NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Tristan Associates

Diagnostic Radiology Physician in Harrisburg, PA · enumerated 2005 · authorized official Paul Deloia, Ceo Tristan Associates.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1629054721

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Tristan Associates
Practice address 4518 Union Deposit Rd, Harrisburg, PA, 17111
Phone (717) 652-5840
Fax (717) 652-8152
Enumeration date Dec 20, 2005
Last updated in NPPES Jan 8, 2010

Taxonomy & classification

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Paul Deloia
Title Ceo Tristan Associates
Phone (717) 652-6105

Other identifiers

Identifier Type State Issuer
CA9270 Other PA RAILROAD MEDICARE
718282 Other PA CIGNA MEDICARE ACCESS
0671945GRP Medicaid PA -

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is Tristan Associates?
Tristan Associates is registered in NPPES as a Diagnostic Radiology Physician (its primary provider taxonomy).
What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-01-08.