Registry data as of Aug 27, 2026

The Arc Mercer

The Arc Mercer holds 57 active organization NPIs in the federal registry, with practice locations in 7 New Jersey cities. 41 list community/behavioral health agency 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

Ewing has the most NPIs, 19

  1. Ewing19
  2. Hamilton12
  3. Lawrenceville9
  4. Princeton9
  5. Trenton6
  6. Pennington1
  7. Yardville1

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

Most NPIs were issued in 2017 and 2023

The Arc Mercer NPIs by year issued2016: 1, 2017: 22, 2018: 3, 2019: 7, 2020: 0, 2021: 6, 2022: 3, 2023: 8, 2024: 70102030201620172018201920202021202220232024228137637
The Arc Mercer NPIs by year issued2016: 1, 2017: 22, 2018: 3, 2019: 7, 2020: 0, 2021: 6, 2022: 3, 2023: 8, 2024: 70102030201620172018201920202021202220232024228137637
The Arc Mercer NPIs by year issued2016: 1, 2017: 22, 2018: 3, 2019: 7, 2020: 0, 2021: 6, 2022: 3, 2023: 8, 2024: 70102030201620172018201920202021202220232024228137637

Source: CMS NPPES, enumeration dates.

22 NPIs were issued in 2017 alone, more than in any other year; none in 1 of the years between.

Ewing locations

The city with the most The Arc Mercer NPIs. The full list of all 57 follows.

NPILocationPrimary taxonomyIssued
11942456131015 WHITEHEAD ROAD EXT APT 111, EwingCommunity/Behavioral Health AgencyJun 26, 2017
1659892974105 BUTTONWOOD DR APT 6, EwingCommunity/Behavioral Health AgencyJun 28, 2017
12255595451015 WHITEHEAD ROAD EXT APT 208, EwingCommunity/Behavioral Health AgencyJun 28, 2017
12750545951015 WHITEHEAD ROAD EXT APT 114, EwingCommunity/Behavioral Health AgencyJun 28, 2017
1902327224105 BUTTONWOOD DR APT 5, EwingCommunity/Behavioral Health AgencyJun 28, 2017
1992226211105 BUTTONWOOD DR APT 3, EwingCommunity/Behavioral Health AgencyJun 28, 2017
1891216115105 BUTTONWOOD DR APT 2, EwingCommunity/Behavioral Health AgencyJun 28, 2017
1366963688105 BUTTONWOOD DR APT 4, EwingCommunity/Behavioral Health AgencyJun 28, 2017
All 57 locations, by city
NPILocationPrimary taxonomyIssued
11942456131015 WHITEHEAD ROAD EXT APT 111, EwingCommunity/Behavioral Health AgencyJun 26, 2017
1659892974105 BUTTONWOOD DR APT 6, EwingCommunity/Behavioral Health AgencyJun 28, 2017
12255595451015 WHITEHEAD ROAD EXT APT 208, EwingCommunity/Behavioral Health AgencyJun 28, 2017
12750545951015 WHITEHEAD ROAD EXT APT 114, EwingCommunity/Behavioral Health AgencyJun 28, 2017
1902327224105 BUTTONWOOD DR APT 5, EwingCommunity/Behavioral Health AgencyJun 28, 2017
1992226211105 BUTTONWOOD DR APT 3, EwingCommunity/Behavioral Health AgencyJun 28, 2017
1891216115105 BUTTONWOOD DR APT 2, EwingCommunity/Behavioral Health AgencyJun 28, 2017
1366963688105 BUTTONWOOD DR APT 4, EwingCommunity/Behavioral Health AgencyJun 28, 2017
11245494491015 WHITEHEAD ROAD EXT APT 123, EwingCommunity/Behavioral Health AgencyJun 28, 2017
1023527587180 EWINGVILLE RD, EwingDevelopmentally Disabled Services Day Training AgencySep 27, 2017
114478430711 GREAT WOODS DR, EwingCommunity/Behavioral Health AgencyJan 22, 2019
19125483711450 PARKSIDE AVE STE 7, EwingDevelopmentally Disabled Services Day Training AgencyOct 7, 2019
17004517211015 WHITEHEAD ROAD EXT APT 109, EwingCommunity/Behavioral Health AgencyMay 21, 2021
13266133401015 WHITEHEAD ROAD EXT APT 209, EwingCommunity/Behavioral Health AgencyMay 21, 2021
18519668811015 WHITEHEAD ROAD EXT APT 136, EwingCommunity/Behavioral Health AgencyMay 21, 2021
12256032511015 WHITEHEAD ROAD EXT APT 217, EwingCommunity/Behavioral Health AgencyMay 21, 2021
10530835685 FOREST LANE, EwingCommunity/Behavioral Health AgencyOct 3, 2021
125508539510 METEKUNK DR, EwingCommunity/Behavioral Health AgencyFeb 8, 2022
15389853951531 PENNINGTON ROAD, EwingDevelopmentally Disabled Services Day Training AgencyNov 26, 2024
18416443171072 OLD TRENTON RD, HamiltonDevelopmentally Disabled Services Day Training AgencyApr 20, 2016
16891831621072 OLD TRENTON RD, HamiltonDevelopmentally Disabled Services Day Training AgencySep 27, 2017
162956657512 COMPTON WAY, HamiltonCommunity/Behavioral Health AgencyApr 26, 2018
1346738291236 MURRAY AVE, HamiltonCommunity/Behavioral Health AgencyApr 26, 2018
195286500811 PHAETON DR, HamiltonCommunity/Behavioral Health AgencyJan 23, 2019
11640631291542 KUSER RD STE B7, HamiltonMental Health CounselorOct 1, 2019
163971009888 VILLAGE DR E, HamiltonCommunity/Behavioral Health AgencyOct 7, 2019
1962174474235 COLONIAL AVE, HamiltonCommunity/Behavioral Health AgencyOct 3, 2021
10833517871470 KLOCKNER ROAD, HamiltonIntellectual and/or Developmental Disabilities Community Based Residential Treatment FacilityMay 16, 2022
1033826441453 INDEPENDENCE AVE, HamiltonCommunity/Behavioral Health AgencyNov 4, 2022
140753256761 POPE AVE, HamiltonIntellectual and/or Developmental Disabilities Community Based Residential Treatment FacilityJun 23, 2023
18511187566 KIM VALLEY RD, HamiltonIntellectual and/or Developmental Disabilities Residential Treatment FacilitySep 23, 2024
162959816410 FREEDOM BLVD, LawrencevilleCommunity/Behavioral Health AgencyJun 26, 2017
151848883216 FREEDOM BLVD, LawrencevilleCommunity/Behavioral Health AgencyJun 28, 2017
169929691312 FREEDOM BLVD, LawrencevilleCommunity/Behavioral Health AgencyJun 28, 2017
142757974737 FREEDOM BLVD, LawrencevilleCommunity/Behavioral Health AgencyJun 28, 2017
118414534441 FREEDOM BLVD, LawrencevilleCommunity/Behavioral Health AgencyJun 28, 2017
159828681750 FREEDOM CT, LawrencevilleCommunity/Behavioral Health AgencyJun 28, 2017
174078750650 FREEDOM CT, LawrencevilleCommunity/Behavioral Health AgencyApr 9, 2018
173072586228 FREEDOM CT, LawrencevilleCommunity/Behavioral Health AgencyNov 25, 2019
155890768330 FREEDOM CT, LawrencevilleCommunity/Behavioral Health AgencyNov 25, 2019
146727937214 FOX RUN RD, PenningtonCommunity/Behavioral Health AgencySep 23, 2024
1699451880200 THANET CIR APT 122, PrincetonIntellectual and/or Developmental Disabilities Community Based Residential Treatment FacilityJun 23, 2023
1225714892200 THANET CIR APT 223, PrincetonIntellectual and/or Developmental Disabilities Community Based Residential Treatment FacilityJun 27, 2023
1154007714200 THANET CIR APT 123, PrincetonIntellectual and/or Developmental Disabilities Community Based Residential Treatment FacilityJun 27, 2023
1699451260200 THANET CIR APT 423, PrincetonIntellectual and/or Developmental Disabilities Community Based Residential Treatment FacilityJun 27, 2023
1093491573200 THANET CIR APT 323, PrincetonIntellectual and/or Developmental Disabilities Community Based Residential Treatment FacilityJun 27, 2023
1861219149275 N HARRISON ST UNIT 218, PrincetonCommunity/Behavioral Health AgencySep 26, 2024
1558189886275 N HARRISON ST UNIT 318, PrincetonCommunity/Behavioral Health AgencySep 26, 2024
1871310151275 N HARRISON ST UNIT 118, PrincetonCommunity/Behavioral Health AgencySep 26, 2024
1215755483275 N HARRISON ST UNIT 244, PrincetonCommunity/Behavioral Health AgencySep 27, 2024
1932620242196 ROUTE 156 APT 4, TrentonCommunity/Behavioral Health AgencyJun 28, 2017
1003337262196 ROUTE 156 APT 3, TrentonCommunity/Behavioral Health AgencyJun 28, 2017
1912428178196 ROUTE 156 APT 5, TrentonCommunity/Behavioral Health AgencyJun 28, 2017
1225559537196 ROUTE 156 APT 6, TrentonCommunity/Behavioral Health AgencyJun 28, 2017
1659892966196 ROUTE 156 APT 2, TrentonCommunity/Behavioral Health AgencyJun 28, 2017
109349978220 WINDSWEPT DR, TrentonIntellectual and/or Developmental Disabilities Community Based Residential Treatment FacilityJun 13, 2023
1043994775242 ROUTE 156, YardvilleIntellectual and/or Developmental Disabilities Community Based Residential Treatment FacilityJun 13, 2023

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 The Arc Mercer have 57 NPIs?

An organization may obtain more than one Type 2 NPI, for example for separate locations or units that bill on their own. The Arc Mercer's NPIs list practice locations in 7 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.