Gary W. Chien, M.D.
Urology Physician · Los Angeles, CA
Gary W. Chien, M.D. is a urology physician with a practice address in Los Angeles, California, and NPI 1639121395, issued on May 17, 2006. Check the license (California A67944, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gary W. Chien
- Credential
- M.D.
- Primary taxonomy
- Urology Physician 208800000X
- License number
- A67944 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4900 W Sunset Blvd, Los Angeles, CA 90027
- Phone
- (800) 954-8000
- Enumerated
- May 17, 2006
- Record last updated
- Nov 18, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (562) 657-2114
- Medicare enrollment
- Enrolled (PECOS I20050418000698); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest urology physician records → All 1,524 in California → Look up another NPI →
Also registered at 4900 W Sunset Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jacob Boone, M.D.Urology Physician1295009256
- Jane Boucher, PHARM.D.Pharmacist1275617631
- John Brusky, MDUrology Physician1942323399
Verify Gary W. Chien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A67944Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average urology physician in 2024
616 Medicare Part D claims for 179 beneficiaries, against an average of 1,340 among the 10,782 providers of this specialty who prescribed in Part D.
Most prescribed
- Finasteride248 claims
- Tamsulosin Hcl110 claims
- Terazosin Hcl104 claims
- Potassium Citrate Er18 claims
- Trospium Chloride15 claims
- Estradiol14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gary W. Chien among 1,524 urology physician records in California
Gary W. Chien, M.D. is one of 1,524 urology physician records with a practice address in California. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 51% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1997 · median 2003 among the 1,049 with a school on file
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208800000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Urology Physician providers in California
There are 1,524 urology physician records in California.
All 1,524 in California → Every provider in Los Angeles → Urology Physician nationwide →
The 8 urology physician records with the nearest ZIP codes
- John Brusky, MDLos Angeles, CA 900271942323399
- Roger De Filippo, MDLos Angeles, CA 900271205922614
- Richard Hurwitz, MDLos Angeles, CA 900271851450506
- Jon Kaswick, MDLos Angeles, CA 900271831266717
- Dennis Kim, MDLos Angeles, CA 900271598813511
- Bradley Landis, M.D.Los Angeles, CA 900271538203583
- Monica Metzdorf, M.D.Los Angeles, CA 900271659427219
- James Murphy, MDLos Angeles, CA 900271780755744
Common questions
What is Gary W. Chien, M.D.'s NPI number?
Gary W. Chien, M.D.'s National Provider Identifier (NPI) is 1639121395, issued on May 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gary W. Chien, M.D. located?
The NPPES record lists a practice address at 4900 W Sunset Blvd, Los Angeles, CA, 90027. Phone: (800) 954-8000. Providers update this record themselves, so call before visiting.
How can I verify Gary W. Chien, M.D.'s license?
NPPES lists California license number A67944, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gary W. Chien, M.D. prescribe under Medicare Part D?
In 2024, Gary W. Chien, M.D. had 616 Medicare Part D claims for 179 beneficiaries; the average among urology physician prescribers was 1,340. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.