Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Gregory Bruce Sonnenfeld, ATC
Athletic Trainer in Alcoa, TN · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1679500110
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Registry record
Entity type Individual (Type 1)
Name Gregory Bruce Sonnenfeld
Credential ATC
Sex Male
Practice address 220 Associates Blvd, Outpatient Rehab, Alcoa, TN, 37701
Phone (865) 980-7140
Enumeration date Jun 28, 2006
Last updated in NPPES Feb 6, 2008
Taxonomy & licenses
2255A2300X Athletic Trainer Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 762 (TN) Primary
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.
Frequently asked questions
What specialty is Gregory Sonnenfeld?
Gregory Sonnenfeld is registered in NPPES with the primary taxonomy of Athletic Trainer. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
Browse all → Elizabeth Emeterio Athletic Trainer · Alcoa, TN NPI 1063486389 Lee Naramore Psychiatry Physician · Alcoa, TN NPI 1023082302 Darrell Smith Internal Medicine Physician · Alcoa, TN NPI 1649206616 Blount Memorial Occupational Health Physical Therapy Clinic/Center · Alcoa, TN NPI 1033148606 Cheri Alexander Athletic Trainer · Alcoa, TN NPI 1518974112 Stephen Becker Plastic Surgery Physician · Alcoa, TN NPI 1164628145 David Skinner Dermatology Physician · Alcoa, TN NPI 1407143480 Callyn Henry Physician Assistant · Alcoa, TN NPI 1942587407
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-02-06.