NPI Portal NPI Lookup & Verification

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

Ms. Linda Siemer, LCSW-R

Clinical Social Worker in Middletown, NY · enumerated 2007.

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

National Provider Identifier

1225159387

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Registry record

Entity type Individual (Type 1)
Name Ms. Linda Siemer
Credential LCSW-R
Sex Female
Practice address Middletown, NY, 10940
Phone (845) 551-6075
Fax (845) 344-5699
Enumeration date Apr 3, 2007
Last updated in NPPES May 10, 2018

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 R042063-1 (NY) 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.

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Frequently asked questions

Where does Linda Siemer practice?
The practice location on file with NPPES is in Middletown, NY. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Linda Siemer?
The National Provider Identifier (NPI) for Linda Siemer is 1225159387, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-05-10.