Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Deborah Michelle Sontag
Nurse Practitioner in Evanston, IL · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1104012855
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Registry record
Entity type Individual (Type 1)
Name Deborah Michelle Sontag
Sex Female
Practice address 1600 Dodge Ave, Evanston, IL, 60201
Phone (847) 424-7265
Fax (847) 492-5809
Enumeration date Sep 17, 2007
Last updated in NPPES Nov 19, 2025
Taxonomy & licenses
363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209006758 (IL) Secondary
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209006758 (IL) Primary
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.
Frequently asked questions
Where does Deborah Sontag 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 Deborah Sontag?
The National Provider Identifier (NPI) for Deborah Sontag is 1104012855, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-19.