PROVIDER ACCESS GAP · STATE
oncologists per 100,000 in Massachusetts
6.25 active oncologists per 100,000 residents — ranked 1 of 51 U.S. states + DC.
oncologists per 100,000 residents
6.25
446 active oncologists · 7,136,171 residents · Massachusetts
- National rank
- 1 / 51
- Percentile
- 100th
- Underserved threshold
- 3 / 100k
- Quartile
- Q1
top quartile (well-supplied)
above
Comparable areas
Three states whose oncologist per-100k density is closest to Massachusetts's — useful for benchmarking.
- District of Columbiarank 24.70 / 100k
- Marylandrank 34.09 / 100k
- Connecticutrank 43.43 / 100k
Citeable result
Plain-text citation block — paste verbatim into a brief, story, or report.
Massachusetts has 446 active oncologists (6.25 per 100,000 residents) — ranked 1 of 51 U.S. states + DC. Source: CMS NPPES NPI Registry + U.S. Census Bureau, snapshot 2026-05-06. Threshold for "underserved" in the parent study: 3 per 100,000. Citation: Fonteum Research, /research/oncology-supply-by-state-2026.
Source provenance
- U.S. Centers for Medicare & Medicaid Services NPI Registry (NPPES) — public API
- U.S. Census Bureau Population Estimates Program, 2024 Vintage (V2024)
- Snapshot date: 2026-05-06
Limitations
- This figure measures density (per-capita supply), not access. Drive time, appointment availability, insurance acceptance, and wait times are not modeled here.
- The CMS NPPES registry counts NPI-1 individual providers with the relevant taxonomy code. It does not capture PA-led or NP-led practices that operate under a different taxonomy.
- NPPES does not publish a county-level field of practice in its public API. County- and ZIP-scoped queries surface state-level density, with the geographic context preserved on this page.
- Population is the U.S. Census Bureau 2024 vintage estimate. Population shifts post-2024 are not yet reflected.
- The "underserved" threshold is the parent study's transparent baseline cutoff; it is not a regulatory or clinical definition. See the parent study for the rationale.