Dr. Gary W. Chien, MD
- Medicare patients, 2024
- 13
- Part D claims, 2024
- 616
- Publications
- 1
- Hospital affiliations
- 1
- Industry payments
- $3,517
- Practice address
- 4867 Sunset Blvd, Los Angeles, CA 90027
- Practice phone
- Call (323) 783-4011
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Chien'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. Gary W. Chien is a urologist in Los Angeles, California
Dr. Chien practices at Kaiser Permanente Los Angeles Medical Center in Los Angeles, California, part of Kaiser Permanente.
Dr. Chien's NPI, 1639121395, was assigned on May 17, 2006. Dr. Chien graduated from SUNY Downstate Health Sciences University in 1997. Dr. Chien holds California license A67944.
- NPI
- 1639121395NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1052359494
- NPI enumeration date
- May 17, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (323) 783-4011
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gary W. Chien practices at Kaiser Permanente Los Angeles Medical Center in Los Angeles, California
Dr. Chien's primary practice is Kaiser Permanente Los Angeles Medical Center, at 4867 Sunset Blvd, Los Angeles, CA 90027 in Los Angeles County. The practice phone is (323) 783-4011.
- Kaiser Permanente Los Angeles Medical Center4867 Sunset Blvd, Los Angeles, CA 90027 · Los Angeles CountyPhone(323) 783-4011
Source: Dmand AI Affiliation Data
Dr. Gary W. Chien is affiliated with 2 sites of care and 1 medical group
Dr. Chien's primary practice is Kaiser Permanente Los Angeles Medical Center in Los Angeles, California, part of Kaiser Permanente. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Chien to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gary W. Chien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chien practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Permanente Los Angeles Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Gary W. Chien is one of 1,395 urologists in California
Urology is Dr. Chien's primary specialty in the NPI Registry, under taxonomy code 208800000X. Dr. Chien is board certified in urology by the American Board of Urology. Dmand AI has Dr. Chien's licenses on file in 2 states: California and Illinois.
Specialties and state licenses
- Urology, CaliforniaPrimary
- Illinois license
Clinical focus
Dmand AI lists kidney cysts and urinary endoscopy among the conditions Dr. Chien treats.
Urologists near Dr. Chien
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. Gary W. Chien treated 13 Medicare patients in 2024, average age 70
CMS counts 13 Medicare patients who saw Dr. Chien in 2024. Their average risk score is 1.79, 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. Chien's median patient age at 70, with 34% women.
Dr. Chien's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women34%
- Men65%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gary W. Chien wrote 616 Medicare Part D claims in 2024
In 2024, Dr. Chien wrote 616 Medicare Part D claims for 179 patients. 99% of them were for generic drugs. CMS names the drug for 548 of them, across 9 drugs with 11 or more claims each, at $13,236 in total drug cost. In 2023, CMS named 534 claims across 7 drugs.
Dr. Chien's Part D claims by kind of drug, 2024
- Generic607 claims99%
- Brand-name and other9 claims1%
Dr. Chien'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. Chien's Part D claims, 2024
- Antibiotics8%50 of 616 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: 5342024: 5483%
Drugs named by CMS: 9 in 2024, 7 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. Gary W. Chien takes part in Medicare
Dr. Chien 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. Gary W. Chien has 1 publication on record
Dmand AI links 1 paper to Dr. Chien. Dr. Chien's most frequent co-authors are George A. Abdelsayed and Patrick Sean Kilday, MD.
Dr. Chien's most frequent co-authors
Recent publications by Dr. Chien
See who Dr. Chien researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chien 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. Gary W. Chien received $3,517 in industry payments from 2016 to 2025
CMS Open Payments shows 21 general payments to Dr. Chien from 10 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 41% of the total. Intuitive Surgical, Inc. paid the most, $2,561.
General payments to Dr. Chien by program year, 2016 to 2025
General payments to Dr. Chien by kind, 2016 to 2025
- Food and beverage$1,44941%
- Education$1,25036%
- Travel and lodging$81723%
Companies that paid Dr. Chien 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. Gary W. Chien has 1 award and honors on record
Dmand AI lists 1 award for Dr. Chien, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Chien
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Gary W. Chien graduated from SUNY Downstate Health Sciences University
Dr. Chien graduated from SUNY Downstate Health Sciences University in 1997. Dr. Chien is a member of AUA.
- Medical school
- Board certified in urology
Source: Dmand AI Professional Profile Data
Dr. Gary W. Chien accepts plans from 2 insurance carriers
Dr. Chien 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. Chien accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Gary W. Chien'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 DataDmand AI Org Hierarchy 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. Gary W. Chien
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. Gary W. Chien's NPI number?
Dr. Gary W. Chien's NPI number is 1639121395. It was assigned on May 17, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gary W. Chien?
Dr. Gary W. Chien is a urologist in Los Angeles, California. The primary specialty in the NPI Registry is Urology Physician (taxonomy code 208800000X).
Where does Dr. Gary W. Chien practice?
Dr. Chien practices at 4867 Sunset Blvd, Los Angeles, CA 90027. Dr. Chien's primary practice is Kaiser Permanente Los Angeles Medical Center in Los Angeles, California, part of Kaiser Permanente. Dmand AI also links Dr. Chien to 1 group practice or clinic.
What is Dr. Gary W. Chien's office phone number?
The practice phone on file for Dr. Chien is (323) 783-4011.
What is Dr. Gary W. Chien's medical license number?
Dr. Chien holds California license A67944, one of the licenses on file in 2 states.
Which states has Dr. Gary W. Chien been licensed in?
Dmand AI has state licenses on file for Dr. Chien in California (1999 to 2027) and Illinois (2002 to 2005).
Which hospitals is Dr. Gary W. Chien affiliated with?
Dr. Chien practices at Kaiser Permanente Los Angeles Medical Center in Los Angeles, California.
What medical group is Dr. Gary W. Chien part of?
Dr. Chien is linked to Southern California Permanente Medical Group.
Does Dr. Gary W. Chien accept Medicare?
Yes. CMS lists Dr. Chien as accepting Medicare assignment.
How many Medicare patients does Dr. Gary W. Chien see?
CMS counts 13 Medicare patients who saw Dr. Chien in 2024, with an average age of 70.
Show 8 more questionsShow fewer questions
Is Dr. Gary W. Chien board certified?
Yes. Dr. Chien is board certified in urology by the American Board of Urology.
Where did Dr. Gary W. Chien go to medical school?
Dr. Chien graduated from SUNY Downstate Health Sciences University in 1997.
What drugs does Dr. Gary W. Chien prescribe most?
In 2024 Medicare Part D data, Dr. Chien's most prescribed drugs by claims were Finasteride, Tamsulosin HCl and Terazosin HCl.
Has Dr. Gary W. Chien received payments from drug or device companies?
CMS Open Payments shows $3,517 in general payments to Dr. Chien from 10 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Gary W. Chien been practicing?
Dr. Chien graduated from medical school in 1997, 29 years ago.
Does Dr. Gary W. Chien do research?
Dmand AI links 1 publication to Dr. Chien.
Who does Dr. Gary W. Chien publish with?
Dr. Chien's most frequent co-authors are George A. Abdelsayed (1 shared paper) and Patrick Sean Kilday, MD (1 shared paper).
What insurance does Dr. Gary W. Chien accept?
Dr. Chien 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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