Quick answers
- Which hospitals does Mohammad Athar work at?
- Medicare's official clinician data lists Mohammad Athar at 5 hospitals: John T Mather Memorial Hospital of Port Jefferson, North Shore University Hospital, Ns/Lij HS Southside Hospital, Peconic Bay Medical Center and St Catherine of Siena Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mohammad Athar see patients?
- Medicare's clinician data lists 2 practice locations, including Stony Brook, NY and Flushing, NY. Call before your visit to confirm the address.
- What is Mohammad Athar's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty, and also Sports Medicine.
- Does Mohammad Athar accept Medicare assignment?
- Yes. Medicare's clinician data says Mohammad Athar 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 Mohammad Athar offer telehealth?
- Medicare's clinician data says Mohammad Athar offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mohammad Athar?
- (631) 981-2663, as listed in official Medicare / NPI Registry data.
- What is Mohammad Athar's NPI number?
- 1689301368. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mohammad Athar works
Medicare's Facility Affiliation Data lists Mohammad Athar at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- John T Mather Memorial Hospital of Port JeffersonPort Jefferson, NY · Acute Care Hospital · CCN 330185
- North Shore University HospitalManhasset, NY · Acute Care Hospital · CCN 330106
- Ns/Lij HS Southside HospitalBay Shore, NY · Acute Care Hospital · CCN 330043
- Peconic Bay Medical CenterRiverhead, NY · Acute Care Hospital · CCN 330107
- St Catherine of Siena HospitalSmithtown, NY · Acute Care Hospital · CCN 330401
Practice locations
Addresses where Mohammad Athar is enrolled with Medicare (CMS data updated 2026-10-02).
- 2500 Nesconset HwyStony Brook, NY 11790 (631) 981‑2663
- 5221 Little Neck PkwyFlushing, NY 11362 (631) 987‑2663
Group practices
Medicare enrollment lists Mohammad Athar as a member of this group (CMS data updated 2026-10-02).
- Aa Medical PC6 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
- Sports Medicinealso
Other orthopedic surgeons in Stony Brook
Clinicians with the same Medicare primary specialty in Stony Brook, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2015 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1689301368 |
| 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