Every certified lab in Massachusetts by type, certificate and yearly tests, for all payers. Official US government data, as of April 2026.
By yearly tests reported
Listed and large private lab companies
Every US lab with a federal lab certificate in Massachusetts, for all payers (not only Medicare), and the lab tests billed to Original Medicare.
Certified labs
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Massachusetts
Independent and reference
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- tests a year reported
Physician office labs
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Hospital labs: -
Medicare lab tests
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- paid; - by independent labs
Number of labs and the yearly tests reported by labs that run more than simple tests
Independent and reference labs: labs by the number of tests they run in a year (reported or estimated)
Active labs at the end of each year, by segment
Waived labs run only simple tests; compliance and accredited labs are inspected
Tests billed to Original Medicare (Part B), all states
Tests and Medicare payments by kind of test
Official US government data: the federal lab certificate records (updated every quarter) and Original Medicare claims of labs, doctors and suppliers (yearly). Segments are our grouping: independent and reference labs include every lab of a listed lab company; physician office labs bill under the doctor. Tests reported by labs are yearly totals for labs that run more than simple tests. Medicare tests that hospitals bill for their own outpatients are paid under a different part of Medicare and are not included. Lab test codes are shown by number with their category, because the official code descriptions are licensed.
The labs of Massachusetts, from reference labs to the labs in doctors' offices, pharmacies and nursing homes, with their certificates and yearly test volumes, from official US government data updated every quarter.
Massachusetts has 5,384 labs with an active federal lab certificate (as of April 2026): 1,872 physician office labs, 133 independent and reference labs, 198 hospital labs and 3,181 other labs. The most common places with a lab are physician office (1,873), other (884), school or student health (442), nursing home (364).
By yearly tests reported: Quest Diagnostics, LLC in Marlborough (16.6M tests), Mgh Department of Pathology in Boston (10.3M tests), Boston Medical Center / Dept of Lab Medicine in Boston (9.0M tests), Laboratory Corporation of America Holdings in Holyoke (7.5M tests).
Quest Diagnostics (19 labs), Labcorp (4 labs), Natera (1 lab).