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Dr. Robert G. Mennel, MD

Medical Oncology (Medical Oncology Physician)

  • Medicare participating

At a glance

Years since graduation
56
In the NPI registry since
2006
Medicare patients seen, 2024
67

Licensed in Texas since 1979, according to the Texas Medical Board. 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

  • 1970Medical school: Perelman School of Med at the University of Pennsylvania
  • 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier

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

  • Medical Oncology Physician primary
    TX license F6039 (first issued 1979; active)

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

Map: Medical Oncology per capita by county →

Where they work

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
67
Services billed
10,358
Patients’ average age
72
Most frequent Medicare services, 2023
ServiceTimesPatients
Injection, iron sucrose, 1 mg9,80026
Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use)9,69016
Injection, gadobutrol, 0.1 ml3,20036
Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml2,95132
Injection, dexamethasone sodium phosphate, 1 mg50019
Injection, granisetron hydrochloride, 100 mcg23012
Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less5942
Infusion into a vein for therapy, prevention, or diagnosis, additional sequential infusion, 1 hour or less5818
Administration of chemotherapy into vein, 1 hour or less5127
Blood test, comprehensive group of blood chemicals4341

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.

Other Medical Oncology clinicians in Dallas

Sources

NPI registry (CMS NPPES, November 2026; record last updated October 26, 2011), 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 1265475677. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.