Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Roland Williby Jr., M.D.

Obstetrics & Gynecology Physician in Elgin, IL · enumerated 2010.

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

National Provider Identifier

1235439514

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Registry record

Entity type Individual (Type 1)

Name Roland Williby Jr.

Credential M.D.

Sex Male

Practice address 620 Wing Street, Elgin, IL, 60123

Phone (847) 717-6455

Fax (847) 488-9142

Enumeration date Nov 2, 2010

Last updated in NPPES Apr 5, 2021

Taxonomy & licenses

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License 036122702 (IL) Primary

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

How do I verify Roland Williby's NPI record?

Cross-check NPI 1235439514 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1235439514 active?

Yes, as of the latest NPPES snapshot, NPI 1235439514 is active (record last updated 2021-04-05).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-05.