Mark Wilkinson, MD
NPI 1326235623 · Gastroenterology Physician · Lewes, DE
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Wilkinson, MD is a Gastroenterology Physician provider in Lewes, DE (NPI 1326235623).
Provider details
- NPI number
- 1326235623
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 390200000X (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,344 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) |
|---|---|---|
| Initial Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99221 | 230 | $81 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 191 | $127 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 157 | $93 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 78 | $241 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 76 | $87 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 202 | 198 |
| Pantoprazole Sodium | 133 | 50 |
| Omeprazole | 113 | 49 |
| Famotidine | 56 | 23 |
| Esomeprazole Magnesium | 31 | 11 |
| Linaclotidebrand: Linzess | 24 | — |
| Sucralfate | 23 | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$312 across 6 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
Registry dates
- Enumerated
- 2007-10-01
- Last updated
- 2014-02-06
Frequently asked questions
- What is Mark Wilkinson's NPI number?
- Mark Wilkinson's National Provider Identifier (NPI) is 1326235623, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Wilkinson's specialty?
- Mark Wilkinson is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Wilkinson located?
- Mark Wilkinson's practice location on file with NPPES is 400 Savannah Rd, Lewes, DE 19958-1499.
- What is Mark Wilkinson's phone number?
- The practice phone number listed in the NPPES registry for Mark Wilkinson is (302) 645-9325.
- Does Mark Wilkinson accept Medicare?
- Mark Wilkinson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Wilkinson's NPI active?
- Yes — Mark Wilkinson's NPI (1326235623) is active in the NPPES registry as of the last update on 2014-02-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.