Ernest Williams, MD
NPI 1588623292 · Gastroenterology Physician · Oxford, MS
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ernest Williams, MD is a Gastroenterology Physician provider in Oxford, MS (NPI 1588623292).
Provider details
- NPI number
- 1588623292
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 17218 (MS)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
891 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 197 | $123 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 163 | $109 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 108 | $244 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 92 | $168 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 79 | $158 |
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 |
|---|---|---|
| Pantoprazole Sodium | 554 | 187 |
| Famotidine | 304 | 84 |
| Dicyclomine Hcl | 211 | 69 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 193 | 191 |
| Omeprazole | 164 | 55 |
| Glycopyrrolate | 115 | 36 |
| Sucralfate | 108 | 38 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$16,442 across 94 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 825 W Monroe StGrenada, MS 38901-5042Phone: (662) 234-9888
- 200 State Highway 30 WNew Albany, MS 38652-3112Phone: (662) 234-9888
Registry dates
- Enumerated
- 2006-03-21
- Last updated
- 2026-02-16
- Certified
- 2026-02-16
Frequently asked questions
- What is Ernest Williams's NPI number?
- Ernest Williams's National Provider Identifier (NPI) is 1588623292, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ernest Williams's specialty?
- Ernest Williams is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Ernest Williams located?
- Ernest Williams's practice location on file with NPPES is 1208 Office Park Dr, Oxford, MS 38655-3597.
- What is Ernest Williams's phone number?
- The practice phone number listed in the NPPES registry for Ernest Williams is (662) 234-9888.
- Does Ernest Williams accept Medicare?
- Ernest Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ernest Williams's NPI active?
- Yes — Ernest Williams's NPI (1588623292) is active in the NPPES registry as of the last update on 2026-02-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.