NPPES file of Aug 9, 2026

San Marcos Medical Group

San Marcos Medical Group holds 9 active organization NPIs in the federal registry, with practice locations in 4 California cities. 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 Bernardino has the most NPIs, 4

  1. San Bernardino4
  2. Fontana3
  3. Rialto1
  4. Riverside1

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

Most NPIs were issued in 2006 and 2007

San Marcos Medical Group NPIs by year issued2006: 5, 2007: 3, 2008: 0, 2009: 0, 2010: 0, 2011: 10246200620072008200920102011531
San Marcos Medical Group NPIs by year issued2006: 5, 2007: 3, 2008: 0, 2009: 0, 2010: 0, 2011: 10246200620072008200920102011531
San Marcos Medical Group NPIs by year issued2006: 5, 2007: 3, 2008: 0, 2009: 0, 2010: 0, 2011: 10246200620072008200920102011531

Source: CMS NPPES, enumeration dates.

5 NPIs were issued in 2006 alone, more than in any other year; none in 3 of the years between.

San Bernardino locations

The city with the most San Marcos Medical Group NPIs. The full list of all 9 follows.

NPILocationPrimary taxonomyIssued
1235189978742 W HIGHLAND AVE, San BernardinoFamily Medicine PhysicianMay 11, 2006
15482102977576 STERLING AVE, San BernardinoFamily Medicine PhysicianMay 11, 2006
11846748301574 W BASE LINE ST, San BernardinoFamily Nurse PractitionerMay 11, 2006
14473965931574 W BASE LINE ST STE 107, San BernardinoClinical Medical LaboratoryJan 29, 2007
All 9 locations, by city
NPILocationPrimary taxonomyIssued
16391293727965 SIERRA AVE, FontanaFamily Medicine PhysicianMay 11, 2006
168971761310444 LIVEOAK AVE., FontanaOccupational Medicine Clinic/CenterFeb 15, 2007
144744644814980 SUMMIT AVE STE 230, FontanaObstetrics & Gynecology PhysicianSep 24, 2007
1265721856425 E FOOTHILL BLVD, RialtoObstetrics & Gynecology PhysicianApr 4, 2011
19523516864990 ARLINGTON AVE, RiversideFamily Medicine PhysicianMay 11, 2006
1235189978742 W HIGHLAND AVE, San BernardinoFamily Medicine PhysicianMay 11, 2006
15482102977576 STERLING AVE, San BernardinoFamily Medicine PhysicianMay 11, 2006
11846748301574 W BASE LINE ST, San BernardinoFamily Nurse PractitionerMay 11, 2006
14473965931574 W BASE LINE ST STE 107, San BernardinoClinical Medical LaboratoryJan 29, 2007

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 San Marcos Medical Group have 9 NPIs?

An organization may obtain more than one Type 2 NPI, for example for separate locations or units that bill on their own. San Marcos Medical Group'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.