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

Ms. Margo Karen Thelander, MS, CGC

Genetic Counselor (M.S.) in Walnut Creek, CA · enumerated 2006.

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

National Provider Identifier

1316978216

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Registry record

Entity type Individual (Type 1)

Name Ms. Margo Karen Thelander

Credential MS, CGC

Sex Female

Practice address Walnut Creek, CA, 94598

Phone (925) 674-2581

Enumeration date Jul 6, 2006

Last updated in NPPES Apr 28, 2009

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

Taxonomy & licenses

170300000X Genetic Counselor (M.S.) Other Service Providers 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 is the NPI number for Margo Thelander?

The National Provider Identifier (NPI) for Margo Thelander is 1316978216, a Type 1 (individual) record in the CMS NPPES registry.

Where does Margo Thelander practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-04-28.