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Dr. Gregory C. Henkelmann, MD

Radiation Oncology (Radiation Oncology Physician)

4950 Essen Lane
Baton Rouge, LA 70809

Who else practices at this address →

East Baton Rouge Parish includes primary care (46% of residents) shortage areas. About shortage areas

Call (225) 215-1136

  • Medicare participating

At a glance

Years since graduation
42
In the NPI registry since
2006
Medicare patients seen, 2024
595

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

  • 1984Medical school: Loma Linda University School of Medicine
  • 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

  • Radiation Oncology Physician primary
    LA license 07671R

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

Map: Radiation 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
595
Services billed
21,911
Patients’ average age
74
Most frequent Medicare services, 2023
ServiceTimesPatients
Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml17,361151
Injection, gadobutrol, 0.1 ml1,25016
Ct guidance for insertion of radiation therapy fields987169
Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session782134
Nuclear medicine study from skull base to mid-thigh with ct scan211173
Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries204167
Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 6-10 mev18426
Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 11-19 mev17532
Continuing radiation therapy consultation per week16168
Ct scan of chest with contrast146123

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.

Medicare prescriptions

Most prescribed drugs, Medicare Part D 2024
DrugPrescriptions
Hydrocodone-Acetaminophen (hydrocodone/acetaminophen)
Other prescribers in Baton Rouge, LA
33
Morphine Sulfate Er (morphine sulfate)
Other prescribers in Baton Rouge, LA
11

Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.

Other Radiation Oncology clinicians in Baton Rouge

Sources

NPI registry (CMS NPPES, November 2026; record last updated November 23, 2009), 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 1639264237. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.