Principle Diagnostics
Principle Diagnostics holds 2 active organization NPIs in the federal registry, with practice locations in 2 Texas cities. 1 list specialist as their primary taxonomy; each location can bill under its own NPI.
Search the organization with your city to find the NPI for the location you visit or bill.
Find a location's NPIHouston has the most NPIs, 1
Source: CMS NPPES monthly file of Aug 9, 2026, organization NPIs by practice city.
Most NPIs were issued in 2011 and 2016
Source: CMS NPPES, enumeration dates.
1 NPIs were issued in 2011 alone, more than in any other year; none in 4 of the years between.
Houston locations
The city with the most Principle Diagnostics NPIs. The full list of all 2 follows.
| NPI | Location | Primary taxonomy | Issued |
|---|---|---|---|
| 1598213563 | 5535 MEMORIAL DR STE F-810, Houston | Specialist | Sep 19, 2016 |
All 2 locations, by city
| NPI | Location | Primary taxonomy | Issued |
|---|---|---|---|
| 1598213563 | 5535 MEMORIAL DR STE F-810, Houston | Specialist | Sep 19, 2016 |
| 1487951950 | 9337 SPRING CYPRESS RD SUITE F, Spring | Radiology Clinic/Center | Feb 18, 2011 |
Checking an organization
- Match the NPI to the exact location you will visit or bill; each location can have its own.
- Confirm the business entity with the secretary of state.
- Check the HHS-OIG exclusion list for the organization and its owners.
- Verify each clinician you will see on their own record and with the state license search.
Common questions
Why does Principle Diagnostics have 2 NPIs?
An organization may obtain more than one Type 2 NPI, for example for separate locations or units that bill on their own. Principle Diagnostics'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.