Wayne Chang, MD
NPI 1306926076 · Occupational Medicine Physician · Orange, CA
Enrolled with Medicare as Practitioner - Other (physician) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Wayne Chang, MD is a Occupational Medicine Physician provider in Orange, CA (NPI 1306926076).
Provider details
- NPI number
- 1306926076
- Entity type
- Individual
- Primary specialty
- Occupational Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A73679 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
- 2006-10-17
- Last updated
- 2022-11-03
- Certified
- 2022-11-03
Frequently asked questions
- What is Wayne Chang's NPI number?
- Wayne Chang's National Provider Identifier (NPI) is 1306926076, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Wayne Chang's specialty?
- Wayne Chang is listed in the NPPES registry with a primary specialty of Occupational Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Wayne Chang located?
- Wayne Chang's practice location on file with NPPES is 101 the City Dr S, Orange, CA 92868-3201.
- What is Wayne Chang's phone number?
- The practice phone number listed in the NPPES registry for Wayne Chang is (714) 880-7812.
- Does Wayne Chang accept Medicare?
- Wayne Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Wayne Chang's NPI active?
- Yes — Wayne Chang's NPI (1306926076) is active in the NPPES registry as of the last update on 2022-11-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.