NPPES file of Aug 9, 2026

Gruen Ross Optika

Gruen Ross Optika holds 6 active organization NPIs in the federal registry, with practice locations in 2 cities in 2 states. 3 list optometrist 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

New York, NY has the most NPIs, 5

  1. New York, NY5
  2. Greenwich, CT1

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

Most NPIs were issued in 2007 and 2008

Gruen Ross Optika NPIs by year issued2007: 3, 2008: 301232007200833
Gruen Ross Optika NPIs by year issued2007: 3, 2008: 301232007200833
Gruen Ross Optika NPIs by year issued2007: 3, 2008: 301232007200833

Source: CMS NPPES, enumeration dates.

3 NPIs were issued in 2007 alone, more than in any other year.

New York, NY locations

The city with the most Gruen Ross Optika NPIs. The full list of all 6 follows.

NPILocationPrimary taxonomyIssued
1265611982599 LEXINGTON AVE, New York, NYEyewear SupplierOct 30, 2007
16292572411225 LEXINGTON AVE, New York, NYEyewear SupplierOct 31, 2007
15787438032009 BROADWAY, New York, NYEyewear SupplierNov 3, 2007
19222542182384 BROADWAY, New York, NYOptometristAug 18, 2008
16494269331076 3RD AVE, New York, NYOptometristAug 18, 2008
All 6 locations, by state and city
NPILocationPrimary taxonomyIssued
1639325921229 GREENWICH AVE, Greenwich, CTOptometristAug 18, 2008
1265611982599 LEXINGTON AVE, New York, NYEyewear SupplierOct 30, 2007
16292572411225 LEXINGTON AVE, New York, NYEyewear SupplierOct 31, 2007
15787438032009 BROADWAY, New York, NYEyewear SupplierNov 3, 2007
19222542182384 BROADWAY, New York, NYOptometristAug 18, 2008
16494269331076 3RD AVE, New York, NYOptometristAug 18, 2008

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 Gruen Ross Optika have 6 NPIs?

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