NPPES file of Aug 9, 2026

On Lok Senior Health Services

On Lok Senior Health Services holds 11 active organization NPIs in the federal registry, with practice locations in 4 California cities. 10 list adult day care clinic/center 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

San Francisco has the most NPIs, 6

  1. San Francisco6
  2. San Jose3
  3. Fremont1
  4. Union City1

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

Most NPIs were issued in 2007 and 2013

On Lok Senior Health Services NPIs by year issued2005: 1, 2006: 0, 2007: 5, 2008: 0, 2009: 1, 2010: 0, 2011: 0, 2012: 0, 2013: 2, 2014: 0, 2015: 0, 2016: 0, 2017: 0, 2018: 0, 2019: 0, 2020: 0, 2021: 0, 2022: 0, 2023: 0, 2024: 0, 2025: 202462005200720092011201320152017201920212023202552112
On Lok Senior Health Services NPIs by year issued2005: 1, 2006: 0, 2007: 5, 2008: 0, 2009: 1, 2010: 0, 2011: 0, 2012: 0, 2013: 2, 2014: 0, 2015: 0, 2016: 0, 2017: 0, 2018: 0, 2019: 0, 2020: 0, 2021: 0, 2022: 0, 2023: 0, 2024: 0, 2025: 202462005200720092011201320152017201920212023202552112
On Lok Senior Health Services NPIs by year issued2005: 1, 2006: 0, 2007: 5, 2008: 0, 2009: 1, 2010: 0, 2011: 0, 2012: 0, 2013: 2, 2014: 0, 2015: 0, 2016: 0, 2017: 0, 2018: 0, 2019: 0, 2020: 0, 2021: 0, 2022: 0, 2023: 0, 2024: 0, 2025: 20246200720102013201620192022202552112

Source: CMS NPPES, enumeration dates.

5 NPIs were issued in 2007 alone, more than in any other year; none in 16 of the years between.

San Francisco locations

The city with the most On Lok Senior Health Services NPIs. The full list of all 11 follows.

NPILocationPrimary taxonomyIssued
10432181341333 BUSH ST, San FranciscoPACE Provider OrganizationJul 12, 2005
15383624541000 MONTGOMERY ST, San FranciscoAdult Day Care Clinic/CenterJun 7, 2007
1033312962225 30TH ST, San FranciscoAdult Day Care Clinic/CenterJun 7, 2007
18010997344430 MISSION ST, San FranciscoAdult Day Care Clinic/CenterJun 7, 2007
12454331921333 BUSH ST, San FranciscoAdult Day Care Clinic/CenterJun 7, 2007
11545240071441 POWELL ST, San FranciscoAdult Day Care Clinic/CenterJun 7, 2007
All 11 locations, by city
NPILocationPrimary taxonomyIssued
13365761803683 PERALTA BLVD, FremontAdult Day Care Clinic/CenterOct 10, 2013
10432181341333 BUSH ST, San FranciscoPACE Provider OrganizationJul 12, 2005
15383624541000 MONTGOMERY ST, San FranciscoAdult Day Care Clinic/CenterJun 7, 2007
1033312962225 30TH ST, San FranciscoAdult Day Care Clinic/CenterJun 7, 2007
18010997344430 MISSION ST, San FranciscoAdult Day Care Clinic/CenterJun 7, 2007
12454331921333 BUSH ST, San FranciscoAdult Day Care Clinic/CenterJun 7, 2007
11545240071441 POWELL ST, San FranciscoAdult Day Care Clinic/CenterJun 7, 2007
1356582191299 STOCKTON AVE, San JoseAdult Day Care Clinic/CenterMar 6, 2009
1952738700130 N JACKSON AVE, San JoseAdult Day Care Clinic/CenterOct 10, 2013
1366242422151 MARTINVALE LN, San JoseAdult Day Care Clinic/CenterMar 18, 2025
15480606012600 CENTRAL AVE, Union CityAdult Day Care Clinic/CenterMar 18, 2025

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 On Lok Senior Health Services have 11 NPIs?

An organization may obtain more than one Type 2 NPI, for example for separate locations or units that bill on their own. On Lok Senior Health Services's NPIs list practice locations in 4 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.