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

C. Leigh Benowitz, LICSW, BCD

Clinical Social Worker in Arlington, MA · enumerated 2006.

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

National Provider Identifier

1437170339

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Registry record

Entity type Individual (Type 1)

Name C. Leigh Benowitz

Credential LICSW, BCD

Sex Female

Practice address Arlington, MA, 02474

Phone (781) 641-1029

Fax (781) 641-1029

Enumeration date Jul 23, 2006

Last updated in NPPES Jul 8, 2007

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 106972 (MA) Primary

Other identifiers

Identifier	Type	State	Issuer
372730	Other	MA	MAGELLAN PROVIDER NUMBER
000277988000	Other	-	AETNA PROVIDER NUMBER
PO4434	Other	MA	BC/BS PROVIDER NUMBER

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 C. Leigh Benowitz practice?

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

What is the NPI number for C. Leigh Benowitz?

The National Provider Identifier (NPI) for C. Leigh Benowitz is 1437170339, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.