Int J Radiat Oncol Biol Phys
B7-H1 AntigenCarcinoma, Lewis LungCell Line, Tumor
Dr. Benjamin Chen, MD
NPI1336377530PAC ID8426186164
- Medicare patients, 2026
- 12
- Part D claims, 2026
- 82
- Publications
- 2
- Hospital affiliations
- 1
- Industry payments
- $3,838
- Practice address
- 9400 Rosecrans Avenue, Bellflower, CA 90706
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD
Acute Care Hospital outpatient department · Bellflower, 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. Benjamin Chen is a general surgeon in Bellflower, California
Dr. Chen practices at Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California.
Dr. Chen's NPI, 1336377530, was assigned on June 25, 2009. Dr. Chen graduated from New York Medical College in 2005. Dr. Chen holds California license A97617.
NPI and contact details
- NPI
- 1336377530NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426186164
- NPI enumeration date
- June 25, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Benjamin Chen practices at Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California
Dr. Chen's primary practice is Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD, at 9400 Rosecrans Avenue, Bellflower, CA 90706.
- Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD9400 Rosecrans Avenue, Bellflower, CA 90706
Source: Dmand AI Affiliation Data
Dr. Benjamin Chen is affiliated with 5 sites of care and 2 medical groups
Dr. Chen's primary practice is Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California. Dr. Chen is also affiliated with Downey Medical Center. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Chen to 2 more group practices and clinics, 1 breast imaging center and 1 medical group, each named with a free account. Dr. Chen's employer is on file too: a hospital.
Kaiser Permanente Medical Group Bellflower Medical Offices - HOPDPrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Benjamin 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 |
|---|---|
| Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Benjamin Chen is one of 2,926 general surgeons in California
Surgery is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Chen is board certified in surgery by the American Board of Surgery. Dr. Chen is licensed in California.
Specialties and state licenses
- Surgery, CaliforniaPrimary
Clinical focus
Dmand AI lists mastectomy among the conditions Dr. Chen treats.
General surgeons near Dr. Chen
Counts of general surgeons 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. Benjamin Chen treated 12 Medicare patients in 2026, average age 67
CMS counts 12 Medicare patients who saw Dr. Chen in 2026. The largest group is 85 and over, with 0 patients. Their average risk score is 3.08, 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 52, with 66% women.
Medicare patients, 202612
Average age67
Average risk score3.08
Dr. Chen's Medicare patients by age, 2026
CMS leaves out age groups with fewer than 11 patients.
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 52
Patient panel by sex, all payers
- Women66%
- Men34%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2026 data
Dr. Benjamin Chen wrote 82 Medicare Part D claims in 2026
In 2026, Dr. Chen wrote 82 Medicare Part D claims for 59 patients. 98% of them were for generic drugs. CMS names the drug for 48 of them, across 2 drugs with 11 or more claims each, at $386 in total drug cost. In 2023, CMS named 50 claims across 2 drugs.
Part D claims, 202682
Drugs named by CMS2
Total drug cost$386
Part D patients59
Dr. Chen's Part D claims by kind of drug, 2026
- Generic80 claims98%
- Brand-name and other2 claims2%
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, 2026
- Opioids59%48 of 82 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: 502024: 484%
Drugs named by CMS: 2 in 2024, 2 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), 2026 data
How Dr. Benjamin Chen takes part in Medicare
Dr. Chen accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Benjamin Chen has 2 publications on record
Dmand AI links 2 papers to Dr. Chen in 2021. Dr. Chen's most frequent co-authors are Robert Dale Timmerman, MD, Todd A. Aguilera, MD, PhD and Yang-Xin Fu, MD.
Papers2
Dr. Chen's most frequent co-authors
- Robert Dale Timmerman, MD2 shared papers
- Todd A. Aguilera, MD, PhD1 shared paper
- Yang-Xin Fu, 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 general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Benjamin Chen received $3,838 in industry payments from 2017 to 2025
CMS Open Payments shows 11 general payments to Dr. Chen from 4 drug and device companies from 2017 to 2025. Education make up the largest share, 65% of the total. Intuitive Surgical, Inc. paid the most, $3,643.
General payments to Dr. Chen by program year, 2017 to 2025
General payments to Dr. Chen by kind, 2017 to 2025
$3.8Kin total
- Education$2,50065%
- Travel and lodging$1,06228%
- Food and beverage$2777%
Companies that paid Dr. Chen the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Benjamin Chen graduated from New York Medical College
Dr. Chen graduated from New York Medical College in 2005.
- Medical school
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. Benjamin Chen accepts plans from 2 insurance carriers
Dr. Chen is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Chen accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Benjamin 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 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)Doctors and Clinicians Utilization Data (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. Benjamin 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. Benjamin Chen's NPI number?
Dr. Benjamin Chen's NPI number is 1336377530. It was assigned on June 25, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Benjamin Chen?
Dr. Benjamin Chen is a general surgeon in Bellflower, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Benjamin Chen practice?
Dr. Chen practices at 9400 Rosecrans Avenue, Bellflower, CA 90706. Dr. Chen's primary practice is Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California. Dmand AI also links Dr. Chen to 2 group practices and clinics, 1 breast imaging center and 1 medical group, and a free account names each one.
What is Dr. Benjamin Chen's email address?
Dmand AI checks professional and personal email addresses for Dr. Chen through healthcare-specific waterfall enrichment. They are available with a free Dmand AI account.
What is Dr. Benjamin Chen's medical license number?
Dr. Chen holds California license A97617.
Which hospitals is Dr. Benjamin Chen affiliated with?
Dr. Chen is affiliated with Downey Medical Center.
What medical group is Dr. Benjamin Chen part of?
Dr. Chen is linked to Southern California Permanente Medical Group. Dmand AI links Dr. Chen to 1 more medical group, named with a free account.
Who employs Dr. Benjamin Chen?
Dmand AI has Dr. Chen's employer on file: a hospital. The organization's name is available with a free Dmand AI account.
Who does Dr. Benjamin Chen practice with?
Dmand AI links 17,030 HCPs to Dr. Chen's primary medical group, 280 of them general surgeons. A free account lists them, with verified contacts.
Does Dr. Benjamin Chen accept Medicare?
Yes. CMS lists Dr. Chen as accepting Medicare assignment.
Show 10 more questionsShow fewer questions
How many Medicare patients does Dr. Benjamin Chen see?
CMS counts 12 Medicare patients who saw Dr. Chen in 2026, with an average age of 67.
Is Dr. Benjamin Chen board certified?
Yes. Dr. Chen is board certified in surgery by the American Board of Surgery.
Where did Dr. Benjamin Chen go to medical school?
Dr. Chen graduated from New York Medical College in 2005.
What drugs does Dr. Benjamin Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Tramadol HCl and Hydrocodone-Acetaminophen.
Has Dr. Benjamin Chen received payments from drug or device companies?
CMS Open Payments shows $3,838 in general payments to Dr. Chen from 4 companies from 2017 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Benjamin Chen been practicing?
Dr. Chen graduated from medical school in 2005, 21 years ago.
Does Dr. Benjamin Chen do research?
Dmand AI links 2 publications to Dr. Chen.
Who does Dr. Benjamin Chen publish with?
Dr. Chen's most frequent co-authors are Robert Dale Timmerman, MD (2 shared papers), Todd A. Aguilera, MD, PhD (1 shared paper) and Yang-Xin Fu, MD (1 shared paper).
What EHR does Dr. Benjamin Chen's practice use?
Dmand AI tracks the EHR system at Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD and at 4 more sites and 1 medical group. The vendor and product are available with a free Dmand AI account.
What insurance does Dr. Benjamin Chen accept?
Dr. Chen is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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