Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mrs. Karen B Ernst, MSW, LSW
Social Worker in West Chester, PA · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1770888620
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Registry record
Entity type Individual (Type 1)
Name Mrs. Karen B Ernst
Credential MSW, LSW
Sex Female
Practice address 1140 Mcdermott Dr, West Chester, PA, 19380
Phone (610) 430-6141
Fax (610) 430-7708
Enumeration date Jan 24, 2011
Last updated in NPPES Jan 24, 2011
Taxonomy & licenses
104100000X Social Worker Behavioral Health & Social Service Providers · License SW008363L (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 Karen Ernst?
Karen 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 Thomas Ernst Social Worker · West Chester, PA NPI 1669608584 Michele Ward-Illich Social Worker · West Chester, PA NPI 1417184581 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 2011-01-24.