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

Dr. Grzegorz Bigaj, DN, LAC

Acupuncturist in Niles, IL · enumerated 2007.

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

National Provider Identifier

1629190426

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Grzegorz Bigaj

Credential DN, LAC

Sex Male

Practice address Niles, IL, 60714

Phone (773) 879-7401

Enumeration date Apr 4, 2007

Last updated in NPPES Oct 21, 2021

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

Taxonomy & licenses

172P00000X Naprapath Other Service Providers · License 181000300 (IL) Secondary

171100000X Acupuncturist Other Service Providers · License 198001505 (IL) Primary

LAC · Licensed Acupuncturist: A practitioner licensed to perform acupuncture. About the LAC credential

Other identifiers

Identifier	Type	State	Issuer
1633330	Other	IL	BCBS

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 Grzegorz Bigaj?

The National Provider Identifier (NPI) for Grzegorz Bigaj is 1629190426, a Type 1 (individual) record in the CMS NPPES registry.

Where does Grzegorz Bigaj practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-10-21.