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Dr. Robert Chen, MD
NPI1083751358
- Medicare services, 2018
- 591
- Part D claims, 2018
- 11
- Publications
- 1
- Industry payments
- $175,712
- Affiliated sites
- 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 - Main Campus (Duarte)
Duarte, California
Find Dr. Chen's professional email, personal email and mobile number
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Dr. Robert Chen is a hematology (internal medicine) physician in Duarte, California
Dr. Chen practices at City of Hope - Main Campus (Duarte) in Duarte, California.
Dr. Chen's NPI, 1083751358, was assigned on January 30, 2007. Dr. Chen holds California license A104327.
NPI and contact details
- NPI
- 1083751358NPI Registry (opens in a new tab)
- NPI enumeration date
- January 30, 2007
- NPI status
- Active
- Practice phone
- (800) 826-4673
- 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. Robert Chen practices at City of Hope - Main Campus (Duarte) in Duarte, California
Dr. Chen's primary practice is City of Hope - Main Campus (Duarte), at 1500 Duarte Rd, Duarte, CA 91010 in Los Angeles County. The practice phone is (800) 826-4673.
- City of Hope - Main Campus (Duarte)1500 Duarte Rd, Duarte, CA 91010 · Los Angeles CountyPhone(800) 826-4673
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Robert Chen is affiliated with 2 sites of care and 1 medical group
Dr. Chen's primary practice is City of Hope - Main Campus (Duarte) in Duarte, California. The medical group on file is City of Hope. Dmand AI also links Dr. Chen to 1 more other site, named with a free account.
City of Hope - Main Campus (Duarte)Primary
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. Robert Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| City of Hope - Main Campus (Duarte) | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert Chen is one of 153 hematology (internal medicine) physicians in California
Internal medicine is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 207RH0000X. The record also lists hematology. Dr. Chen is licensed in California.
Specialties and state licenses
- Hematology (internal medicine), CaliforniaPrimary
Hematology (internal medicine) physicians near Dr. Chen
Counts of hematology (internal medicine) physicians with a Dmand AI profile, by place and practice. Each opens the list.
153hematology (internal medicine) physicians in California54hematology (internal medicine) physicians in Duarte
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Robert Chen billed Medicare for 591 services in 2018
CMS data shows 591 Medicare services from Dr. Chen across 4 procedure codes in 2018. Medicare paid $41,984 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2018591
Paid by Medicare$41,984
Procedure codes4
Dr. Chen's Medicare services by type, 2017 to 2018
- 2017
- 2018
- Office and hospital visits
- 2017: 8502018: 59130%
Dr. Chen compared with the California median for hematology (internal medicine) physicians, 2018
- Dr. Chen
- California median
- Medicare services
- 591vs 37358% above
- Part D claims
- 11vs 9989% below
Medians across 139 hematology (internal medicine) physicians in California with Dmand AI profiles that report each measure.
Dr. Chen's most billed Medicare procedure codes, 2018
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 hematology (internal medicine) physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert Chen's patients have a median age of 68
Across all payers, Dmand AI patient panel data puts Dr. Chen's median patient age at 68, with 38% women.
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
- Women38%
- Men63%
Source: Dmand AI Patient Panel Data
Dr. Robert Chen wrote 11 Medicare Part D claims in 2018
In 2018, Dr. Chen wrote 11 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $94,982 in total drug cost. In 2017, CMS named 23 claims across 1 drug.
Part D claims, 201811
Drugs named by CMS1
Total drug cost$94,982
Dr. Chen's most prescribed drugs by claims, 2018
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2017 to 2018
- 2017
- 2018
- Claims for drugs CMS names
- 2017: 232018: 1152%
Drugs named by CMS: 1 in 2018, 1 in 2017.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Robert Chen has 1 publication on record
Dmand AI links 1 paper to Dr. Chen in 2011. Dr. Chen's most frequent co-authors are Aileen M. Dillon, MBCHB and Nicola P. Klein, MD.
Papers1
Dr. Chen's most frequent co-authors
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 hematology (internal medicine) physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Robert Chen received $175,712 in industry payments from 2016 to 2025
CMS Open Payments shows 215 general payments to Dr. Chen from 14 drug and device companies from 2016 to 2025. Travel and lodging make up the largest share, 29% of the total. Merck Sharp & Dohme Corporation paid the most, $69,519.
General payments to Dr. Chen by program year, 2016 to 2025
General payments to Dr. Chen by kind, 2016 to 2025
$175.7Kin total
- Travel and lodging$51,75529%
- Speaker and faculty fees$50,68929%
- Consulting fees$41,50824%
- Honoraria$26,08915%
- Other$5,6713%
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
Sources for Dr. Robert 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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. Robert 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. Robert Chen's NPI number?
Dr. Robert Chen's NPI number is 1083751358. It was assigned on January 30, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert Chen?
Dr. Robert Chen is a hematology (internal medicine) physician in Duarte, California. The primary specialty in the NPI Registry is Hematology (Internal Medicine) Physician (taxonomy code 207RH0000X).
Where does Dr. Robert Chen practice?
Dr. Chen practices at 1500 Duarte Rd, Duarte, CA 91010. Dr. Chen's primary practice is City of Hope - Main Campus (Duarte) in Duarte, California. Dmand AI also links Dr. Chen to 1 other site.
What is Dr. Robert Chen's office phone number?
The practice phone on file for Dr. Chen is (800) 826-4673.
What is Dr. Robert Chen's medical license number?
Dr. Chen holds California license A104327.
What medical group is Dr. Robert Chen part of?
Dr. Chen is linked to City of Hope.
Does Dr. Robert Chen accept Medicare?
Yes. CMS data shows Dr. Chen billed Medicare for 591 services in 2018.
What services does Dr. Robert Chen bill to Medicare?
In 2018, Dr. Chen's most billed Medicare services were hospital inpatient care (99233), office visit, established patient (99214) and office visit, established patient (99213).
What drugs does Dr. Robert Chen prescribe most?
In 2018 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Revlimid.
Has Dr. Robert Chen received payments from drug or device companies?
CMS Open Payments shows $175,712 in general payments to Dr. Chen from 14 companies from 2016 to 2025. The largest total came from Merck Sharp & Dohme Corporation.
Show 3 more questionsShow fewer questions
How long has Dr. Robert Chen been practicing?
Dr. Chen's NPI was assigned in 2007.
Does Dr. Robert Chen do research?
Dmand AI links 1 publication to Dr. Chen.
Who does Dr. Robert Chen publish with?
Dr. Chen's most frequent co-authors are Aileen M. Dillon, MBCHB (1 shared paper) and Nicola P. Klein, MD (1 shared paper).
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