Biopsy, NeedlePredictive Value of TestsProstate
Dr. Gregory Lee Chen, MD
NPI1699853457PAC ID3476733932
- Medicare patients, 2024
- 14
- Part D claims, 2024
- 1,939
- Publications
- 4
- Industry payments
- $131
- Affiliated sites
- 1
- Practice address
- 901 Nevin Ave, Richmond, CA 94801
- Practice phone
- Call (510) 307-1555
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Richmond Medical Center
Richmond, 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. Gregory Lee Chen is a urologist in Richmond, California
Dr. Chen practices at Richmond Medical Center in Richmond, California.
Dr. Chen's NPI, 1699853457, was assigned on November 1, 2006. Dr. Chen graduated from Rush Medical College in 1992. Dr. Chen holds California license G84622.
NPI and contact details
- NPI
- 1699853457NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3476733932
- NPI enumeration date
- November 1, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (510) 307-1555
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory Lee Chen practices at Richmond Medical Center in Richmond, California
Dr. Chen's primary practice is Richmond Medical Center, at 901 Nevin Ave, Richmond, CA 94801 in Contra Costa County. The practice phone is (510) 307-1555.
- Richmond Medical Center901 Nevin Ave, Richmond, CA 94801 · Contra Costa CountyPhone(510) 307-1555
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gregory Lee Chen is affiliated with 2 sites of care and 1 medical group
Dr. Chen's primary practice is Richmond Medical Center in Richmond, California. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Chen to 1 more group practice or clinic, named with a free account.
Richmond Medical CenterPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregory Lee 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 |
|---|---|
| Richmond Medical Center | 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. Gregory Lee Chen is one of 1,395 urologists in California
Urology is Dr. Chen's primary specialty in the NPI Registry, under taxonomy code 208800000X. Dr. Chen is board certified in urology by the American Board of Urology. Dmand AI has Dr. Chen's licenses on file in 2 states: California and Pennsylvania.
Specialties and state licenses
- Urology, CaliforniaPrimary
- Pennsylvania license
Urologists near Dr. Chen
Counts of urologists 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. Gregory Lee Chen treated 14 Medicare patients in 2024, average age 69
CMS counts 14 Medicare patients who saw Dr. Chen in 2024. 75% of them have high blood pressure. Their average risk score is 2.85, 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 67, with 23% women.
Medicare patients, 202414
Average age69
Average risk score2.85
Chronic conditions among Dr. Chen's Medicare patients, 2024
- High blood pressure75%
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 67
Patient panel by sex, all payers
- Women23%
- Men76%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory Lee Chen wrote 1,939 Medicare Part D claims in 2024
In 2024, Dr. Chen wrote 1,939 Medicare Part D claims for 742 patients. 96% of them were for generic drugs. CMS names the drug for 1,833 of them, across 20 drugs with 11 or more claims each, at $107,653 in total drug cost. In 2023, CMS named 1,887 claims across 18 drugs.
Part D claims, 20241,939
Drugs named by CMS20
Total drug cost$107,653
Part D patients742
Dr. Chen's Part D claims by kind of drug, 2024
- Generic1,866 claims96%
- Brand-name73 claims4%
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%43 of 1,939 claims
- Antibiotics13%251 of 1,939 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: 1,8872024: 1,8333%
Drugs named by CMS: 20 in 2024, 18 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. Gregory Lee 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. Gregory Lee Chen has 4 publications on record
Dmand AI links 4 papers to Dr. Chen. The most frequent topics are Erectile Dysfunction. Dr. Chen has published most often in J Urol. Dr. Chen's most frequent co-authors are Richard E. Berger, MD and William John Ellis.
Papers4
Topics Dr. Chen writes about most
- Erectile Dysfunction
Dr. Chen's most frequent co-authors
Recent publications by Dr. Chen
Erectile DysfunctionPenile ProsthesisProsthesis Design
Erectile DysfunctionFistulaPenile Diseases
LeukocytesReactive Oxygen SpeciesSemen
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 urologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gregory Lee Chen received $131 in industry payments from 2016 to 2025
CMS Open Payments shows 2 general payments to Dr. Chen from 2 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Astellas Pharma US Inc paid the most, $115.
General payments to Dr. Chen by program year, 2016 to 2025
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. Gregory Lee Chen has 1 award and honors on record
Dmand AI lists 1 award for Dr. Chen, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Chen
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Gregory Lee Chen graduated from Rush Medical College
Dr. Chen graduated from Rush Medical College in 1992.
- Medical school
- Board certified in urology
Source: Dmand AI Professional Profile Data
Dr. Gregory Lee 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. Gregory Lee 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 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) |
| 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Gregory Lee 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. Gregory Lee Chen's NPI number?
Dr. Gregory Lee Chen's NPI number is 1699853457. It was assigned on November 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory Lee Chen?
Dr. Gregory Lee Chen is a urologist in Richmond, California. The primary specialty in the NPI Registry is Urology Physician (taxonomy code 208800000X).
Where does Dr. Gregory Lee Chen practice?
Dr. Chen practices at 901 Nevin Ave, Richmond, CA 94801. Dr. Chen's primary practice is Richmond Medical Center in Richmond, California. Dmand AI also links Dr. Chen to 1 group practice or clinic.
What is Dr. Gregory Lee Chen's office phone number?
The practice phone on file for Dr. Chen is (510) 307-1555.
What is Dr. Gregory Lee Chen's medical license number?
Dr. Chen holds California license G84622, one of the licenses on file in 2 states.
Which states has Dr. Gregory Lee Chen been licensed in?
Dmand AI has state licenses on file for Dr. Chen in California (1998 to 2027) and Pennsylvania (1998 to 2000).
What medical group is Dr. Gregory Lee Chen part of?
Dr. Chen is linked to The Permanente Medical Group, Inc.
Does Dr. Gregory Lee Chen accept Medicare?
Yes. CMS lists Dr. Chen as accepting Medicare assignment.
How many Medicare patients does Dr. Gregory Lee Chen see?
CMS counts 14 Medicare patients who saw Dr. Chen in 2024, with an average age of 69.
Is Dr. Gregory Lee Chen board certified?
Yes. Dr. Chen is board certified in urology by the American Board of Urology.
Show 7 more questionsShow fewer questions
Where did Dr. Gregory Lee Chen go to medical school?
Dr. Chen graduated from Rush Medical College in 1992.
What drugs does Dr. Gregory Lee Chen prescribe most?
In 2024 Medicare Part D data, Dr. Chen's most prescribed drugs by claims were Tamsulosin HCl, Finasteride and Trospium Chloride.
Has Dr. Gregory Lee Chen received payments from drug or device companies?
CMS Open Payments shows $131 in general payments to Dr. Chen from 2 companies from 2016 to 2025. The largest total came from Astellas Pharma US Inc.
How long has Dr. Gregory Lee Chen been practicing?
Dr. Chen graduated from medical school in 1992, 34 years ago.
Does Dr. Gregory Lee Chen do research?
Dmand AI links 4 publications to Dr. Chen.
Who does Dr. Gregory Lee Chen publish with?
Dr. Chen's most frequent co-authors are Richard E. Berger, MD (1 shared paper) and William John Ellis (1 shared paper).
What insurance does Dr. Gregory Lee 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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