Doctor profile · Federal record
Dr. Aston Williams, MD
Gastroenterology Physician (CMS: Internal Medicine) · General Practice Physician · Buffalo, NY
- NPI 1558423921
- Accepts Medicare
- 51 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
2804 Main St
Buffalo, NY 142141706
(716) 832-1776
Credentials & registration
- NPI registered
- December 2006 — 20 yrs on file
- Profile last updated
- June 17, 2011
- Year of graduation
- 1975 — 51 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- New York #158446
- Medicaid
- NY #01028555
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1558423921. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
22
Distinct HCPCS
1
Medicare allowed
$1,180
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99441 |
Telephone medical discussion with physician, 5-10 minutes | 22 | 16 | $54 |
In context: peer comparison
Among 9 peers in Buffalo Gastroenterology Physician, average services per provider: 45. This provider delivers 0.5× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
424
Patients
71
Total drug cost
$40,618
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Dexlansoprazole Dr (Dexlansoprazole) | Brand | 59 | 11 | $17,326 |
| Omeprazole | Generic | 53 | 13 | $915 |
| Dicyclomine Hcl | Generic | 50 | 13 | $969 |
| Hydrochlorothiazide | Generic | 49 | 14 | $347 |
| Gabapentin | Generic | 29 | 0 | $665 |
| Amlodipine Besylate | Generic | 27 | 0 | $481 |
| Atorvastatin Calcium | Generic | 22 | 0 | $217 |
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 21 | 20 | $380 |
| Azithromycin | Generic | 20 | 0 | $59 |
| Ondansetron Hcl | Generic | 18 | 0 | $706 |
Frequently asked questions
What is Dr. Aston Williams's medical specialty?
Dr. Aston Williams practices Gastroenterology Physician in Buffalo, NY.
Where does Dr. Aston Williams practice?
Dr. Aston Williams practices at 2804 Main St, Buffalo, NY 142141706. Office phone: 7168321776.
What is Dr. Aston Williams's NPI?
Dr. Aston Williams's National Provider Identifier (NPI) is 1558423921, issued by NPPES.
Does Dr. Aston Williams accept Medicare assignment?
Yes. Dr. Aston Williams accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Aston Williams commonly perform?
Top Medicare-reported procedures in 2023: Telephone medical discussion with physician (HCPCS 99441). Source: CMS Medicare Physician & Other Practitioners file.