NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mrs. Kathryn Diane Karkowski, LCSW-C

Clinical Social Worker in Annapolis, MD · enumerated 2007 · practices at Greenfield Associates, M.D., P.A..

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

National Provider Identifier

1548441082

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mrs. Kathryn Diane Karkowski
Credential LCSW-C
Sex Female
Practice address Annapolis, MD, 21401
Phone (410) 266-1600
Fax (410) 266-5554
Enumeration date Nov 26, 2007
Last updated in NPPES Nov 26, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 10575 (MD) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Kathryn Karkowski's NPI record?
Cross-check NPI 1548441082 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1548441082 active?
Yes, as of the latest NPPES snapshot, NPI 1548441082 is active (record last updated 2007-11-26).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-11-26.