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Dr. Kai C. Johnson, MD

Medical Oncology (Medical Oncology Physician)

  • Medicare participating

At a glance

Years since graduation
9
In the NPI registry since
2017
Medicare patients seen, 2024
138

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

  • 2017Medical school: University of Kentucky College of Medicine
  • 2017Registered 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

  • Medical Oncology Physician primary
    OH license 35.145937

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

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
138
Services billed
359
Patients’ average age
70
Most frequent Medicare services, 2023
ServiceTimesPatients
Established patient office or other outpatient visit, 40-54 minutes7438
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes6624
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes4213
New patient office or other outpatient visit, 60-74 minutes3434
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes2222
Established patient office or other outpatient visit, 30-39 minutes2221

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

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

Industry-funded research

Named as a principal investigator on 1 industry-funded study in 2025, from 1 company. The companies reported $124,158 in research payments for these studies, mostly to the institutions running them.

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 Medical Oncology clinicians in Columbus

Sources

NPI registry (CMS NPPES, November 2026; record last updated January 29, 2026), 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 1538689682. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.