Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Ismanie Guillaume, MD

Individual provider Internal Medicine Physician · NPI 1326571126

Dr. Ismanie Guillaume, MD practises Internal Medicine in Newark, Delaware. Graduated from George Washington University School of Medicine in 2017, 9 years ago. Practices with Union Hospital of Cecil County, a 283-clinician group and accepts Medicare assignment. Licensed in Delaware.

Years since qualifying
9
Trained at
George Washington University School of Medicine
Licensed in
DE
In the registry since
2017
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

4755 Ogletown Stanton Rd
Newark, DE 19718-2200
Phone: (908) 977-7695
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence C1-0024308 (DE)
Pediatrics Physician Taxonomy 208000000X · Licence C1-0024308 (DE)

Record details

NPI number1326571126
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 7, 2017
Last updated in NPPESJune 25, 2021
Certification dateJune 25, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolGEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2017 (9 years in practice)
Group practice Union Hospital Of Cecil County — 283 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients336
Services billed 764 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Union Hospital of Cecil County

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 283 clinicians in the practice; 12 are shown here.

Other providers in Newark