NPPES file of Aug 9, 2026

Oncology Associates

Oncology Associates holds 5 active organization NPIs in the federal registry, with practice locations in 5 cities in 5 states. 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

Hartford, CT has the most NPIs, 1

  1. Hartford, CT1
  2. Southfield, MI1
  3. Omaha, NE1
  4. Bedford, OH1
  5. Phila, PA1

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

Most NPIs were issued in 2006 and 2007

Oncology Associates NPIs by year issued2006: 1, 2007: 3, 2008: 0, 2009: 0, 2010: 0, 2011: 0, 2012: 101232006200720082009201020112012131
Oncology Associates NPIs by year issued2006: 1, 2007: 3, 2008: 0, 2009: 0, 2010: 0, 2011: 0, 2012: 101232006200720082009201020112012131
Oncology Associates NPIs by year issued2006: 1, 2007: 3, 2008: 0, 2009: 0, 2010: 0, 2011: 0, 2012: 101232006200720082009201020112012131

Source: CMS NPPES, enumeration dates.

3 NPIs were issued in 2007 alone, more than in any other year; none in 4 of the years between.

Hartford, CT locations

The city with the most Oncology Associates NPIs. The full list of all 5 follows.

NPILocationPrimary taxonomyIssued
146758619885 RETREAT AVE, Hartford, CTSpecialistMar 15, 2007
All 5 locations, by state and city
NPILocationPrimary taxonomyIssued
146758619885 RETREAT AVE, Hartford, CTSpecialistMar 15, 2007
119485279822255 GREENFIELD RD STE 450, Southfield, MIHematology (Internal Medicine) PhysicianFeb 28, 2007
19028417608303 DODGE ST SUITE 225, Omaha, NEHematology & Oncology PhysicianJun 17, 2006
164954466988 CENTER RD SUITE 210, Bedford, OHHematology & Oncology PhysicianMar 8, 2012
12059725102300 E. ALLEGHENY AVE, Phila, PASurgery PhysicianJan 30, 2007

Related names

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 Oncology Associates have 5 NPIs?

An organization may obtain more than one Type 2 NPI, for example for separate locations or units that bill on their own. Oncology Associates's NPIs list practice locations in 5 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.