Mark Case, M.D.
Family Medicine Physician · Middletown, DE
Mark Case, M.D. is a family medicine physician with a practice address in Middletown, Delaware, and NPI 1730137019, issued on May 5, 2006. Check the license (Delaware C1-0004730, as entered in NPPES) on the Delaware Board of Medical Licensure and Discipline; the Medicare figures below come from public CMS files.
- Name
- Mark Case
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- C1-0004730 DE
Self-reported in NPPES; status is on the state search - Practice location
- 124 Sleepy Hollow Dr Ste 200, Middletown, DE 19709
- Phone
- (302) 449-1710
- Enumerated
- May 5, 2006
- Record last updated
- Mar 10, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (302) 449-1717
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 518 in Delaware → Look up another NPI →
Verify Mark Case 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 C1-0004730Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Most of these Medicare Part D claims are vaccines, 95% of the cost of the top drugs
6,330 Medicare Part D claims for 2,503 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 53% of claims.
Most prescribed
Pharmacies often give vaccines under a standing order that names one clinician, and CMS counts every such claim under that clinician's NPI. These claims are therefore not a measure of this clinician's own prescribing.
- Arexvy1,223 claims
- Shingrix1,024 claims
- Boostrix Tdap362 claims
- Atorvastatin Calcium213 claims
- Abrysvo178 claims
- Amlodipine Besylate140 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.
Mark Case among 518 family medicine physician records in Delaware
Mark Case, M.D. is one of 518 family medicine physician records with a practice address in Delaware. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 49% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2020 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Delaware practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 family medicine physician records list a practice address in Middletown
They are 21 of the 607 NPPES records with a practice address in Middletown, and 518 family medicine physician records in Delaware.
All 518 in Delaware → Every provider in Middletown → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Sameh Basta, M.DMiddletown, DE 197091922414978
- Josefina Luisa Cancino, MDMiddletown, DE 197091154404143
- John Cellucci, MDMiddletown, DE 197091740239235
- Laxmichand Dedhia, M.D.Middletown, DE 197091508845132
- Stephen Duggan, DOMiddletown, DE 197091225014871
- Mhaidi Elmedkhar, M.D.Middletown, DE 197091760461859
- Beth Fisher, DOMiddletown, DE 197091689651747
- Ann Johnson, MDMiddletown, DE 197091417119348
Common questions
What is Mark Case, M.D.'s NPI number?
Mark Case, M.D.'s National Provider Identifier (NPI) is 1730137019, issued on May 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Case, M.D. located?
The NPPES record lists a practice address at 124 Sleepy Hollow Dr Ste 200, Middletown, DE, 19709. Phone: (302) 449-1710. Providers update this record themselves, so call before visiting.
How can I verify Mark Case, M.D.'s license?
NPPES lists Delaware license number C1-0004730, 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 Case, M.D. prescribe under Medicare Part D?
In 2024, Mark Case, M.D. had 6,330 Medicare Part D claims for 2,503 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.