Quick answers
- Which hospitals does Jaffer Ahmad work at?
- Medicare's official clinician data lists Jaffer Ahmad at 5 hospitals: Long Island Jewish Medical Center, Mercy Medical Center, North Shore University Hospital, Ns/Lij HS Southside Hospital and St Catherine of Siena Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Jaffer Ahmad see patients?
- Medicare's clinician data lists 2 practice locations, including Bay Shore, NY and Smithtown, NY. Call before your visit to confirm the address.
- What is Jaffer Ahmad's specialty?
- Medicare lists Hospitalist as the primary specialty, and also Internal Medicine.
- Does Jaffer Ahmad accept Medicare assignment?
- Yes. Medicare's clinician data says Jaffer Ahmad 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 Jaffer Ahmad?
- (631) 968-3636, as listed in official Medicare / NPI Registry data.
- What is Jaffer Ahmad's NPI number?
- 1518427988. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Jaffer Ahmad works
Medicare's Facility Affiliation Data lists Jaffer Ahmad at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Long Island Jewish Medical CenterNew Hyde Park, NY · Acute Care Hospital · CCN 330195
- Mercy Medical CenterRockville Centre, NY · Acute Care Hospital · CCN 330259
- North Shore University HospitalManhasset, NY · Acute Care Hospital · CCN 330106
- Ns/Lij HS Southside HospitalBay Shore, NY · Acute Care Hospital · CCN 330043
- St Catherine of Siena HospitalSmithtown, NY · Acute Care Hospital · CCN 330401
Practice locations
Addresses where Jaffer Ahmad is enrolled with Medicare (CMS data updated 2026-10-02).
- 301 E Main StBay Shore, NY 11706 (631) 968‑3636
- 50 Route 25aSmithtown, NY 11787 (631) 862‑3000
Group practices
Medicare enrollment lists Jaffer Ahmad as a member of these groups (CMS data updated 2026-10-02).
- North Shore-Lij Medical PC6,440 clinicians in the group
- Southwest Suffolk Medical PC199 clinicians in the group
Specialties
- Hospitalistprimary
- Internal Medicinealso
Other hospitalists in Bay Shore
Clinicians with the same Medicare primary specialty in Bay Shore, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1518427988 |
| 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