Omar Mahmoud, MD
Internal Medicine Physician · Lewes, DE
Omar Mahmoud, MD is an internal medicine physician with a practice address in Lewes, Delaware, and NPI 1609362748, issued on Jul 2, 2018. Check the license (Delaware C1-0026494, as entered in NPPES) on the Delaware Board of Medical Licensure and Discipline; the Medicare figures below come from public CMS files.
- Name
- Omar Mahmoud
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- C1-0026494 DE
Self-reported in NPPES; status is on the state search - Practice location
- 1535 Savannah RD, Lewes, DE 19958
- Phone
- (302) 645-3232
- Enumerated
- Jul 2, 2018
- Record last updated
- Jan 21, 2026
- Fax
- (888) 987-4308
- Medicare enrollment
- Enrolled (PECOS I20250304001378); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 600 in Delaware → Look up another NPI →
Also registered at 1535 Savannah RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Omar Mahmoud 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 C1-0026494Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average internal medicine physician in 2024
224 Medicare Part D claims for 87 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 49% of claims.
Most prescribed
- Albuterol Sulfate Hfa29 claims
- Montelukast Sodium27 claims
- Trelegy Ellipta24 claims
- Symbicort14 claims
- Prednisone11 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: $422.76
11 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 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).
Omar Mahmoud among 600 internal medicine physician records in Delaware
Omar Mahmoud, MD is one of 600 internal medicine physician records with a practice address in Delaware. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 70% of them.
- NPI issued2018 · 70% of these records are older, 28% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2017 · median 2008 among the 414 with a school on file
- Record last updated2026 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Delaware practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
43 internal medicine physician records list a practice address in Lewes
They are 43 of the 1,696 NPPES records with a practice address in Lewes, and 600 internal medicine physician records in Delaware.
All 600 in Delaware → Every provider in Lewes → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Anthony Buonanno, M.D.Lewes, DE 199581609873413
- Linda Choy, M.D.Lewes, DE 199581437104817
- Julie Holmon, M.D.Lewes, DE 199581871580696
- Zeina Jeha, MDLewes, DE 199581669473641
- Afshin Khams, MDLewes, DE 199581669440194
- Imtiaz Khokhar, M.D.Lewes, DE 199581629075387
- Bhaskar Palekar, M.D.Lewes, DE 199581750329322
- Gary Raffel, D.O.Lewes, DE 199581396747432
Common questions
What is Omar Mahmoud, MD's NPI number?
Omar Mahmoud, MD's National Provider Identifier (NPI) is 1609362748, issued on Jul 2, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Omar Mahmoud, MD located?
The NPPES record lists a practice address at 1535 Savannah RD, Lewes, DE, 19958. Phone: (302) 645-3232. Providers update this record themselves, so call before visiting.
How can I verify Omar Mahmoud, MD's license?
NPPES lists Delaware license number C1-0026494, 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 Omar Mahmoud, MD prescribe under Medicare Part D?
In 2024, Omar Mahmoud, MD had 224 Medicare Part D claims for 87 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.