Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Carolin Jane Holwerda

Specialist in Grand Rapids, MI · enumerated 2012.

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

National Provider Identifier

1932472057

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Registry record

Entity type Individual (Type 1)

Name Mrs. Carolin Jane Holwerda

Sex Female

Practice address 1490 E Beltline Ave Se, Grand Rapids, MI, 49506

Phone (616) 940-0040

Enumeration date Feb 21, 2012

Last updated in NPPES Feb 21, 2012

Taxonomy & licenses

174400000X Specialist 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

Where does Carolin Holwerda practice?

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

What is the NPI number for Carolin Holwerda?

The National Provider Identifier (NPI) for Carolin Holwerda is 1932472057, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-02-21.