Guillermo Urzua, M.D.
Obstetrics & Gynecology Physician · Los Angeles, CA
Guillermo Urzua, M.D. is an obstetrics & gynecology physician with a practice address in Los Angeles, California, and NPI 1841580479, issued on Apr 16, 2011. Check the license (California A110807, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Guillermo Urzua
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A110807 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
- Apr 16, 2011
- Record last updated
- Dec 2, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20111026000925); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 2008
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 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 Guillermo Urzua in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A110807Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
63 Medicare Part D claims for 26 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Estradiol29 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).
Guillermo Urzua among 5,088 obstetrics & gynecology physician records in California
Guillermo Urzua, M.D. is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 72% of them.
- NPI issued2011 · 72% of these records are older, 25% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2008 · median 2004 among the 2,700 with a school on file
- Record last updated2021 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Los Angeles → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Jonathan Azizzadeh, M.D.Los Angeles, CA 900271215949367
- Robert Chu, MDLos Angeles, CA 900271629145560
- Edward Drenth, MDLos Angeles, CA 900271578630414
- Lorrie Dubow, MDLos Angeles, CA 900271720159759
- William Fong, MDLos Angeles, CA 900271568533511
- Gladys Hernandez, MDLos Angeles, CA 900271255408084
- Eduard Minas, MDLos Angeles, CA 900271710097670
- Brian Miyazaki, MDLos Angeles, CA 900271235206111
Common questions
What is Guillermo Urzua, M.D.'s NPI number?
Guillermo Urzua, M.D.'s National Provider Identifier (NPI) is 1841580479, issued on Apr 16, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Guillermo Urzua, 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 Guillermo Urzua, M.D.'s license?
NPPES lists California license number A110807, 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 Guillermo Urzua, M.D. prescribe under Medicare Part D?
In 2024, Guillermo Urzua, M.D. had 63 Medicare Part D claims for 26 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.