American Diagnostics Services
American Diagnostics Services holds 6 active organization NPIs in the federal registry, with practice locations in 5 cities in 4 states. All list physiological laboratory 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 NPIWindsor Mill, MD has the most NPIs, 2
Source: CMS NPPES monthly file of Aug 9, 2026, organization NPIs by practice city.
Most NPIs were issued in 2010 and 2015
Source: CMS NPPES, enumeration dates.
2 NPIs were issued in 2010 alone, more than in any other year; none in 9 of the years between.
Windsor Mill, MD locations
The city with the most American Diagnostics Services NPIs. The full list of all 6 follows.
| NPI | Location | Primary taxonomy | Issued |
|---|---|---|---|
| 1639140387 | 2505 LORD BALTIMORE DRIVE SUITE E, Windsor Mill, MD | Physiological Laboratory | Jan 31, 2006 |
| 1285131565 | 2505 LORD BALTIMORE DR STE E, Windsor Mill, MD | Physiological Laboratory | Apr 12, 2018 |
All 6 locations, by state and city
| NPI | Location | Primary taxonomy | Issued |
|---|---|---|---|
| 1063806776 | 1660 E MAIN ST SUITE 105, Plainfield, IN | Physiological Laboratory | Mar 20, 2015 |
| 1619361326 | 4113 BARDSTOWN RD STE. 103, Louisville, KY | Physiological Laboratory | Mar 20, 2015 |
| 1487954913 | 215 SCHILLING CIR STE 114, Hunt Valley, MD | Physiological Laboratory | Nov 1, 2010 |
| 1639140387 | 2505 LORD BALTIMORE DRIVE SUITE E, Windsor Mill, MD | Physiological Laboratory | Jan 31, 2006 |
| 1285131565 | 2505 LORD BALTIMORE DR STE E, Windsor Mill, MD | Physiological Laboratory | Apr 12, 2018 |
| 1770899478 | 10101 HARWIN DR STE 172, Houston, TX | Physiological Laboratory | Aug 19, 2010 |
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 American Diagnostics Services 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. American Diagnostics Services'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.