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

Erhan Guler, MD

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Winfield, IL · enumerated 2021.

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

National Provider Identifier

1275121477

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Registry record

Entity type Individual (Type 1)
Name Erhan Guler
Credential MD
Sex Male
Practice address Winfield, IL, 60190
Phone (630) 933-4480
Fax (630) 933-6009
Enumeration date Jan 4, 2021
Last updated in NPPES Nov 13, 2023

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

Taxonomy & licenses

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License 35.147107 (OH) Secondary
208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License 036165657 (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.

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Frequently asked questions

Where does Erhan Guler practice?
The practice location on file with NPPES is in Winfield, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Erhan Guler?
The National Provider Identifier (NPI) for Erhan Guler is 1275121477, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-11-13.