Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Gregory Lee Chen, MD

Individual provider Urology Physician · NPI 1699853457

Gregory Lee Chen, MD practises Urology in Monterey, California. Graduated from Rush Medical College of Rush University in 1992, 34 years ago. Practices with Permanente Medical Group Inc, a 10,941-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
34
Trained at
Rush Medical College of Rush University
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2 Uppr Ragsdale DR Bldg E
Monterey, CA 93940-7843
Phone: (831) 333-3040
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 27303 Sleepy Hollow Ave S, Hayward, CA 94545-4203 — (510) 454-1000

Specialties & licences

Urology Physician (primary) Taxonomy 208800000X · Licence G84622 (CA)

Record details

NPI number1699853457
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 1, 2006
Last updated in NPPESSeptember 25, 2026
Certification dateSeptember 25, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyUROLOGY
Medical schoolRUSH MEDICAL COLLEGE OF RUSH UNIVERSITY
Graduated 1992 (34 years in practice)
Group practice Permanente Medical Group Inc — 10941 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients14
Services billed 26 a service is one billed item, such as a visit, a test or a procedure
Average patient age69

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $115 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Colleagues at Permanente Medical Group Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 10941 clinicians in the practice; 12 are shown here.

Other providers in Monterey