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

James N Dreyfus, MD

Rheumatology Physician in Munster, IN · enumerated 2006.

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

National Provider Identifier

1083673552

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name James N Dreyfus

Credential MD

Sex Male

Practice address Munster, IN, 46321

Phone (219) 670-4421

Enumeration date Mar 22, 2006

Last updated in NPPES Dec 15, 2025

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

Taxonomy & licenses

207RR0500X Rheumatology Physician Allopathic & Osteopathic Physicians · License 01032593 (IN) Primary

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

Other identifiers

Identifier	Type	State	Issuer
200044440A	Medicaid	IN	-

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 James Dreyfus?

The National Provider Identifier (NPI) for James Dreyfus is 1083673552, a Type 1 (individual) record in the CMS NPPES registry.

Where does James Dreyfus practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-15.