Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Grand Rapids Thoracic Surgery, Pllc

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Grand Rapids, MI · enumerated 2015 · authorized official Lourens Willekes, Owner.

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

National Provider Identifier

1336504760

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Grand Rapids Thoracic Surgery, Pllc

Practice address 4500 Cascade Rd Se, Suite 210, Grand Rapids, MI, 49546

Phone (616) 259-7341

Fax (616) 259-7642

Enumeration date Dec 30, 2015

Last updated in NPPES Dec 30, 2015

Taxonomy & classification

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License 4301104138 (MI) Primary

Authorized official

Name Lourens Willekes

Title Owner

Phone (616) 259-7341

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 a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Grand Rapids Thoracic Surgery, Pllc?

Grand Rapids Thoracic Surgery, Pllc is registered in NPPES as a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (its primary provider taxonomy).

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-12-30.