1,19493%
Dr. Chen compared with the New York median for hospitalists, 2024
- Dr. Chen
- New York median
- Medicare services
- 1,282vs 3883.3 times
- Medicare patients
- 368vs 1632.3 times
- Part D claims
- 3,748vs 5568.1 times
Medians across 1,696 hospitalists in New York 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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Liying Chen treated 368 Medicare patients in 2024, average age 79
CMS counts 368 Medicare patients who saw Dr. Chen in 2024. The largest group is 85 and over, with 122 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 51% are also on Medicaid. Their average risk score is 2.84, 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 78, with 56% women.
Medicare patients, 2024368
Average age79
Average risk score2.84
Also on Medicaid51%
Dr. Chen's Medicare patients by age, 2024
Dr. Chen's Medicare patients by sex, 2024
- Women21859%
- Men15041%
Chronic conditions among Dr. Chen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes67%
- Arthritis61%
- Chronic kidney disease57%
- Ischemic heart disease55%
- Heart failure52%
- Mood disorders51%
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 78
Patient panel by sex, all payers
- Women56%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Liying Chen wrote 4,264 Medicare Part D claims in 2024
In 2024, Dr. Chen wrote 4,264 Medicare Part D claims for 240 patients. 84% of them were for generic drugs. CMS names the drug for 3,748 of them, across 100 drugs with 11 or more claims each, at $179,689 in total drug cost. In 2023, CMS named 4,821 claims across 119 drugs.
Part D claims, 20244,264
Drugs named by CMS100
Total drug cost$179,689
Part D patients240
Dr. Chen's Part D claims by kind of drug, 2024
- Generic3,581 claims84%
- Brand-name628 claims15%
- Other55 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
- Opioids2%64 of 4,264 claims
- Antibiotics3%146 of 4,264 claims
- Antipsychotics, patients 65 and over1%47 of 4,264 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: 4,8212024: 3,74822%
Drugs named by CMS: 100 in 2024, 119 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. Liying 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. Liying Chen has 16 publications on record
Dmand AI links 16 papers to Dr. Chen, published from 2014 to 2025. 2024 was the busiest year, with 3. The most frequent topics are Buprenorphine, Opioid-Related Disorders and Analgesics, Opioid. Dr. Chen's most frequent co-authors are James Elliott Bradner, MD, Pooja Aggarwal Lagisetty, MD and Kathrin Maria Bernt, MD.
Papers16
Years published2014 to 2025
Dr. Chen's papers by year, 2014 to 2025
Topics Dr. Chen writes about most
- Buprenorphine
- Opioid-Related Disorders
- Analgesics, Opioid
- Black or African American
- Health Knowledge, Attitudes, Practice
- Hispanic or Latino
- Methadone
- Naltrexone
Dr. Chen's most frequent co-authors
- James Elliott Bradner, MD2 shared papers
- Pooja Aggarwal Lagisetty, MD2 shared papers
- Kathrin Maria Bernt, MD1 shared paper
Recent publications by Dr. Chen
Subst Use Addctn J
Black or African AmericanBuprenorphineHealth Knowledge, Attitudes, Practice
J Subst Use Addict Treat
Analgesics, OpioidBlack or African AmericanBuprenorphine
Prescriptions for Buprenorphine in Michigan Following an Education Intervention (opens in a new tab)
JAMA Netw Open
Analgesics, OpioidBuprenorphineMichigan
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 hospitalists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Liying Chen received $450 in industry payments from 2018 to 2022
CMS Open Payments shows 6 general payments to Dr. Chen from 5 drug and device companies from 2018 to 2022. Food and beverage make up the largest share, 100% of the total. ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) paid the most, $135.
General payments to Dr. Chen by program year, 2018 to 2022
Companies that paid Dr. Chen the most, 2018 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Liying Chen graduated from Shanghai Medical University
Dr. Chen graduated from Shanghai Medical University in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Liying 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 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) |
| 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. Liying 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. Liying Chen's NPI number?
Dr. Liying Chen's NPI number is 1124275813. It was assigned on August 25, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Liying Chen?
Dr. Liying Chen is a hospitalist in Rockville Centre, New York. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Liying Chen practice?
Dr. Chen practices at 1000 N.Village Ave., Rockville Centre, NY 11570. Dr. Chen's primary practice is Mercy Medical Center - Unit in Rockville Centre, New York. Dmand AI also links Dr. Chen to 2 hospitals and 1 medical group.
What is Dr. Liying Chen's office phone number?
The practice phone on file for Dr. Chen is (516) 705-2216.
What is Dr. Liying Chen's medical license number?
Dr. Chen holds New York license 249635.
Which hospitals is Dr. Liying Chen affiliated with?
Dr. Chen is affiliated with Mercy Hospital. Dmand AI links Dr. Chen to 3 more hospitals.
What medical group is Dr. Liying Chen part of?
Dr. Chen is linked to Mount Sinai South Nassau. Dmand AI links Dr. Chen to 1 more medical group.
Does Dr. Liying Chen accept Medicare?
Yes. CMS data shows Dr. Chen billed Medicare for 1,282 services in 2024, and Dr. Chen accepts Medicare assignment.
How many Medicare patients does Dr. Liying Chen see?
CMS counts 368 Medicare patients who saw Dr. Chen in 2024, with an average age of 79.
What services does Dr. Liying Chen bill to Medicare?
In 2024, Dr. Chen's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99239) and home visit (99347).
Show 6 more questionsShow fewer questions
Where did Dr. Liying Chen go to medical school?
Dr. Chen graduated from Shanghai Medical University in 1988.
What drugs does Dr. Liying Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Atorvastatin Calcium, Gabapentin and Famotidine.
Has Dr. Liying Chen received payments from drug or device companies?
CMS Open Payments shows $450 in general payments to Dr. Chen from 5 companies from 2018 to 2022. The largest total came from ZOLL Services LLC (A/K/A ZOLL LifeCor Corp).
How long has Dr. Liying Chen been practicing?
Dr. Chen graduated from medical school in 1988, 38 years ago.
Does Dr. Liying Chen do research?
Dmand AI links 16 publications to Dr. Chen, published from 2014 to 2025.
Who does Dr. Liying Chen publish with?
Dr. Chen's most frequent co-authors are James Elliott Bradner, MD (2 shared papers), Pooja Aggarwal Lagisetty, MD (2 shared papers) and Kathrin Maria Bernt, MD (1 shared paper).
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