Registry data as of Aug 27, 2026

Quest Diagnostics LLC Il

Quest Diagnostics LLC Il holds 23 active organization NPIs in the federal registry, with practice locations in 20 cities in 6 states. 22 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

Davenport, IA has the most NPIs, 2

  1. Davenport, IA2
  2. Chicago, IL2
  3. Saint Paul, MN2
  4. Clinton, IA1
  5. Mount Pleasant, IA1
  6. Glenview, IL1
  7. Lansing, IL1
  8. Schaumburg, IL1

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

Most NPIs were issued in 2006 and 2020

Quest Diagnostics LLC Il NPIs by year issued2006: 6, 2007: 1, 2008: 0, 2009: 0, 2010: 1, 2011: 0, 2012: 0, 2013: 0, 2014: 0, 2015: 0, 2016: 0, 2017: 4, 2018: 0, 2019: 1, 2020: 5, 2021: 0, 2022: 0, 2023: 3, 2024: 1, 2025: 1024620072009201120132015201720192021202320252006: 62020: 51141311
Quest Diagnostics LLC Il NPIs by year issued2006: 6, 2007: 1, 2008: 0, 2009: 0, 2010: 1, 2011: 0, 2012: 0, 2013: 0, 2014: 0, 2015: 0, 2016: 0, 2017: 4, 2018: 0, 2019: 1, 2020: 5, 2021: 0, 2022: 0, 2023: 3, 2024: 1, 2025: 1024620072009201120132015201720192021202320252006: 62020: 51141311
Quest Diagnostics LLC Il NPIs by year issued2006: 6, 2007: 1, 2008: 0, 2009: 0, 2010: 1, 2011: 0, 2012: 0, 2013: 0, 2014: 0, 2015: 0, 2016: 0, 2017: 4, 2018: 0, 2019: 1, 2020: 5, 2021: 0, 2022: 0, 2023: 3, 2024: 1, 2025: 1024620072010201320162019202220252006: 62020: 51141311

Source: CMS NPPES, enumeration dates.

6 NPIs were issued in 2006 alone, more than in any other year; none in 11 of the years between.

Davenport, IA locations

The city with the most Quest Diagnostics LLC Il NPIs. The full list of all 23 follows.

NPILocationPrimary taxonomyIssued
1366223166500 W RIVER DR, Davenport, IAClinical Medical LaboratoryOct 9, 2023
12359109361510 E RUSHOLME ST, Davenport, IAClinical Medical LaboratoryOct 9, 2023
All 23 locations, by state and city
NPILocationPrimary taxonomyIssued
1750162467925 S 4TH ST, Clinton, IAClinical Medical LaboratoryOct 9, 2023
1366223166500 W RIVER DR, Davenport, IAClinical Medical LaboratoryOct 9, 2023
12359109361510 E RUSHOLME ST, Davenport, IAClinical Medical LaboratoryOct 9, 2023
1942194196501 S WHITE ST STE 1, Mount Pleasant, IAClinical Medical LaboratoryJun 4, 2025
1538189238680 N LAKE SHORE DR STE 907, Chicago, ILClinical Medical LaboratoryJul 19, 2006
16692980551431 N WESTERN AVE STE 202, Chicago, ILClinical Medical LaboratoryDec 2, 2024
15785815263633 W LAKE AVE STE 201 (2ND FLOOR), Glenview, ILClinical Medical LaboratoryJul 18, 2006
191292597517130 TORRENCE AVE STE 420, Lansing, ILClinical Medical LaboratoryJul 18, 2006
1346389764506 E STATE PKWY, Schaumburg, ILClinical Medical LaboratoryFeb 5, 2007
1710906342870 W END CT, Vernon Hills, ILClinical Medical LaboratoryJul 18, 2006
18816306141355 MITTEL BLVD, Wood Dale, ILClinical Medical LaboratoryJun 21, 2006
11245413883133 S TELEGRAPH RD STE B, Dearborn, MIClinical Medical LaboratoryJul 19, 2017
1790321750600 E PRESTON ST STE 204, Mt Pleasant, MIClinical Medical LaboratoryNov 25, 2019
185180591511091 ULYSSES ST NE STE 100, Blaine, MNClinical Medical LaboratoryNov 28, 2017
15881786028515 EAGLE POINT BLVD STE 100, Lake Elmo, MNClinical Medical LaboratoryNov 28, 2017
10932321672828 CHICAGO AVE, Minneapolis, MNClinical Medical LaboratoryAug 29, 2017
1649298605600 COUNTY ROAD D W STE 11, New Brighton, MNClinical Medical LaboratoryJul 18, 2006
1285244616895 7TH ST E, Saint Paul, MNClinical Medical LaboratoryJul 31, 2020
1740890334153 CESAR CHAVEZ ST, Saint Paul, MNClinical Medical LaboratoryAug 7, 2020
105393721923030 STATE ROUTE 73 STE A, West Portsmouth, OHClinical Medical LaboratoryJun 23, 2020
1851901466707 S UNIVERSITY AVE, Beaver Dam, WIAnatomic Pathology & Clinical Pathology PhysicianAug 7, 2020
18812038264852 S 6TH ST, Milwaukee, WIClinical Medical LaboratoryJul 27, 2020
11445424651687 E DIVISION ST, River Falls, WIClinical Medical LaboratoryMar 1, 2010

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 LLC Il have 23 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 LLC Il's NPIs list practice locations in 20 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.