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

Gillian Marcus, LMFT

Marriage & Family Therapist in Los Angeles, CA · enumerated 2007 · practices at The Sexual Recovery Institute.

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

National Provider Identifier

1528287208

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Registry record

Entity type Individual (Type 1)

Name Gillian Marcus

Credential LMFT

Sex Female

Practice address Los Angeles, CA, 90035

Phone (323) 487-0408

Fax (610) 514-5982

Enumeration date Apr 24, 2007

Last updated in NPPES May 18, 2018

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

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 42651 (CA) Primary

LMFT · Licensed Marriage and Family Therapist: A licensed therapist specializing in relational and family psychotherapy. About the LMFT credential

Other identifiers

Identifier	Type	State	Issuer
42651	Other	CA	LICENSED MFT

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

How do I verify Gillian Marcus's NPI record?

Cross-check NPI 1528287208 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1528287208 active?

Yes, as of the latest NPPES snapshot, NPI 1528287208 is active (record last updated 2018-05-18).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-05-18.