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

Mrs. Joan E Greenfield, MA LPC LLP LMSW

Clinical Social Worker in Farmington Hills, MI · enumerated 2007.

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

National Provider Identifier

1508923699

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Registry record

Entity type Individual (Type 1)

Name Mrs. Joan E Greenfield

Credential MA LPC LLP LMSW

Sex Female

Practice address Farmington Hills, MI, 48334

Phone (248) 855-5959

Fax (248) 855-5959

Enumeration date Jan 2, 2007

Last updated in NPPES Jun 1, 2016

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

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 6401009826 (MI) Secondary

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License 6401009826 (MI) Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License 6301003756 (MI) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 6801011657 (MI) Primary

Other identifiers

Identifier	Type	State	Issuer
4227463	Other	MI	AETNA
246779000	Other	MI	MAGELLAN

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

Where does Joan Greenfield practice?

The practice location on file with NPPES is in Farmington Hills, MI. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Joan Greenfield?

The National Provider Identifier (NPI) for Joan Greenfield is 1508923699, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Michele Bordeau Williams Ms, LLP Community/Behavioral Health Agency · Farmington Hills, MI NPI 1932358371 Mindful Psychotherapy Services PC Psychologist · Farmington Hills, MI NPI 1851889430

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-06-01.