Mark Nathaniel Wilkinson, MD
Gastroenterology Physician · Lewes, DE
Mark Nathaniel Wilkinson, MD is a gastroenterology physician with a practice address in Lewes, Delaware, and NPI 1326235623, issued on Oct 1, 2007. Check the license (Delaware C1-0009726, as entered in NPPES) on the Delaware Board of Medical Licensure and Discipline; the Medicare figures below come from public CMS files.
- Name
- Mark Nathaniel Wilkinson
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- C1-0009726 DE
390200000X NY
Self-reported in NPPES; status is on the state search - Practice location
- 400 Savannah RD, Lewes, DE 19958
- Phone
- (302) 645-9325
- Enumerated
- Oct 1, 2007
- Record last updated
- Feb 6, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (302) 645-5214
- Medicare enrollment
- Enrolled (PECOS I20111219000173); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 47 in Delaware → Look up another NPI →
Also registered at 400 Savannah RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Vanessa AdamsNurse Practitioner1093856320
- Harry Anagnostakos, DOGastroenterology Physician1124036017
- Ercilia Arias, M.D.Pulmonary Disease Physician1720032675
- Terry Hess, NNP-BCNeonatal Nurse Practitioner1417196445
- Scott Olewiler, M.D.Infectious Disease Physician1205881893
- Paolo Peghini, MDGastroenterology Physician1558379446
Verify Mark Nathaniel Wilkinson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersDelaware Board of Medical Licensure and Discipline
Search for license C1-0009726Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% more Medicare Part D claims than the average gastroenterology physician in 2024
888 Medicare Part D claims for 478 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Sod Sulf-Potass Sulf-Mag Sulf202 claims
- Pantoprazole Sodium133 claims
- Omeprazole113 claims
- Famotidine56 claims
- Esomeprazole Magnesium31 claims
- Linzess24 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $311.85
6 payments; by number, the most common kind was food and beverage; the largest payer was Olympus America Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Beebe Physician Network Inc.Lewes, DE
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Nathaniel Wilkinson among 47 gastroenterology physician records in Delaware
Mark Nathaniel Wilkinson, MD is one of 47 gastroenterology physician records with a practice address in Delaware. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 43% of them.
- NPI issued2007 · 43% of these records are older, 51% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2003 · median 2004 among the 34 with a school on file
- Record last updated2014 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Delaware practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Delaware
There are 47 gastroenterology physician records in Delaware.
All 47 in Delaware → Every provider in Lewes → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Sujay AlvencarLewes, DE 199581508429473
- Harry Anagnostakos, DOLewes, DE 199581124036017
- Geoffrey Braden, M.D.Lewes, DE 199581275597809
- Richard Caruso, MDLewes, DE 199581548252265
- Scott Clark, MDLewes, DE 199581538119979
- Robert Deckmann, MDLewes, DE 199581114935004
- Heather Gibbs, M.D.Lewes, DE 199581275895625
- Shaina Lynch, D.O.Lewes, DE 199581235575036
Common questions
What is Mark Nathaniel Wilkinson, MD's NPI number?
Mark Nathaniel Wilkinson, MD's National Provider Identifier (NPI) is 1326235623, issued on Oct 1, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark Nathaniel Wilkinson, MD located?
The NPPES record lists a practice address at 400 Savannah RD, Lewes, DE, 19958. Phone: (302) 645-9325. Providers update this record themselves, so call before visiting.
How can I verify Mark Nathaniel Wilkinson, MD's license?
NPPES lists Delaware license number C1-0009726, as entered by the provider. Search the Delaware Board of Medical Licensure and Discipline at https://delpros.delaware.gov/OH_VerifyLicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Nathaniel Wilkinson, MD prescribe under Medicare Part D?
In 2024, Mark Nathaniel Wilkinson, MD had 888 Medicare Part D claims for 478 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.