Vivian Chang
NPI 1083177265 · Neonatal-Perinatal Medicine Physician · Orange, CA
Enrolled with Medicare as Order and Referring Only - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Vivian Chang is a Neonatal-Perinatal Medicine Physician provider in Orange, CA (NPI 1083177265).
Provider details
- NPI number
- 1083177265
- Entity type
- Individual
- Primary specialty
- Neonatal-Perinatal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- A200305 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
7 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-04-13
- Last updated
- 2026-01-22
- Certified
- 2026-01-22
Frequently asked questions
- What is Vivian Chang's NPI number?
- Vivian Chang's National Provider Identifier (NPI) is 1083177265, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Vivian Chang's specialty?
- Vivian Chang is listed in the NPPES registry with a primary specialty of Neonatal-Perinatal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Vivian Chang located?
- Vivian Chang's practice location on file with NPPES is 1201 W La Veta Ave, Orange, CA 92868-4203.
- What is Vivian Chang's phone number?
- The practice phone number listed in the NPPES registry for Vivian Chang is (714) 203-2181.
- Does Vivian Chang accept Medicare?
- Vivian Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Vivian Chang's NPI active?
- Yes — Vivian Chang's NPI (1083177265) is active in the NPPES registry as of the last update on 2026-01-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.