Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Katharine Ellis, LCSW-C
Social Worker in Rockville, MD · enumerated 2019.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1992343131
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Registry record
Entity type Individual (Type 1)
Name Katharine Ellis
Credential LCSW-C
Sex Female
Practice address 7300 Calhoun Pl Ste 600, Rockville, MD, 20855
Phone (202) 913-4036
Enumeration date Dec 18, 2019
Last updated in NPPES Jun 24, 2021
Taxonomy & licenses
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
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.
What specialty is Katharine Ellis?
Katharine Ellis 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.
Other providers at this practice address
Browse all → Christian Schneider Clinical Social Worker · Rockville, MD NPI 1639257587 Frank Fellows Marriage & Family Therapist · Rockville, MD NPI 1225452659 The Primary Care Coalition of Montgomery County, Maryland Mental Health Clinic/Center (Including Community Mental Health Center) · Rockville, MD NPI 1780008003 Robert Wright Clinical Social Worker · Rockville, MD NPI 1740606177 Montgomery County Maryland Government Adolescent and Children Mental Health Clinic/Center · Rockville, MD NPI 1619387933 Tomas Alejo Social Worker · Rockville, MD NPI 1679931208 Amanda Moreno Social Worker · Derwood, MD NPI 1912442369 Elena Sanchez Dominguez Marriage & Family Therapist · Rockville, MD NPI 1568033595
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-24.