Quick answers
- Which hospitals does Prakash Viswanathan work at?
- Medicare's official clinician data lists Prakash Viswanathan at 2 hospitals: Long Island Community Hospital and NYU Langone Hospitals. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Prakash Viswanathan see patients?
- Medicare's clinician data lists 6 practice locations, including New York, NY, Mineola, NY and East Patchogue, NY. Call before your visit to confirm the address.
- What is Prakash Viswanathan's specialty?
- Medicare lists Gastroenterology as the primary specialty.
- Does Prakash Viswanathan accept Medicare assignment?
- Yes. Medicare's clinician data says Prakash Viswanathan 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 Prakash Viswanathan?
- (212) 263-9700, as listed in official Medicare / NPI Registry data.
- What is Prakash Viswanathan's NPI number?
- 1649428574. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Prakash Viswanathan works
Medicare's Facility Affiliation Data lists Prakash Viswanathan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Long Island Community HospitalPatchogue, NY · Acute Care Hospital · CCN 330141
- NYU Langone HospitalsNew York, NY · Acute Care Hospital · CCN 330214
Practice locations
Addresses where Prakash Viswanathan is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 111 BroadwayNew York, NY 10006 (212) 263‑9700
- 259 1st StMineola, NY 11501
- 285 Sills RdEast Patchogue, NY 11772 (631) 475‑2858
- 530 1st AveNew York, NY 10016 (212) 263‑7300
- 550 1st AveNew York, NY 10016 (212) 263‑7300
Group practices
Medicare enrollment lists Prakash Viswanathan as a member of this group (CMS data updated 2026-10-02).
- New York University6,134 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2005 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1649428574 |
| 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