Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1699853457 Individual Practitioner Male Practitioner

Dr. Gregory Lee Chen , MD

Urology • Hayward, CA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Gregory Chen, MD is a certified Urology practicing in Hayward, CA. With approximately 34 years of clinical experience since graduating from Rush Medical College Of Rush University in 1992, Dr. Chen delivers high-quality medical care to the local community at 27303 SLEEPY HOLLOW AVE S.

Dr. Chen is affiliated with Permanente Medical Group Inc and accepts Medicare assignment.

Practice Location & Contact Primary Location

Practice Address

27303 Sleepy Hollow Ave S

Hayward, CA 945454203

Telephone 5104541000
Associated Practice Facility / Clinic

Medicare Profile & Education

Medical School

Rush Medical College Of Rush University

Graduation Year

1992

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Urology in Hayward, CA

Senior Veteran Specialist (>20 Yrs)
Practitioner Clinical Experience
34 Yrs +11.8 yrs vs City Avg
City Avg: 22.2 Yrs
State Avg: 27.5 Yrs
Regional Practice Density
8 Specialists

Practicing in Hayward, CA (1624 Statewide)

Telehealth Adoption Rate
37.5% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Chen (34 Years) 34 Yrs
Hayward Specialty Average (22.2 Years) 22.2 Yrs

Medical Specialties & State Licenses

Urology Primary Specialty

NUCC Taxonomy Code: 208800000X

State License CA G84622

A urologist manages benign and malignant medical and surgical disorders of the genitourinary system and the adrenal gland. This specialist has comprehensive knowledge of and skills in endoscopic, percutaneous and open surgery of congenital and acquired conditions of the urinary and reproductive systems and their contiguous structures.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID
00G846220 (CA)

Hospital & Practice Group Affiliations

Permanente Medical Group Inc

27303 Sleepy Hollow S Ave, Hayward, CA 945454203

Phone: 5107844000

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

40 Associated Practitioners
NPI 1003073933

Doctor of Medicine (M.D.)

Dr. Kai-Yin See , MD

Radiology - Diagnostic Neuroimaging

NPI 1003246869

Doctor of Medicine (M.D.)

Anthony Battaglia , RN

Registered Nurse

NPI 1003700360

Registered Nurse

NPI 1003902719

Doctor of Pharmacy (Pharm.D.)

Mary Ann Bloyer , CNM

Advanced Practice Midwife

NPI 1003952276

Certified Nurse Midwife

Elizabeth Macera , NP

Nurse Practitioner

NPI 1003979295

Nurse Practitioner

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

8 Historical Events
📍
Updated Practice Location December 13, 2021

Registered at 27303 SLEEPY HOLLOW AVE S, HAYWARD, CA 945454203 (Tel: 5104541000)

📍
Updated Business Mailing Address December 13, 2021

Registered at 27303 SLEEPY HOLLOW AVE S, HAYWARD, CA 945454203 (Tel: 5104541000)

NPI Profile Active July 30, 2015

NPI status registered as active in NPPES database

📍
Updated Practice Location July 30, 2015

Registered at 27303 SLEEPY HOLLOW AVENUE, HAYWARD, CA 945454203 (Tel: 5104541000)

📍
Updated Business Mailing Address July 30, 2015

Registered at 27303 SLEEPY HOLLOW AVENUE, HAYWARD, CA 945454203 (Tel: 5104541000)

👤
Provider Name / Credentials Updated July 30, 2015

Recorded as GREGORY CHEN, M.D.

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) July 30, 2015

Urology (License #G84622 in CA)

🟢
Initial NPI Registration & Enumeration November 01, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1699853457
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: November 01, 2006
Last Update: December 13, 2021
Sole Proprietor: No

Mailing Address

27303 Sleepy Hollow Ave S

Hayward, CA 945454203

Phone: 5104541000

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.