Quick answers
- Which hospitals does Armistead Williams work at?
- Medicare's official clinician data lists Armistead Williams at 1 hospital: Montefiore St Luke's Cornwall. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Armistead Williams see patients?
- Medicare's clinician data lists 1 practice location in New York, NY. Call before your visit to confirm the address.
- What is Armistead Williams's specialty?
- Medicare lists Nephrology as the primary specialty.
- Does Armistead Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Armistead Williams 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 Armistead Williams offer telehealth?
- Medicare's clinician data says Armistead Williams offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Armistead Williams?
- (212) 265-8070, as listed in official Medicare / NPI Registry data.
- What is Armistead Williams's NPI number?
- 1073580908. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Armistead Williams works
Medicare's Facility Affiliation Data lists Armistead Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Montefiore St Luke's CornwallNewburgh, NY · Acute Care Hospital · CCN 330264
Practice locations
Addresses where Armistead Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 521 W 57th St, Fl 4New York, NY 10019 (212) 265‑8070
Group practices
Medicare enrollment lists Armistead Williams as a member of this group (CMS data updated 2026-10-02).
- International Multiple Sclerosis Management Practice, PC8 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Virginia School Of Medicine |
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1073580908 |
| 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