Quick answers
- Which hospitals does John I. Nwankwo work at?
- Medicare's official clinician data lists John I. Nwankwo at 5 hospitals: Hackensack Meridian Mountainside Medical, Mercy Hospital of Buffalo, Northern Dutchess Hospital, South Brooklyn Health and Vassar Brothers Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John I. Nwankwo see patients?
- Medicare's clinician data lists 4 practice locations, including New York, NY, Brooklyn, NY and Buffalo, NY. Call before your visit to confirm the address.
- What is John I. Nwankwo's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does John I. Nwankwo accept Medicare assignment?
- Medicare's clinician data says John I. Nwankwo may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for John I. Nwankwo?
- (845) 279-5711, as listed in official Medicare / NPI Registry data.
- What is John I. Nwankwo's NPI number?
- 1831400498. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John I. Nwankwo works
Medicare's Facility Affiliation Data lists John I. Nwankwo at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Hackensack Meridian Mountainside MedicalMontclair, NJ · Acute Care Hospital · CCN 310054
- Mercy Hospital of BuffaloBuffalo, NY · Acute Care Hospital · CCN 330279
- Northern Dutchess HospitalRhinebeck, NY · Acute Care Hospital · CCN 330049
- South Brooklyn HealthBrooklyn, NY · Acute Care Hospital · CCN 330196
- Vassar Brothers Medical CenterPoughkeepsie, NY · Acute Care Hospital · CCN 330023
Practice locations
Addresses where John I. Nwankwo is enrolled with Medicare (CMS data updated 2026-10-02).
- 242 W 53rd StNew York, NY 10019 (845) 279‑5711
- 2601 Ocean PkwyBrooklyn, NY 11235 (718) 616‑5356
- 2950 Elmwood AveBuffalo, NY 14217 (716) 447‑6111
- 45 Reade Pl, Fl 2Poughkeepsie, NY 12601 (845) 431‑5644
Group practices
Medicare enrollment lists John I. Nwankwo as a member of these groups (CMS data updated 2026-10-02).
- Physician Affiliate Group of New York PC1,225 clinicians in the group
- Nuvance Health Medical Practice PC595 clinicians in the group
- Empire State Radiology P C268 clinicians in the group
- Radiology Affiliates of Central New Jersey PC131 clinicians in the group
- Sra Medical Imaging LLC39 clinicians in the group
- Niagara Frontier Radiologic Associates PC23 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Johns Hopkins University School Of Medicine |
| Graduation year | 2005 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1831400498 |
| 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