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Dr. Douglas C. Johnson, MD

Pulmonology (Pulmonary Disease Physician)

  • Medicare participating

At a glance

Medical school
Harvard Medical School (1976)
Years since graduation
50
In the NPI registry since
2005
Medicare patients seen, 2024
779

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

  • 1976Medical school: Harvard Medical School
  • 2005Registered 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

  • Pulmonary Disease Physician primary
    MA license 43956

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

Map: Pulmonology 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
779
Services billed
1,782
Patients’ average age
71
Most frequent Medicare services, 2023
ServiceTimesPatients
Test to examine how well the lungs exchange gases435423
Test to measure expiratory airflow and volume changes before and after medication administration340336
Test to determine lung volumes using sensors284278
Test to determine lung volumes using gas dilution or washout154152
Test to measure rate of airflow128123
Sleep study including heart rate, breathing, airflow, and effort9998
Sleep study in sleep lab with continuous airway pressure (6 years or older)6562
Test for exercise-induced lung stress6562
Telephone medical discussion with physician, 21-30 minutes5139
Established patient office or other outpatient visit, 40-54 minutes4939

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.

Other Pulmonology clinicians in Springfield

Sources

NPI registry (CMS NPPES, November 2026; record last updated December 22, 2017), 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 1710969738. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.