Allen Williams, M.D.
NPI 1720062680 · Anesthesiology Physician · Smithtown, NY
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Allen Williams, M.D. is a Anesthesiology Physician provider in Smithtown, NY (NPI 1720062680).
Provider details
- NPI number
- 1720062680
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 223882 (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
114 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) |
|---|---|---|
| Anesthesia for Lens Surgery00142 | 23 | $145 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 21 | $157 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 19 | $151 |
| Anesthesia for Other Procedure on Large Bowel Using an Endoscope00811 | 19 | $148 |
| Anesthesia for Other Procedure on Large Bowel Using an Endoscope00811 | 16 | $146 |
| Anesthesia for Procedure on Small and Large Bowel Using an Endoscope00813 | 16 | $186 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-05
- Last updated
- 2014-03-18
Frequently asked questions
- What is Allen Williams's NPI number?
- Allen Williams's National Provider Identifier (NPI) is 1720062680, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Allen Williams's specialty?
- Allen Williams is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Allen Williams located?
- Allen Williams's practice location on file with NPPES is 415 W Main St, Smithtown, NY 11787-2612.
- What is Allen Williams's phone number?
- The practice phone number listed in the NPPES registry for Allen Williams is (631) 521-7341.
- Does Allen Williams accept Medicare?
- Allen Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Allen Williams's NPI active?
- Yes — Allen Williams's NPI (1720062680) is active in the NPPES registry as of the last update on 2014-03-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.