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

Martha Jean Osterberg, L.I.C.S.W.

Clinical Social Worker in Minneapolis, MN · enumerated 2007 · practices at Lyn-Lake Psychotherapy and Wellness, Ltd..

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

National Provider Identifier

1821141888

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Registry record

Entity type Individual (Type 1)

Name Martha Jean Osterberg

Credential L.I.C.S.W.

Sex Female

Practice address Minneapolis, MN, 55408

Phone (612) 822-3417

Enumeration date Jan 20, 2007

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 10825 (MN) Primary

Other identifiers

Identifier	Type	State	Issuer
16D66OS	Other	MN	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 is the NPI number for Martha Osterberg?

The National Provider Identifier (NPI) for Martha Osterberg is 1821141888, a Type 1 (individual) record in the CMS NPPES registry.

Where does Martha Osterberg practice?

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

Other providers at this practice address

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