Armistead Williams, M.D.
NPI 1073580908 · Neurology Physician · New York, NY
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Armistead Williams, M.D. is a Neurology Physician provider in New York, NY (NPI 1073580908).
Provider details
- NPI number
- 1073580908
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 238108 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,528 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Administration of Chemotherapy Into Vein, Each Additional Hour96415 | 607 | $30 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, Each Additional Hour96366 | 599 | $22 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 385 | $142 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 284 | $195 |
| Injection of Drug Or Substance Into Vein96374 | 205 | $40 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 178 | $71 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 48 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Dalfampridinebrand: Dalfampridine Er | 202 | 32 |
| Gabapentin | 147 | 39 |
| Baclofen | 134 | 35 |
| Mycophenolate Mofetil | 125 | 33 |
| Clonazepam | 83 | 14 |
| Pregabalin | 81 | 17 |
| Duloxetine Hcl | 66 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-28
- Last updated
- 2012-09-24
Frequently asked questions
- What is Armistead Williams's NPI number?
- Armistead Williams's National Provider Identifier (NPI) is 1073580908, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Armistead Williams's specialty?
- Armistead Williams is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Armistead Williams located?
- Armistead Williams's practice location on file with NPPES is 521 W 57th St, New York, NY 10019-2901.
- What is Armistead Williams's phone number?
- The practice phone number listed in the NPPES registry for Armistead Williams is (212) 265-8070.
- Does Armistead Williams accept Medicare?
- Armistead Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Armistead Williams's NPI active?
- Yes — Armistead Williams's NPI (1073580908) is active in the NPPES registry as of the last update on 2012-09-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.