Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Dennis Richard Brightwell, M.D.

Psychiatry Physician in Crystal Lake, IL · enumerated 2005 · practices at Rosecrance, Inc..

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

National Provider Identifier

1841288420

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Registry record

Entity type Individual (Type 1)

Name Dr. Dennis Richard Brightwell

Credential M.D.

Sex Male

Practice address 422 Tracy Ct, Crystal Lake, IL, 60014

Phone (815) 363-6132

Enumeration date Oct 8, 2005

Last updated in NPPES Jan 15, 2016

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 036103977 (IL) Primary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 56574-20 (WI) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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

What is the NPI number for Dennis Brightwell?

The National Provider Identifier (NPI) for Dennis Brightwell is 1841288420, a Type 1 (individual) record in the CMS NPPES registry.

Where does Dennis Brightwell practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-01-15.