Olga Diaz, MD
Obstetrics & Gynecology Physician · Los Angeles, CA
Olga Diaz, MD is an obstetrics & gynecology physician with a practice address in Los Angeles, California, and NPI 1285011908, issued on May 1, 2015. Check the license (California A135754, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Olga Diaz
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A135754 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1200 N State St, Los Angeles, CA 90033
- Phone
- (323) 409-8848
- Enumerated
- May 1, 2015
- Record last updated
- Jan 13, 2022
- Fax
- (323) 441-7219
- Medicare enrollment
- Enrolled (PECOS I20171208002731); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 2013
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 1200 N State St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sadeea Abbasi, M.D., PH.D.Gastroenterology Physician1366713513
- Danna Abdel-Khader, MDInternal Medicine Physician1780977827
- Terri Leigh Abe, MDInternal Medicine Physician1881897569
- Mona Abedzadeh, M.A CCC-SLPSpeech-Language Pathologist1699988451
- Zachary AbelsonObstetrics & Gynecology Physician1689237414
- Laurel Aberle, MDStudent in an Organized Health Care Education/Training Program1184367484
Verify Olga Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A135754Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
308 Medicare Part D claims for 127 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Estradiol85 claims
- Yuvafem49 claims
- Fluconazole23 claims
- Clobetasol Propionate16 claims
- Dotti12 claims
- Progesterone12 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
- Permanente Medical Group IncAntioch, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Olga Diaz among 5,088 obstetrics & gynecology physician records in California
Olga Diaz, MD 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 2015, is newer than 83% of them.
- NPI issued2015 · 83% of these records are older, 15% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2013 · median 2004 among the 2,700 with a school on file
- Record last updated2022 · 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
- Karen GrayLos Angeles, CA 900331083769616
- Robert IsraelLos Angeles, CA 900331477652303
- Chasity Jennings-Nunez, MDLos Angeles, CA 900331245237445
- Ronald Johnson, MDLos Angeles, CA 900331013913722
- Kimberly Liggins, DNPLos Angeles, CA 900331023163656
- Ned Lindsay, M.D.Los Angeles, CA 900331154447910
- Sara Ludlow, M.D.Los Angeles, CA 900331861684250
- Heather Macdonald, M.D.Los Angeles, CA 900331326158619
Common questions
What is Olga Diaz, MD's NPI number?
Olga Diaz, MD's National Provider Identifier (NPI) is 1285011908, issued on May 1, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Olga Diaz, MD located?
The NPPES record lists a practice address at 1200 N State St, Los Angeles, CA, 90033. Phone: (323) 409-8848. Providers update this record themselves, so call before visiting.
How can I verify Olga Diaz, MD's license?
NPPES lists California license number A135754, 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 Olga Diaz, MD prescribe under Medicare Part D?
In 2024, Olga Diaz, MD had 308 Medicare Part D claims for 127 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.