Marc C. Tarsillo, MD
Emergency Medicine Physician · Dover, DE
Marc C. Tarsillo, MD is an emergency medicine physician with a practice address in Dover, Delaware, and NPI 1962964486, issued on Apr 3, 2019. Check the license (Delaware C1-0025894, as entered in NPPES) on the Delaware Board of Medical Licensure and Discipline; the Medicare figures below come from public CMS files.
- Name
- Marc C. Tarsillo
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- C1-0025894 DE
Self-reported in NPPES; status is on the state search - Practice location
- 640 S State St, Dover, DE 19901
- Phone
- (302) 674-4700
- Enumerated
- Apr 3, 2019
- Record last updated
- Jun 12, 2023
- Fax
- (302) 735-3845
- Medicare enrollment
- Enrolled (PECOS I20230824002257); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 243 in Delaware → Look up another NPI →
Also registered at 640 S State St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kelly Abbrescia, DOEmergency Medicine Physician1992740625
- Sarah Abdallah, MDStudent in an Organized Health Care Education/Training Program1265374789
- Joseph Raphael Ablaza, M.D.Internal Medicine Physician1366892291
- Anastazia Acevedo, PA-CPhysician Assistant1831495282
- Aashish AcharyaInternal Medicine Physician1912523424
- Denita Adams, CRNACertified Registered Nurse Anesthetist1427233964
Verify Marc C. Tarsillo 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 C1-0025894Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% fewer Medicare Part D claims than the average emergency medicine physician in 2024
156 Medicare Part D claims for 108 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Ibuprofen23 claims
- Amoxicillin-Clavulanate Potass14 claims
- Cephalexin11 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.
Bills Medicare through one group practice
- Bayhealth Emergency Physicians LLCDover, DE
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marc C. Tarsillo among 243 emergency medicine physician records in Delaware
Marc C. Tarsillo, MD is one of 243 emergency 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 2019, is newer than 70% of them.
- NPI issued2019 · 70% of these records are older, 27% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated2019 · median 2010 among the 123 with a school on file
- Record last updated2023 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Delaware practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
59 emergency medicine physician records list a practice address in Dover
They are 59 of the 2,137 NPPES records with a practice address in Dover, and 243 emergency medicine physician records in Delaware.
All 243 in Delaware → Every provider in Dover → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Kelly Abbrescia, DODover, DE 199011992740625
- Andrew Aswegan, MDDover, DE 199011548227812
- Robert Baeder, D.O.Dover, DE 199011588799662
- Philliph Bialecki, M.D.Dover, DE 199011902884463
- Susan Brennan, D.O.Dover, DE 199011952328411
- Robert Fumento, MDDover, DE 199011740254002
- Rhonda Gill, M.D.Dover, DE 199011881611341
- John Gusdon, MDDover, DE 199011093874471
Common questions
What is Marc C. Tarsillo, MD's NPI number?
Marc C. Tarsillo, MD's National Provider Identifier (NPI) is 1962964486, issued on Apr 3, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Marc C. Tarsillo, MD located?
The NPPES record lists a practice address at 640 S State St, Dover, DE, 19901. Phone: (302) 674-4700. Providers update this record themselves, so call before visiting.
How can I verify Marc C. Tarsillo, MD's license?
NPPES lists Delaware license number C1-0025894, 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 Marc C. Tarsillo, MD prescribe under Medicare Part D?
In 2024, Marc C. Tarsillo, MD had 156 Medicare Part D claims for 108 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.