Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Janelle Balce Knudson

Clinical Social Worker in South San Francisco, CA · enumerated 2018.

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

National Provider Identifier

1215407788

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Registry record

Entity type Individual (Type 1)

Name Janelle Balce Knudson

Sex Female

Practice address 1115 Mission Rd, South San Francisco, CA, 94080

Phone (415) 337-0140

Enumeration date Nov 27, 2018

Last updated in NPPES May 18, 2026

Taxonomy & licenses

172V00000X Community Health Worker Other Service Providers Secondary

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 10111 (CA) Secondary

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LCSW137867 (CA) Primary

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 Janelle Knudson?

Janelle Knudson 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.

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