Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mark I. Segal, LLC

Clinical Social Worker in Crofton, MD · enumerated 2012 · authorized official Mark Segal, Owner.

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

National Provider Identifier

1710231980

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Registry record

Entity type Organization (Type 2)

Legal business name Mark I. Segal, LLC

Practice address 931 Truro Ln, Crofton, MD, 21114

Phone (443) 292-4164

Enumeration date Nov 9, 2012

Last updated in NPPES Nov 9, 2012

Taxonomy & classification

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 11838 (MD) Primary

Authorized official

Name Mark Segal

Title Owner

Phone (443) 292-4164

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.

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Frequently asked questions

Where is Mark I. Segal, LLC located?

The practice location on file with NPPES is in Crofton, MD.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2012-11-09. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Mark Segal Clinical Social Worker · Crofton, MD NPI 1154591527

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-11-09.