Registry data as of Aug 27, 2026

Quest Diagnostics

Quest Diagnostics holds 50 active organization NPIs in the federal registry, with practice locations in 38 cities in 11 states. All list clinical medical laboratory as their primary taxonomy; each location can bill under its own NPI.

CMS NPPES registry, file of Aug 9, 2026 · legal names grouped after punctuation and "LLC" are removed · method · Verify with CMS →

Which NPI is yours?

Search the organization with your city to find the NPI for the location you visit or bill.

Find a location's NPI

Chicago, IL has the most NPIs, 5

  1. Chicago, IL5
  2. Norwich, CT4
  3. Hartford, CT2
  4. New Britain, CT2
  5. New Haven, CT2
  6. Wallingford, CT2
  7. North Dartmouth, MA2
  8. Branford, CT1

Source: CMS NPPES monthly file of Aug 9, 2026, organization NPIs by practice city.

Most NPIs were issued in 2006 and 2007

Quest Diagnostics NPIs by year issued2006: 7, 2007: 14, 2008: 0, 2009: 0, 2010: 3, 2011: 0, 2012: 0, 2013: 2, 2014: 0, 2015: 0, 2016: 2, 2017: 1, 2018: 2, 2019: 0, 2020: 5, 2021: 6, 2022: 0, 2023: 4, 2024: 4051015200620082010201220142016201820202022202472007: 14322125644
Quest Diagnostics NPIs by year issued2006: 7, 2007: 14, 2008: 0, 2009: 0, 2010: 3, 2011: 0, 2012: 0, 2013: 2, 2014: 0, 2015: 0, 2016: 2, 2017: 1, 2018: 2, 2019: 0, 2020: 5, 2021: 6, 2022: 0, 2023: 4, 2024: 40510152006200720082009201020112012201320142015201620172018201920202021202220232024714322125644
Quest Diagnostics NPIs by year issued2006: 7, 2007: 14, 2008: 0, 2009: 0, 2010: 3, 2011: 0, 2012: 0, 2013: 2, 2014: 0, 2015: 0, 2016: 2, 2017: 1, 2018: 2, 2019: 0, 2020: 5, 2021: 6, 2022: 0, 2023: 4, 2024: 4051015200620092012201520182021202472007: 14

Source: CMS NPPES, enumeration dates.

14 NPIs were issued in 2007 alone, more than in any other year; none in 8 of the years between.

Chicago, IL locations

The city with the most Quest Diagnostics NPIs. The full list of all 50 follows.

NPILocationPrimary taxonomyIssued
10832059423924 W FULLERTON AVE, Chicago, ILClinical Medical LaboratoryFeb 2, 2021
17307707511649 N PULASKI RD, Chicago, ILClinical Medical LaboratoryFeb 2, 2021
18519826235635 W BELMONT AVE, Chicago, ILClinical Medical LaboratoryFeb 3, 2021
16094607651431 N WESTERN AVE STE 406, Chicago, ILClinical Medical LaboratoryMar 1, 2021
15680482051127 N OAKLEY BLVD FL 2, Chicago, ILClinical Medical LaboratoryMar 23, 2021
All 50 locations, by state and city
NPILocationPrimary taxonomyIssued
18414924441008 MAIN ST, Branford, CTClinical Medical LaboratoryJun 5, 2007
10939175447 GERMANTOWN RD, Danbury, CTClinical Medical LaboratoryJun 5, 2007
1639371230299 SEYMOUR AVE, Derby, CTClinical Medical LaboratoryJun 5, 2007
13767459843000 DIXWELL AVE, Hamden, CTClinical Medical LaboratoryJun 5, 2007
179098726121 WOODLAND ST, Hartford, CTClinical Medical LaboratoryJun 5, 2007
1407398712100 RETREAT AVE SUITE 408, Hartford, CTClinical Medical LaboratoryNov 17, 2016
149795703940 HART ST BUILDING C, New Britain, CTClinical Medical LaboratoryJun 5, 2007
11447376282150 CORBIN AVE, New Britain, CTClinical Medical LaboratoryJan 5, 2018
11444235672 CHURCH ST STE 115, New Haven, CTClinical Medical LaboratoryJun 6, 2007
1346792355374 GRAND AVE FIRST FLOOR, New Haven, CTClinical Medical LaboratoryOct 26, 2016
156877246541 FAIR HARBOUR PL, New London, CTClinical Medical LaboratoryOct 14, 2010
1831391473955 MAIN ST, Newington, CTClinical Medical LaboratoryJun 5, 2007
197252192040 CROSS ST, Norwalk, CTClinical Medical LaboratoryJul 18, 2006
1255533808118 NEW LONDON TPKE, Norwich, CTClinical Medical LaboratoryJun 5, 2007
160918588322 CASE ST, Norwich, CTClinical Medical LaboratoryOct 5, 2010
1083954119111 SALEM TPKE, Norwich, CTClinical Medical LaboratoryFeb 27, 2013
1982111555118 NEW LONDON TPKE, Norwich, CTClinical Medical LaboratoryJan 4, 2018
1548462070166 WATERBURY RD, Prospect, CTClinical Medical LaboratoryJun 5, 2007
17808863331250 SUMMER ST SUITE 206, Stamford, CTClinical Medical LaboratoryJun 5, 2007
137685255855 WILCOX RD, Stonington, CTClinical Medical LaboratoryOct 5, 2010
1194743724555 LORDSHIP BLVD, Stratford, CTClinical Medical LaboratoryJul 18, 2006
11745699093 STERLING DR, Wallingford, CTClinical Medical LaboratoryJun 21, 2006
178012219250 GAYLORD FARM RD, Wallingford, CTClinical Medical LaboratoryFeb 6, 2017
171051882460 WESTWOOD AVE, Waterbury, CTClinical Medical LaboratoryJan 28, 2020
193230158774 MACK ST, Windsor, CTClinical Medical LaboratoryJun 5, 2007
10832059423924 W FULLERTON AVE, Chicago, ILClinical Medical LaboratoryFeb 2, 2021
17307707511649 N PULASKI RD, Chicago, ILClinical Medical LaboratoryFeb 2, 2021
18519826235635 W BELMONT AVE, Chicago, ILClinical Medical LaboratoryFeb 3, 2021
16094607651431 N WESTERN AVE STE 406, Chicago, ILClinical Medical LaboratoryMar 1, 2021
15680482051127 N OAKLEY BLVD FL 2, Chicago, ILClinical Medical LaboratoryMar 23, 2021
1992586606708 15TH AVE, East Moline, ILClinical Medical LaboratoryOct 9, 2023
19622836551106 4TH AVE, Moline, ILClinical Medical LaboratoryOct 10, 2023
19127885062750 11TH ST, Rock Island, ILClinical Medical LaboratoryOct 10, 2023
181102144710525 W 21ST ST N, Wichita, KSClinical Medical LaboratoryMar 15, 2007
1760221592851 MIDDLE ST STE 2100, Fall River, MAClinical Medical LaboratoryMay 21, 2024
1952347791200 FOREST ST 3RD FLOOR,SUITE B, Marlborough, MAClinical Medical LaboratoryJun 21, 2006
17309285651400 WORCESTER ST, Natick, MAClinical Medical LaboratoryMay 21, 2024
1225887615531 FAUNCE CORNER RD, North Dartmouth, MAClinical Medical LaboratoryMay 16, 2024
1881433605535 FAUNCE CORNER RD, North Dartmouth, MAClinical Medical LaboratoryMay 21, 2024
16590611901 CUMBERLAND PL, Bangor, MEClinical Medical LaboratoryMay 9, 2023
13762073992711 E FRANKLIN AVE, Minneapolis, MNClinical Medical LaboratoryOct 26, 2021
18111849713812 N 8TH ST, Saint Cloud, MNClinical Medical LaboratoryOct 2, 2007
107353163814 TSIENNETO ROAD SUITE 201, Derry, NHClinical Medical LaboratoryJul 18, 2006
117468485642 MICHAEL LOOP, Staten Island, NYClinical Medical LaboratoryDec 13, 2006
192261616814590 STATE ROUTE 93 STE A, Jackson, OHClinical Medical LaboratoryJul 14, 2020
16498820287777 ST RT 23, STE A, Piketon, OHClinical Medical LaboratoryAug 18, 2020
1063023612621 BROADWAY ST STE A, Portsmouth, OHClinical Medical LaboratoryAug 16, 2020
1821605338227 VALLEY VIEW DR STE A, Waverly, OHClinical Medical LaboratorySep 29, 2020
11940655571001 ADAMS AVE, Norristown, PAClinical Medical LaboratoryFeb 22, 2013
14472784031524 ATWOOD AVE, LL1, Johnston, RIClinical Medical LaboratoryJul 18, 2006

Related names

Checking an organization

  1. Match the NPI to the exact location you will visit or bill; each location can have its own.
  2. Confirm the business entity with the secretary of state.
  3. Check the HHS-OIG exclusion list for the organization and its owners.
  4. Verify each clinician you will see on their own record and with the state license search.

Common questions

Why does Quest Diagnostics have 50 NPIs?

An organization may obtain more than one Type 2 NPI, for example for separate locations or units that bill on their own. Quest Diagnostics's NPIs list practice locations in 38 cities.

Is an organization NPI a license?

No. An NPI identifies who bills. Facilities and the clinicians who work there are licensed separately by the state.

Source: CMS National Plan and Provider Enumeration System (NPPES), monthly file of Aug 9, 2026 (NPPES files on CMS.gov). An NPI identifies who bills; it is not a license.