Simon Chang, DO
NPI 1144780230 · Internal Medicine Physician · Sylmar, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Simon Chang, DO is a Internal Medicine Physician provider in Sylmar, CA (NPI 1144780230).
Provider details
- NPI number
- 1144780230
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
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
83% 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
- 2019-03-23
- Last updated
- 2022-07-20
- Certified
- 2020-09-22
Frequently asked questions
- What is Simon Chang's NPI number?
- Simon Chang's National Provider Identifier (NPI) is 1144780230, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Simon Chang's specialty?
- Simon Chang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Simon Chang located?
- Simon Chang's practice location on file with NPPES is 14445 Olive View Dr, Sylmar, CA 91342.
- What is Simon Chang's phone number?
- The practice phone number listed in the NPPES registry for Simon Chang is (747) 210-3205.
- Does Simon Chang accept Medicare?
- Simon Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Simon Chang's NPI active?
- Yes — Simon Chang's NPI (1144780230) is active in the NPPES registry as of the last update on 2022-07-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.