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VIVIAN CHANG
NPI 1083177265
Pediatrics - Neonatal-Perinatal Medicine in Orange, CA

Active since April 13, 2019PECOS Enrolled
101 THE CITY DR S, ORANGE, CA 92868(714) 456-8888 Get Directions Write a Review

NPPES record last updated: June 24, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 22, 2026, Apr 13, 2019 (2 updates tracked since 2019).

About Vivian Chang NPPES

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

VIVIAN CHANG (NPI 1083177265) is an individual neonatal-perinatal medicine provider in Orange, California, licensed in California (A200305) and active in the NPI registry since April 2019. She is enrolled in Medicare PECOS, maintains a secondary practice location in Orange, and is a graduate of Other (2019).

NPPES Registry Identity

NPI1083177265
Entity TypeIndividualFemale
Primary Taxonomy2080N0001X
Provider Legal NameVIVIAN CHANG
Location Address101 THE CITY DR SOrange, CA 92868-3201
Mailing Address101 The City Dr SOrange, CA 92868-3201
Phone(714) 456-8888
Sole ProprietorNo
Medical School CMSOtherGraduated 2019
Enumeration DateApril 13, 2019
Last NPPES UpdateJune 24, 20262 updates tracked since enumeration
NPPES CertifiedJune 24, 2026
✔ NPI 1083177265 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Neonatal-Perinatal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080N0001X
License✔ Licensed in CA · A200305
Definition
A pediatrician who is the principal care provider for sick newborn infants. Clinical expertise is used for direct patient care and for consulting with obstetrical colleagues to plan for the care of mothers who have high-risk pregnancies.
101 THE CITY DR S, Orange, CA 92868
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Secondary Practice Location 1

Location 11201 W La Veta AveOrange, CA 92868-4203 · Phone (714) 203-2181

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Vivian Chang is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID840525788
PECOS Enrollment IDI20260630004732
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 Vivian Chang reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Uc Regents Uci Dept Of Pediatrics
0.3 mi
Pediatrics
101 THE CITY DR S
Orange, CA 92868
  • Reassigned Medicare billing, California enrollment
  • 143 clinicians in this Medicare group
NPI 1235187311 (714) 456-8068

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

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. ANKIT BHUPENDRA PATEL D.O.
Radiology (Diagnostic Radiology)
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-5113
DR. LAURA CATHERINE SKOCZYLAS MD
Obstetrics & Gynecology
101 THE CITY DR S, BUILDING 56, DEPARTMENT OF OB/GYN
ORANGE, CA 92868
Orange County (714) 456-8224
MICHAEL CHENG DO
Internal Medicine (Rheumatology)
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-7110
AESTHETIC AND PLASTIC SURGERY INSTITUTE
Plastic Surgery
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-2986
JOSEPH VILLARREAL M.D.
Emergency Medicine
101 THE CITY DR S, BUILDING 1A, ROOM 1009
ORANGE, CA 92868
Orange County (714) 456-5239
DEMI TRAN
Psychiatry & Neurology (Neurology)
101 THE CITY DR S, CITY TOWER, SUITE 400
ORANGE, CA 92868
Orange County (171) 456-6693
DR. ISABEL CARLTON CLARK M.D.
Surgery (Trauma Surgery)
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-7890
DYLAN LUKATO
Emergency Medicine
101 THE CITY DR S
ORANGE, CA 92868
Orange County (415) 218-8041

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 Vivian Chang's NPI number?

The NPI number for Vivian Chang is 1083177265. It was assigned to this individual provider in the NPPES registry on April 13, 2019.

Where is Vivian Chang located?

Vivian Chang practices at 101 The City Dr S, Orange, CA 92868. The listed phone number is (714) 456-8888.

What is Vivian Chang's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.

Is Vivian Chang enrolled in Medicare?

Yes. Vivian Chang is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Vivian Chang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Vivian Chang reassigns Medicare benefits to Uc Regents Uci Dept Of Pediatrics (Orange, 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 Vivian Chang'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 Vivian Chang was last updated on June 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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.