Skip to main content

Dr. Mark E. Borowsky, MD

Gynecologic Oncology (Gynecologic Oncology Physician)

  • Medicare participating

At a glance

Years since graduation
33
In the NPI registry since
2005
Medicare patients seen, 2024
136

Licensed in Delaware since 1997, according to the Delaware Division of Professional Regulation. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.

The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is

Education and training

  • 2005Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier

Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).

Specialties and state licenses

  • Gynecologic Oncology Physician primary
    DE license C10005136 (first issued 1997; expired)

As reported to the NPI registry. To confirm a license is current, check the state medical board.

Map: Gynecologic Oncology per capita by county →

Where they work

Hospitals

Medical groups

Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.

Medicare patients and services

Medicare patients, 2024
136
Services billed
391
Patients’ average age
73
Most frequent Medicare services, 2023
ServiceTimesPatients
Established patient office or other outpatient visit, 20-29 minutes7249
Established patient office or other outpatient visit, 30-39 minutes5036
Established patient office or other outpatient visit, 40-54 minutes3920
New patient office or other outpatient visit, 45-59 minutes3434
New patient office or other outpatient visit, 30-44 minutes1717
New patient office or other outpatient visit, 60-74 minutes1616
Removal of uterus, tubes, and/or ovaries through abdomen using an endoscope, 250.0 g or less1414

Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.

Payments from drug and device companies

In 2025, 5 companies reported 11 payments worth $201 in total to this clinician.

By type
Food and Beverage$201

From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.

Who received the most in Delaware →

Industry-funded research

Named as a principal investigator on 1 industry-funded study in 2025, from 1 company. The companies reported $27,650 in research payments for these studies, mostly to the institutions running them.

  • A Phase 3, Randomized, Placebo-Controlled, Double-Blind, Multicenter Trial of Selinexor in Maintenance Therapy After Systemic Therapy for Patients With p53 Wild-Type, Advanced or Recurrent Endometrial Carcinoma
    Karyopharm Therapeutics Inc.

From CMS Open Payments research payments, where companies name up to five principal investigators per payment. Research payments usually go to hospitals, universities and research sites, not to the investigator personally. A payment is not evidence of wrongdoing.

Other Gynecologic Oncology clinicians in Newark

Sources

NPI registry (CMS NPPES, November 2026; record last updated January 22, 2021), Medicare Care Compare, Medicare Physician & Other Practitioners (2024), Medicare Part D Prescribers (2024) and Open Payments (2025). Information is self-reported or billed data and may be out of date; call before visiting.

NPI 1871570044. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.