Quick answers
- Which hospitals does William M. Atallah work at?
- Medicare's official clinician data lists William M. Atallah at 2 hospitals: Mount Sinai Beth Israel and Mount Sinai West. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William M. Atallah see patients?
- Medicare's clinician data lists 7 practice locations, including New York, NY and Elmhurst, NY. Call before your visit to confirm the address.
- What is William M. Atallah's specialty?
- Medicare lists Urology as the primary specialty.
- Does William M. Atallah accept Medicare assignment?
- Yes. Medicare's clinician data says William M. Atallah 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 William M. Atallah offer telehealth?
- Medicare's clinician data says William M. Atallah offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for William M. Atallah?
- (212) 844-8929, as listed in official Medicare / NPI Registry data.
- What is William M. Atallah's NPI number?
- 1285992842. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William M. Atallah works
Medicare's Facility Affiliation Data lists William M. Atallah at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mount Sinai Beth IsraelNew York, NY · Acute Care Hospital · closed, according to its website · CCN 330169
- Mount Sinai WestNew York, NY · Acute Care Hospital · CCN 330046
Practice locations
Addresses where William M. Atallah is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.
- 10 Union Sq ENew York, NY 10003 (212) 844‑8929
- 1000 10th AveNew York, NY 10019 (212) 781‑9697
- 1111 Amsterdam AveNew York, NY 10025 (212) 781‑9697
- 425 W 59th St, Urology Dept of Mount SinaiNew York, NY 10019 (212) 523‑3340
- 5 E 98th StNew York, NY 10029 (212) 241‑0045
Group practices
Medicare enrollment lists William M. Atallah as a member of these groups (CMS data updated 2026-10-02).
- Icahn School of Medicine at Mount Sinai2,843 clinicians in the group
- Icahn School of Medicine at Mount Sinai316 clinicians in the group
Specialties
- Urologyprimary
Other urologists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2012 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1285992842 |
| 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