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Dr. Timothy A. Johnson, M.D.

Hematology & Oncology (Hematology & Oncology Physician)

271 Carew Street
Springfield, MA 01104

Who else practices at this address →

Hampden County includes primary care (1% of residents) shortage areas. About shortage areas

Call (413) 748-7370

  • Medicare participating

At a glance

Years since graduation
34
In the NPI registry since
2005
Medicare patients seen, 2024
366

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

  • 1992Medical school: University of Connecticut School of Medicine
  • 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

  • Hematology & Oncology Physician primary
    MA license 220236

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

Map: Hematology & 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
366
Services billed
945
Patients’ average age
74
Most frequent Medicare services, 2023
ServiceTimesPatients
Established patient office or other outpatient visit, 30-39 minutes413146
Established patient office or other outpatient visit, 20-29 minutes391254
Established patient office or other outpatient visit, 40-54 minutes21763
New patient office or other outpatient visit, 60-74 minutes6262
Telephone medical discussion with physician, 21-30 minutes2212
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes1817
Telephone medical discussion with physician, 11-20 minutes1111

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 Hematology & Oncology clinicians in Springfield

Sources

NPI registry (CMS NPPES, November 2026; record last updated April 10, 2014), 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 1801879762. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.