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

Dr. Sylvia Duby, M.D.

Rheumatology Physician in Evanston, IL · enumerated 2006.

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

National Provider Identifier

1780659227

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Registry record

Entity type Individual (Type 1)

Name Dr. Sylvia Duby

Credential M.D.

Sex Female

Practice address Evanston, IL, 60201

Phone (847) 869-1400

Enumeration date Feb 20, 2006

Last updated in NPPES Feb 19, 2016

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

Taxonomy & licenses

207RR0500X Rheumatology Physician Allopathic & Osteopathic Physicians · License 036076406 (IL) 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
0031602835	Other	-	BCBS PROVIDER NUMBER
036076406	Other	IL	LICENCE

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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Sylvia Duby?

Sylvia Duby is registered in NPPES with the primary taxonomy of Rheumatology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Evanston Podiatric Surgeons PC Podiatrist · Evanston, IL NPI 1518969344 Mark Gendleman Specialist · Evanston, IL NPI 1457339863 John Rinehart Reproductive Endocrinology Physician · Evanston, IL NPI 1871572867 Joseph Canzona Oral and Maxillofacial Surgery (Dentist) · Evanston, IL NPI 1265411276 Jeffrey Geohas Internal Medicine Physician · Evanston, IL NPI 1609846351 Elizabeth Woo-Strauss Internal Medicine Physician · Evanston, IL NPI 1154392645 Keith Sarpolis Internal Medicine Physician · Evanston, IL NPI 1245283183 North Shore Physicians Group, LLC Internal Medicine Physician · Evanston, IL NPI 1912951492

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-02-19.