IndividualActive
John Chang, MD
NPI 1023043387 · Internal Medicine Physician · Los Angeles, CA
John Chang, MD is a Internal Medicine Physician provider in Los Angeles, CA (NPI 1023043387).
Provider details
- NPI number
- 1023043387
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A69499 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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
200 Medical Plaza
#365
Los Angeles, CA 90095-3075
Phone: (310) 825-0631
Street-level locationGet directions
Mailing address
5767 W Century Blvd
Los Angeles, CA 90045-5632
Registry dates
- Enumerated
- 2006-07-12
- Last updated
- 2010-06-09
Frequently asked questions
- What is John Chang's NPI number?
- John Chang's National Provider Identifier (NPI) is 1023043387, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Chang's specialty?
- John Chang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Chang located?
- John Chang's practice location on file with NPPES is 200 Medical Plaza, Los Angeles, CA 90095-3075.
- What is John Chang's phone number?
- The practice phone number listed in the NPPES registry for John Chang is (310) 825-0631.
- Is John Chang's NPI active?
- Yes — John Chang's NPI (1023043387) is active in the NPPES registry as of the last update on 2010-06-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.