Quick answers
- Where does Ya Ju Chang see patients?
- Medicare's clinician data lists 1 practice location in New York, NY. Call before your visit to confirm the address.
- What is Ya Ju Chang's specialty?
- Medicare lists Rheumatology as the primary specialty.
- Does Ya Ju Chang accept Medicare assignment?
- Yes. Medicare's clinician data says Ya Ju Chang accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Ya Ju Chang?
- (212) 334-9591, as listed in official Medicare / NPI Registry data.
- What is Ya Ju Chang's NPI number?
- 1801879119. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Ya Ju Chang is enrolled with Medicare (CMS data updated 2026-10-02).
- 41 Elizabeth St, Suite 203New York, NY 10013 (212) 334‑9591
Specialties
- Rheumatologyprimary
Other rheumatologists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1801879119 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians