Dr. Lillian Chen, MD
- Medicare services, 2024
- 1,680
- Medicare patients, 2024
- 457
- Part D claims, 2024
- 3,818
- Publications
- 3
- Hospital affiliations
- 3
- Practice address
- 1250 16th Street, Santa Monica, CA 90404
- Practice phone
- Call (310) 319-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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. Lillian Chen is an internist in Santa Monica, California
Dr. Chen practices at UCLA Santa Monica Medical Center in Santa Monica, California, part of University of California Health.
Dr. Chen's NPI, 1386919454, was assigned on March 21, 2012. Dr. Chen graduated from University of Wisconsin-Madison in 2012. Dr. Chen holds California license A128859.
- NPI
- 1386919454NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6305150848
- NPI enumeration date
- March 21, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (310) 319-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Lillian Chen practices at UCLA Santa Monica Medical Center in Santa Monica, California
Dr. Chen's primary practice is UCLA Santa Monica Medical Center, at 1250 16th Street, Santa Monica, CA 90404 in Los Angeles County. The practice phone is (310) 319-4000.
- UCLA Santa Monica Medical Center1250 16th Street, Santa Monica, CA 90404 · Los Angeles CountyPhone(310) 319-4000
Source: Dmand AI Affiliation Data
Dr. Lillian Chen is affiliated with 5 sites of care and 1 medical group
Dr. Chen's primary practice is UCLA Santa Monica Medical Center in Santa Monica, California, part of University of California Health. Dr. Chen is also affiliated with Ronald Reagan UCLA Medical Center. The medical group on file is UCLA Medical Group. Dmand AI also links Dr. Chen to 1 more hospital, 1 group practice or clinic and 1 home health agency, 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. Lillian Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCLA Santa Monica Medical Center | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Lillian Chen is one of 16,751 internists in California
Internal medicine is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Chen is board certified in internal medicine by the American Board of Internal Medicine. Dr. Chen is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, acute sinusitis, acute skin infection, adjustment disease, alzheimer's disease, aneurysm, arthritis and asthma among the conditions Dr. Chen treats.
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. Lillian Chen billed Medicare for 1,680 services in 2024
CMS data shows 1,680 Medicare services from Dr. Chen across 15 procedure codes in 2024, for 457 Medicare patients. Medicare paid $96,157 for them.
Dr. Chen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7892024: 8012%
- Other services
- 2023: 4112024: 55335%
- Tests and treatments
- 2023: 2182024: 30841%
- Surgery
- 2023: 382024: 1853%
- Lab and pathology
- 2023: 232024: 0100%
Where Dr. Chen's Medicare services took place, 2024
- In an office1,66099%
- In a facility201%
Dr. Chen compared with the California median for internists, 2024
- Dr. Chen
- California median
- Medicare services
- 1,680vs 3614.7 times
- Medicare patients
- 457vs 1513.0 times
- Part D claims
- 3,254vs 4217.7 times
Medians across 15,815 internists in California 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 California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Lillian Chen treated 457 Medicare patients in 2024, average age 75
CMS counts 457 Medicare patients who saw Dr. Chen in 2024. The largest group is 65 to 74, with 195 patients. 75% of them have high cholesterol, and 70% have high blood pressure. 14% are also on Medicaid. Their average risk score is 1.46, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chen's median patient age at 53, with 70% women.
Dr. Chen's Medicare patients by age, 2024
Dr. Chen's Medicare patients by sex, 2024
- Women31168%
- Men14632%
Chronic conditions among Dr. Chen's Medicare patients, 2024
- High cholesterol75%
- High blood pressure70%
- Arthritis44%
- Diabetes33%
- Osteoporosis30%
- Ischemic heart disease22%
- Mood disorders22%
- Chronic kidney disease21%
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 53
Patient panel by sex, all payers
- Women70%
- Men29%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Lillian Chen wrote 3,818 Medicare Part D claims in 2024
In 2024, Dr. Chen wrote 3,818 Medicare Part D claims for 437 patients. 91% of them were for generic drugs. CMS names the drug for 3,254 of them, across 70 drugs with 11 or more claims each, at $179,616 in total drug cost. In 2023, CMS named 3,281 claims across 70 drugs.
Dr. Chen's Part D claims by kind of drug, 2024
- Generic3,475 claims91%
- Brand-name329 claims9%
- Other14 claims0%
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
- Opioids0%15 of 3,818 claims
- Antibiotics3%101 of 3,818 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: 3,2812024: 3,2541%
Drugs named by CMS: 70 in 2024, 70 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
Dr. Lillian Chen offers telehealth to Medicare patients
Dr. Chen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chen as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Lillian Chen has 3 publications on record
Dmand AI links 3 papers to Dr. Chen, published from 2019 to 2024. 2024 was the busiest year, with 2. Dr. Chen's most frequent co-authors are Robert Blair Ash, MD, Tanuja A. Bhandari, MD and John Dermot Fitzgerald, MD.
Dr. Chen's most frequent co-authors
- Robert Blair Ash, MD1 shared paper
- Tanuja A. Bhandari, MD1 shared paper
- John Dermot Fitzgerald, MD1 shared paper
Recent publications by Dr. Chen
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. Lillian Chen received $265 in industry payments from 2019 to 2024
CMS Open Payments shows 6 general payments to Dr. Chen from 6 drug and device companies from 2019 to 2024. Food and beverage make up the largest share, 100% of the total. Edwards Lifesciences Corporation paid the most, $107.
General payments to Dr. Chen by program year, 2019 to 2024
Companies that paid Dr. Chen the most, 2019 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Lillian Chen graduated from University of Wisconsin-Madison
Dr. Chen graduated from University of Wisconsin-Madison in 2012.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Lillian Chen accepts plans from 14 insurance carriers
Dr. Chen is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +6 more carriersWith a free account
Plan types Dr. Chen accepts, by number of carriers
- PPO9
- HMO7
- Medicare7
- EPO4
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. Lillian 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) |
| 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. Lillian 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. Lillian Chen's NPI number?
Dr. Lillian Chen's NPI number is 1386919454. It was assigned on March 21, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Lillian Chen?
Dr. Lillian Chen is an internist in Santa Monica, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Lillian Chen practice?
Dr. Chen practices at 1250 16th Street, Santa Monica, CA 90404. Dr. Chen's primary practice is UCLA Santa Monica Medical Center in Santa Monica, California, part of University of California Health. Dmand AI also links Dr. Chen to 1 hospital, 1 group practice or clinic and 1 home health agency.
What is Dr. Lillian Chen's office phone number?
The practice phone on file for Dr. Chen is (310) 319-4000.
What is Dr. Lillian Chen's medical license number?
Dr. Chen holds California license A128859.
Which hospitals is Dr. Lillian Chen affiliated with?
Dr. Chen practices at UCLA Santa Monica Medical Center in Santa Monica, California. Dr. Chen is also affiliated with Ronald Reagan UCLA Medical Center. Dmand AI links Dr. Chen to 1 more hospital.
What medical group is Dr. Lillian Chen part of?
Dr. Chen is linked to UCLA Medical Group.
Does Dr. Lillian Chen accept Medicare?
Yes. CMS data shows Dr. Chen billed Medicare for 1,680 services in 2024, and Dr. Chen accepts Medicare assignment.
Does Dr. Lillian Chen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chen as offering telehealth services.
How many Medicare patients does Dr. Lillian Chen see?
CMS counts 457 Medicare patients who saw Dr. Chen in 2024, with an average age of 75.
Show 9 more questionsShow fewer questions
Is Dr. Lillian Chen board certified?
Yes. Dr. Chen is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Lillian Chen bill to Medicare?
In 2024, Dr. Chen's most billed Medicare services were office visit, established patient (99214), medicare service (G0439) and office visit, established patient (99215).
Where did Dr. Lillian Chen go to medical school?
Dr. Chen graduated from University of Wisconsin-Madison in 2012.
What drugs does Dr. Lillian Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Losartan Potassium.
Has Dr. Lillian Chen received payments from drug or device companies?
CMS Open Payments shows $265 in general payments to Dr. Chen from 6 companies from 2019 to 2024. The largest total came from Edwards Lifesciences Corporation.
How long has Dr. Lillian Chen been practicing?
Dr. Chen graduated from medical school in 2012, 14 years ago.
Does Dr. Lillian Chen do research?
Dmand AI links 3 publications to Dr. Chen, published from 2019 to 2024.
Who does Dr. Lillian Chen publish with?
Dr. Chen's most frequent co-authors are Robert Blair Ash, MD (1 shared paper), Tanuja A. Bhandari, MD (1 shared paper) and John Dermot Fitzgerald, MD (1 shared paper).
What insurance does Dr. Lillian Chen accept?
Dr. Chen is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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