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

Dr. Vasilis K Siomopoulos, M.D., DOB: 06/23/193

Community Health Clinic/Center in Evanston, IL · enumerated 2007.

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

National Provider Identifier

1801949813

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Registry record

Entity type Individual (Type 1)
Name Dr. Vasilis K Siomopoulos
Credential M.D., DOB: 06/23/193
Sex Male
Practice address Evanston, IL, 60202
Phone (847) 724-6513
Fax (847) 724-6513
Enumeration date Jan 21, 2007
Last updated in NPPES Oct 6, 2014

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

Taxonomy & licenses

261QC1500X Community Health Clinic/Center Ambulatory Health Care Facilities · License 036045374 (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 Vasilis Siomopoulos practice?
The practice location on file with NPPES is in Evanston, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Vasilis Siomopoulos?
The National Provider Identifier (NPI) for Vasilis Siomopoulos is 1801949813, 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 2014-10-06.