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

Ms. Charlene Mayson Portnoy, LICSW LMFT

Clinical Social Worker in St Louis Park, MN · enumerated 2007 · practices at Charlene Portnoy LLC.

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

National Provider Identifier

1578691606

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Registry record

Entity type Individual (Type 1)

Name Ms. Charlene Mayson Portnoy

Credential LICSW LMFT

Sex Female

Practice address St Louis Park, MN, 55426

Phone (612) 760-2859

Fax (612) 926-8915

Enumeration date Mar 1, 2007

Last updated in NPPES Sep 20, 2016

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 01769 (MN) Primary

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 0361 (MN) Secondary

Other identifiers

Identifier	Type	State	Issuer
158T5P0	Other	MN	BLUE CROSS BLUE SHIELD
6299260	Other	MN	MEDICA

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

What is the NPI number for Charlene Portnoy?

The National Provider Identifier (NPI) for Charlene Portnoy is 1578691606, a Type 1 (individual) record in the CMS NPPES registry.

Where does Charlene Portnoy practice?

The practice location on file with NPPES is in St Louis Park, MN. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Charlene Portnoy LLC Clinical Social Worker · St Louis Park, MN NPI 1780172569

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-09-20.