Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Elisabeth Van Der Kolk, L.I.C.S.W.

Clinical Social Worker in Watertown, MA · enumerated 2007.

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

National Provider Identifier

1487773404

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Registry record

Entity type Individual (Type 1)

Name Ms. Elisabeth Van Der Kolk

Credential L.I.C.S.W.

Sex Female

Practice address 23 Main St, Watertown, MA, 02472

Phone (617) 312-4116

Enumeration date Mar 29, 2007

Last updated in NPPES Jul 24, 2013

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 102645 (MA) Primary

Other identifiers

Identifier	Type	State	Issuer
459408	Other	MA	TUFTS HEALTH PLAN
VAP03254	Other	MA	BLUE CROSS BLUE SHIELD

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

What specialty is Elisabeth Van Der Kolk?

Elisabeth Van Der Kolk is registered in NPPES with the primary taxonomy of Clinical Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

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Eleanor Egan Mental Health Counselor · Watertown, MA NPI 1811945843 Jose Augusto Hidalgo Psychiatry Physician · Watertown, MA NPI 1013964899 Lori Cignarella Clinical Social Worker · Watertown, MA NPI 1952488553 Deirdre Fay Clinical Social Worker · Watertown, MA NPI 1497813299 Janina Fisher Clinical Psychologist · Watertown, MA NPI 1851458772 Hilary Graham Mental Health Counselor · Watertown, MA NPI 1700912037 Ellis Weaver Mental Health Counselor · Watertown, MA NPI 1508328212 Liz Loveless Lmhc Adolescent and Children Mental Health Clinic/Center · Watertown, MA NPI 1407620420

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-07-24.