Christopher Chang, D.O.
NPI 1134979537 · Student in an Organized Health Care Education/Training Program · O'Fallon, IL
Enrolled with Medicare as Order and Referring Only - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christopher Chang, D.O. is a Student in an Organized Health Care Education/Training Program provider in O'Fallon, IL (NPI 1134979537).
Provider details
- NPI number
- 1134979537
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
2 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
- 2024-03-26
- Last updated
- 2024-08-21
Frequently asked questions
- What is Christopher Chang's NPI number?
- Christopher Chang's National Provider Identifier (NPI) is 1134979537, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christopher Chang's specialty?
- Christopher Chang is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is Christopher Chang located?
- Christopher Chang's practice location on file with NPPES is 3 St. Elizabeth'S Blvd., O'Fallon, IL 62269.
- What is Christopher Chang's phone number?
- The practice phone number listed in the NPPES registry for Christopher Chang is (618) 233-7880.
- Does Christopher Chang accept Medicare?
- Christopher Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christopher Chang's NPI active?
- Yes — Christopher Chang's NPI (1134979537) is active in the NPPES registry as of the last update on 2024-08-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.