Quick answers
- Which hospitals does Gregory Chang work at?
- Medicare's official clinician data lists Gregory Chang at 1 hospital: New York-Presbyterian Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory Chang see patients?
- Medicare's clinician data lists 3 practice locations, including New York, NY. Call before your visit to confirm the address.
- What is Gregory Chang's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Gregory Chang accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory 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 Gregory Chang?
- (212) 639-7203, as listed in official Medicare / NPI Registry data.
- What is Gregory Chang's NPI number?
- 1154940419. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregory Chang works
Medicare's Facility Affiliation Data lists Gregory Chang at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- New York-Presbyterian HospitalNew York, NY · Acute Care Hospital · CCN 330101
Practice locations
Addresses where Gregory Chang is enrolled with Medicare (CMS data updated 2026-10-02).
- 1275 York AveNew York, NY 10065 (212) 639‑7203
- 170 William StNew York, NY 10038 (212) 312‑5000
- 525 E 68th St, Emergency Physicians DeptNew York, NY 10021 (646) 962‑7300
Group practices
Medicare enrollment lists Gregory Chang as a member of these groups (CMS data updated 2026-10-02).
- Weill Medical College of Cornell2,051 clinicians in the group
- Memorial Urgent Care Group45 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1154940419 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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