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

Dr. Cassandra Lynn Marsden, DC

Chiropractor in Mountain View, CA · enumerated 2015.

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

National Provider Identifier

1841665957

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Registry record

Entity type Individual (Type 1)

Name Dr. Cassandra Lynn Marsden

Credential DC

Sex Female

Practice address Mountain View, CA, 94040

Phone (650) 450-0215

Enumeration date Dec 1, 2015

Last updated in NPPES Dec 1, 2015

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

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 33203 (CA) Primary

DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

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 Cassandra Marsden practice?

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

What is the NPI number for Cassandra Marsden?

The National Provider Identifier (NPI) for Cassandra Marsden is 1841665957, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Linda Paris-Bell Chiropractor · Mountain View, CA NPI 1134236839 Judith Thurber Chiropractor · Mountain View, CA NPI 1356439871

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-12-01.