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Dr. John E. Greer, MD, PHD

Neurosurgery (Neurological Surgery Physician)

  • Medicare participating

At a glance

Years since graduation
13
In the NPI registry since
2013
Medicare patients seen, 2024
78

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. What an NPI is

Education and training

  • 2013Medical school: Virginia Commonwealth University, School of Medicine
  • 2013Registered with an NPI (national billing number; not a license date)

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

  • Neurological Surgery Physician primary
    VA license 0101268559

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

Map: Neurosurgery 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
78
Services billed
164
Patients’ average age
72
Most frequent Medicare services, 2023
ServiceTimesPatients
Established patient office or other outpatient visit, 10-19 minutes2624
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes2412
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes2222
Established patient office or other outpatient visit, 20-29 minutes1716
New patient office or other outpatient visit, 15-29 minutes1212

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
Chlorhexidine Gluconate
Other prescribers in Richmond, VA
15
Mupirocin
Other prescribers in Richmond, VA
14

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

Other Neurosurgery clinicians in Richmond

Sources

NPI registry (CMS NPPES, November 2026; record last updated September 13, 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 1790122646. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.