NPPES file of Aug 9, 2026

Tristan Associates

Tristan Associates holds 8 active organization NPIs in the federal registry, with practice locations in 6 Pennsylvania cities. All list diagnostic radiology physician 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

Harrisburg has the most NPIs, 2

  1. Harrisburg2
  2. Lewisburg2
  3. Camp Hill1
  4. Carlisle1
  5. Hershey1
  6. Middleburg1

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

Most NPIs were issued in 2005 and 2006

Tristan Associates NPIs by year issued2005: 5, 2006: 302462005200653
Tristan Associates NPIs by year issued2005: 5, 2006: 302462005200653
Tristan Associates NPIs by year issued2005: 5, 2006: 302462005200653

Source: CMS NPPES, enumeration dates.

5 NPIs were issued in 2005 alone, more than in any other year.

Harrisburg locations

The city with the most Tristan Associates NPIs. The full list of all 8 follows.

NPILocationPrimary taxonomyIssued
16290547214518 UNION DEPOSIT RD, HarrisburgDiagnostic Radiology PhysicianDec 20, 2005
15189436202808 OLD POST RD, HarrisburgDiagnostic Radiology PhysicianDec 20, 2005
All 8 locations, by city
NPILocationPrimary taxonomyIssued
1811954118240 GRANDVIEW AVE, Camp HillDiagnostic Radiology PhysicianApr 28, 2006
11442874002 JENNIFER COURT STE A, CarlisleDiagnostic Radiology PhysicianApr 28, 2006
16290547214518 UNION DEPOSIT RD, HarrisburgDiagnostic Radiology PhysicianDec 20, 2005
15189436202808 OLD POST RD, HarrisburgDiagnostic Radiology PhysicianDec 20, 2005
166945840232 NORTHEAST DR STE 101, HersheyDiagnostic Radiology PhysicianDec 22, 2005
197258907528 SILVERMOON LN, LewisburgDiagnostic Radiology PhysicianDec 20, 2005
1043277338120 HAMM DR, LewisburgDiagnostic Radiology PhysicianApr 28, 2006
18018729087 DOCK HILL RD, MiddleburgDiagnostic Radiology PhysicianDec 20, 2005

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 Tristan Associates have 8 NPIs?

An organization may obtain more than one Type 2 NPI, for example for separate locations or units that bill on their own. Tristan Associates's NPIs list practice locations in 6 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.