NPPES file of Aug 9, 2026

Find an organization's NPI

342 active organization NPIs are registered under names beginning "Quest Diagnostics". Each location can bill under its own NPI, so add the city to find the one you need.

301 to 325 of 342, exact name first

  1. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Dorchester, MA · issued Apr 30, 2013

    1255776647
  2. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · East Boston, MA · issued Apr 5, 2013

    1588907760
  3. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · East Boston, MA · issued Apr 5, 2013

    1043553225
  4. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Holden, MA · issued Mar 21, 2014

    1225455801
  5. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Hyannis, MA · issued Apr 1, 2009

    1518109818
  6. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Hyannis, MA · issued Jun 16, 2018

    1902390628
  7. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Leominster, MA · issued Oct 18, 2012

    1104179860
  8. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Marlborough, MA · issued Jan 7, 2013

    1194062448
  9. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Mattapan, MA · issued Apr 30, 2013

    1356786735
  10. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Milford, MA · issued May 15, 2013

    1164868303
  11. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Milford, MA · issued Apr 19, 2018

    1407343056
  12. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Norfolk, MA · issued Nov 17, 2010

    1134421522
  13. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Provincetown, MA · issued Jan 3, 2012

    1588934947
  14. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Shrewsbury, MA · issued Jul 18, 2006

    1801814868
  15. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Shrewsbury, MA · issued Apr 5, 2013

    1962745141
  16. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · South Boston, MA · issued Apr 30, 2013

    1861837254
  17. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Southborough, MA · issued Jan 10, 2024

    1750152765
  18. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Stoughton, MA · issued Jul 18, 2006

    1093733057
  19. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Turners Falls, MA · issued Jul 18, 2006

    1972521508
  20. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Webster, MA · issued Aug 12, 2010

    1801101068
  21. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Wellfleet, MA · issued Jan 4, 2012

    1063782308
  22. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Westborough, MA · issued May 15, 2013

    1255777496
  23. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Westborough, MA · issued Apr 19, 2018

    1023505674
  24. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Worcester, MA · issued Jul 18, 2006

    1295753242
  25. Quest Diagnostics Massachusetts LLC

    Clinical Medical Laboratory · Worcester, MA · issued Jul 18, 2006

    1104844158

Source: CMS NPPES monthly file of Aug 9, 2026, organization (Type 2) records.