Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Gregory Alan Nichols, RN, MSN, FNP-BC

Nurse Practitioner in Westchester, IL · enumerated 2011.

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

National Provider Identifier

1669771861

Verified

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Registry record

Entity type Individual (Type 1)

Name Mr. Gregory Alan Nichols

Credential RN, MSN, FNP-BC

Sex Male

Practice address 1 Westbrook Corporate Ctr Ste 300, Westchester, IL, 60154

Phone (866) 949-0108

Enumeration date Mar 28, 2011

Last updated in NPPES Apr 18, 2022

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209.008721 (IL) Secondary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209008721 (IL) Primary

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

Other identifiers

Identifier	Type	State	Issuer
1770860124	Other	IL	NPI

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 Gregory Nichols practice?

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

What is the NPI number for Gregory Nichols?

The National Provider Identifier (NPI) for Gregory Nichols is 1669771861, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-04-18.