Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. Thomas Andrew Ernst, LSW
Social Worker in West Chester, PA · enumerated 2009.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1669608584
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Registry record
Entity type Individual (Type 1)
Name Mr. Thomas Andrew Ernst
Credential LSW
Sex Male
Practice address 1140 Mcdermott Dr, 100/101, West Chester, PA, 19380
Phone (610) 430-6141
Fax (610) 430-7708
Enumeration date Jun 5, 2009
Last updated in NPPES Jun 5, 2009
Taxonomy & licenses
104100000X Social Worker Behavioral Health & Social Service Providers · License SW008380L (PA) 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 Thomas Ernst?
Thomas Ernst is registered in NPPES with the primary taxonomy of Social Worker. 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 → Renae Utz Clinical Social Worker · West Chester, PA NPI 1861515264 Vera Di Vincenzo Mental Health Counselor · West Chester, PA NPI 1831325893 Michele Ward-Illich Social Worker · West Chester, PA NPI 1417184581 Karen Ernst Social Worker · West Chester, PA NPI 1770888620 Danielle Flick Pharmacist · West Chester, PA NPI 1528433612 Samantha Spatocco Pharmacist · West Chester, PA NPI 1619342029
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-06-05.