Dr. Emy Caitlin Chen, MD
- Medicare services, 2024
- 4,947
- Medicare patients, 2024
- 374
- Part D claims, 2024
- 1,867
- MIPS score, 2024
- 75
- Hospital affiliations
- 1
- Practice address
- 1500 Duarte Rd, Duarte, CA 91010
- Practice phone
- Call (800) 826-4673
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
City of Hope Comprehensive Cancer Center - Duarte
Duarte, California
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. Emy Caitlin Chen is a rheumatologist in Duarte, California
Dr. Chen practices at City of Hope Comprehensive Cancer Center - Duarte in Duarte, California.
Dr. Chen's NPI, 1689741910, was assigned on November 30, 2006. Dr. Chen graduated from Keck School of Medicine of USC in 1998. Dr. Chen holds California license A70838.
- NPI
- 1689741910NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3375613060
- NPI enumeration date
- November 30, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (800) 826-4673
- 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 Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Emy Caitlin Chen practices at City of Hope Comprehensive Cancer Center - Duarte in Duarte, California
Dr. Chen's primary practice is City of Hope Comprehensive Cancer Center - Duarte, at 1500 Duarte Rd, Duarte, CA 91010 in Los Angeles County. The practice phone is (800) 826-4673.
- City of Hope Comprehensive Cancer Center - Duarte1500 Duarte Rd, Duarte, CA 91010 · Los Angeles CountyPhone(800) 826-4673
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Emy Caitlin Chen is affiliated with 4 sites of care and 1 medical group
Dr. Chen's primary practice is City of Hope Comprehensive Cancer Center - Duarte in Duarte, California. Dr. Chen is also affiliated with USC Arcadia Hospital. The medical group on file is City of Hope. Dmand AI also links Dr. Chen to 1 more physician office and 1 other site, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Emy Caitlin Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| City of Hope Comprehensive Cancer Center - Duarte | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Emy Caitlin Chen is one of 821 rheumatologists in California
Rheumatology is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. 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
- Rheumatology, CaliforniaPrimary
Clinical focus
Dmand AI lists arteritis, arthritis, gout, joint arthropathy, joint pain, lupus, muscle disease and muscle pain, fibromyalgia, and limb pain among the conditions Dr. Chen treats.
Rheumatologists near Dr. Chen
Counts of rheumatologists 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. Emy Caitlin Chen billed Medicare for 4,947 services in 2024
CMS data shows 4,947 Medicare services from Dr. Chen across 17 procedure codes in 2024, for 374 Medicare patients. Medicare paid $183,077 for them.
Dr. Chen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 2,8112024: 2,9926%
- Office and hospital visits
- 2023: 1,2292024: 1,1457%
- Tests and treatments
- 2023: 5572024: 5344%
- Other services
- 2023: 02024: 276
- Surgery
- 2023: 452024: 0100%
Where Dr. Chen's Medicare services took place, 2024
- In an office4,79197%
- In a facility1563%
Dr. Chen compared with the California median for rheumatologists, 2024
- Dr. Chen
- California median
- Medicare services
- 4,947vs 9005.5 times
- Medicare patients
- 374vs 21673% above
- Part D claims
- 1,469vs 96253% above
Medians across 773 rheumatologists 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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chen and other rheumatologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Emy Caitlin Chen treated 374 Medicare patients in 2024, average age 74
CMS counts 374 Medicare patients who saw Dr. Chen in 2024. The largest group is 65 to 74, with 173 patients. 75% of them have arthritis, and 75% have high blood pressure. 29% are also on Medicaid. Their average risk score is 1.52, 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 70, with 74% women.
Dr. Chen's Medicare patients by age, 2024
Dr. Chen's Medicare patients by sex, 2024
- Women28676%
- Men8824%
Chronic conditions among Dr. Chen's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Osteoporosis41%
- Diabetes39%
- Chronic kidney disease27%
- Ischemic heart disease27%
- Cancer24%
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 70
Patient panel by sex, all payers
- Women74%
- Men24%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Emy Caitlin Chen wrote 1,867 Medicare Part D claims in 2024
In 2024, Dr. Chen wrote 1,867 Medicare Part D claims for 216 patients. 85% of them were for generic drugs. CMS names the drug for 1,469 of them, across 57 drugs with 11 or more claims each, at $668,780 in total drug cost. In 2023, CMS named 1,429 claims across 50 drugs.
Dr. Chen's Part D claims by kind of drug, 2024
- Generic1,583 claims85%
- Brand-name and other284 claims15%
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%113 of 1,867 claims
- Antibiotics3%53 of 1,867 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: 1,4292024: 1,4693%
Drugs named by CMS: 57 in 2024, 50 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. Emy Caitlin Chen scored 75 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Chen for performance year 2024, reported individually. 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
- MIPS final score, 2024
- 75 of 100
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Emy Caitlin Chen received $10,220 in industry payments from 2016 to 2025
CMS Open Payments shows 610 general payments to Dr. Chen from 25 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Pfizer Inc. paid the most, $2,729.
General payments to Dr. Chen by program year, 2016 to 2025
General payments to Dr. Chen by kind, 2016 to 2025
- Food and beverage$10,12599%
- Education$941%
Companies that paid Dr. Chen the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Emy Caitlin Chen graduated from Keck School of Medicine of USC
Dr. Chen graduated from Keck School of Medicine of USC in 1998.
- Medical school
- Board certified in internal medicine
- Board certified in rheumatology
Source: Dmand AI Professional Profile Data
Dr. Emy Caitlin Chen accepts plans from 15 insurance carriers
Dr. Chen is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Elevance
- United Healthcare
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +7 more carriersWith a free account
Plan types Dr. Chen accepts, by number of carriers
- Medicare9
- PPO9
- HMO6
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Emy Caitlin 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 | 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 DataDmand 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| 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. Emy Caitlin 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. Emy Caitlin Chen's NPI number?
Dr. Emy Caitlin Chen's NPI number is 1689741910. It was assigned on November 30, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Emy Caitlin Chen?
Dr. Emy Caitlin Chen is a rheumatologist in Duarte, California. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Emy Caitlin Chen practice?
Dr. Chen practices at 1500 Duarte Rd, Duarte, CA 91010. Dr. Chen's primary practice is City of Hope Comprehensive Cancer Center - Duarte in Duarte, California. Dmand AI also links Dr. Chen to 1 physician office and 1 other site.
What is Dr. Emy Caitlin Chen's office phone number?
The practice phone on file for Dr. Chen is (800) 826-4673.
What is Dr. Emy Caitlin Chen's medical license number?
Dr. Chen holds California license A70838.
Which hospitals is Dr. Emy Caitlin Chen affiliated with?
Dr. Chen is affiliated with USC Arcadia Hospital.
What medical group is Dr. Emy Caitlin Chen part of?
Dr. Chen is linked to City of Hope.
Does Dr. Emy Caitlin Chen accept Medicare?
Yes. CMS data shows Dr. Chen billed Medicare for 4,947 services in 2024, and Dr. Chen accepts Medicare assignment.
Does Dr. Emy Caitlin Chen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chen as offering telehealth services.
What is Dr. Emy Caitlin Chen's MIPS score?
Dr. Chen's MIPS final score for performance year 2024 is 75 out of 100, reported individually.
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. Emy Caitlin Chen see?
CMS counts 374 Medicare patients who saw Dr. Chen in 2024, with an average age of 74.
Is Dr. Emy Caitlin Chen board certified?
Yes. Dr. Chen is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Emy Caitlin Chen bill to Medicare?
In 2024, Dr. Chen's most billed Medicare services were injected or infused drug (J0897), office visit, established patient (99214) and injected or infused drug (J1010).
Where did Dr. Emy Caitlin Chen go to medical school?
Dr. Chen graduated from Keck School of Medicine of USC in 1998.
What drugs does Dr. Emy Caitlin Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Prednisone, Hydroxychloroquine Sulfate and Methotrexate.
Has Dr. Emy Caitlin Chen received payments from drug or device companies?
CMS Open Payments shows $10,220 in general payments to Dr. Chen from 25 companies from 2016 to 2025. The largest total came from Pfizer Inc.
How long has Dr. Emy Caitlin Chen been practicing?
Dr. Chen graduated from medical school in 1998, 28 years ago.
What insurance does Dr. Emy Caitlin Chen accept?
Dr. Chen is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
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