Quick answers
- Which hospitals does Geethan Sivananthan work at?
- Medicare's official clinician data lists Geethan Sivananthan at 2 hospitals: Cooperman Barnabas Medical Center and Overlook Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Geethan Sivananthan see patients?
- Medicare's clinician data lists 1 practice location in Union, NJ. Call before your visit to confirm the address.
- What is Geethan Sivananthan's specialty?
- Medicare lists Gastroenterology as the primary specialty, and also Internal Medicine.
- Does Geethan Sivananthan accept Medicare assignment?
- Yes. Medicare's clinician data says Geethan Sivananthan 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.
- Does Geethan Sivananthan offer telehealth?
- Medicare's clinician data says Geethan Sivananthan offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Geethan Sivananthan?
- (908) 688-6565, as listed in official Medicare / NPI Registry data.
- What is Geethan Sivananthan's NPI number?
- 1598907990. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Geethan Sivananthan works
Medicare's Facility Affiliation Data lists Geethan Sivananthan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cooperman Barnabas Medical CenterLivingston, NJ · Acute Care Hospital · CCN 310076
- Overlook Medical CenterSummit, NJ · Acute Care Hospital · CCN 310051
Practice locations
Addresses where Geethan Sivananthan is enrolled with Medicare (CMS data updated 2026-10-02).
- 695 Chestnut StUnion, NJ 07083 (908) 688‑6565
Group practices
Medicare enrollment lists Geethan Sivananthan as a member of these groups (CMS data updated 2026-10-02).
- Allied Digestive Health LLC286 clinicians in the group
- Center for Digestive Diseases PA3 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Union
Clinicians with the same Medicare primary specialty in Union, NJ — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Rutgers New Jersey Medical School |
| Graduation year | 2009 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1598907990 |
| 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