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

Margaret K Cwieka, RN, BSN

Nutrition Education Nutritionist in Osterville, MA · enumerated 2008.

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

National Provider Identifier

1881840643

Verified

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Registry record

Entity type Individual (Type 1)

Name Margaret K Cwieka

Credential RN, BSN

Sex Female

Practice address Osterville, MA, 02655

Phone (508) 420-9337

Enumeration date Aug 13, 2008

Last updated in NPPES Aug 13, 2008

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

Taxonomy & licenses

133NN1002X Nutrition Education Nutritionist Dietary & Nutritional Service Providers · License 95844 (MA) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN 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

Is NPI 1881840643 active?

Yes, as of the latest NPPES snapshot, NPI 1881840643 is active (record last updated 2008-08-13).

How do I verify Margaret Cwieka's NPI record?

Cross-check NPI 1881840643 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-08-13.