1. Home
  2. Directory
  3. California
  4. Los Angeles
  5. Obstetrics Gynecology
  6. NPI Profile

OLGA DIAZ MD
NPI 1285011908
Obstetrics & Gynecology in Los Angeles, CA

Active since May 01, 2015PECOS EnrolledAccepts Medicare Assignment
1200 N STATE ST, IPT C3F107, LOS ANGELES, CA 90033(323) 409-8848(323) 441-7219 Get Directions Write a Review

NPPES record last updated: January 13, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Olga Diaz Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

OLGA DIAZ MD (NPI 1285011908) is an individual obstetrics & gynecology provider in Los Angeles, California, licensed in California (A135754) and active in the NPI registry since May 2015. She is enrolled in Medicare PECOS and is a graduate of University Of California, San Francisco School Of Medicine (2013).

NPPES Registry Identity

NPI1285011908
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameOLGA DIAZCredential: MD
Location Address1200 N STATE ST, IPT C3F107Los Angeles, CA 90033-1029
Mailing Address1200 N State St, Ipt C3f107Los Angeles, CA 90033-1029
Phone(323) 409-8848
Fax(323) 441-7219
Sole ProprietorYes
Medical School CMSUniversity Of California, San Francisco School Of MedicineGraduated 2013
Enumeration DateMay 1, 2015
Last NPPES UpdateJanuary 13, 2022
NPPES CertifiedJanuary 13, 2022
✔ NPI 1285011908 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in CA · A135754
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
1200 N STATE ST, Los Angeles, CA 90033
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Olga Diaz Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4981962479
PECOS Enrollment IDI20171208002731
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Olga Diaz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
310 mi
Internal Medicine
710 LAWRENCE EXPRESSWAY
Santa Clara, CA 95051
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1073606299 (408) 851-1000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90033 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. LUCILLE CHAILLE
Orthopaedic Surgery
1200 N STATE ST
LOS ANGELES, CA 90033
Los Angeles County (323) 226-2170
DR. THIENDANG VIET NGUYEN M.D.
Anesthesiology
1200 N STATE ST, #14-901
LOS ANGELES, CA 90033
Los Angeles County (323) 409-7748
DR. PHIL ORALLO CASTILLO M.D.
Anesthesiology
1200 N STATE ST, ROOM 14-901
LOS ANGELES, CA 90033
Los Angeles County (323) 226-4597
NOA CARTER STERLING M.D.
Obstetrics & Gynecology
1200 N STATE ST, INPT TOWER C3F107
LOS ANGELES, CA 90033
Los Angeles County (323) 409-8847
CHRYSTAL LYNNE JONES RCP
Respiratory Therapist, Certified (Critical Care)
1200 N STATE ST
LOS ANGELES, CA 90033
Los Angeles County (323) 409-1000
MAY SUNDONGMEI WU RESP THERAPIST
Respiratory Therapist, Registered (Critical Care)
1200 N STATE ST
LOS ANGELES, CA 90033
Los Angeles County (323) 409-1824
BRETT BARRO
Student in an Organized Health Care Education/Training Program
1200 N STATE ST, CLINIC TOWER SUITE A7D
LOS ANGELES, CA 90033
Los Angeles County (213) 705-5282
ALBERT CHEN MD
Student in an Organized Health Care Education/Training Program
1200 N STATE ST, CLINIC TOWER, SUITE A7D
LOS ANGELES, CA 90033
Los Angeles County (323) 442-7686

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Olga Diaz's NPI number?

The NPI number for Olga Diaz is 1285011908. It was assigned to this individual provider in the NPPES registry on May 1, 2015.

Where is Olga Diaz located?

Olga Diaz practices at 1200 N State St Ipt C3f107, Los Angeles, CA 90033. The listed phone number is (323) 409-8848.

What is Olga Diaz's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Olga Diaz enrolled in Medicare?

Yes. Olga Diaz is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Olga Diaz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Olga Diaz reassigns Medicare benefits to Permanente Medical Group Inc (Santa Clara, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Olga Diaz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Olga Diaz was last updated on January 13, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.