Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Gail A. Maionchi, FNP
Nurse Practitioner in Lisle, IL · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1639112360
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Registry record
Entity type Individual (Type 1)
Name Ms. Gail A. Maionchi
Credential FNP
Sex Female
Practice address 430 Warrenville Rd Ste 210, Lisle, IL, 60532
Phone (630) 873-8875
Enumeration date Jun 13, 2006
Last updated in NPPES Feb 5, 2019
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 041276023 (IL) Primary
363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209-004896 (IL) Secondary
FNP · Family Nurse Practitioner: A nurse practitioner certified in family practice across the lifespan.
About the FNP 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.
Frequently asked questions
What is the NPI number for Gail Maionchi?
The National Provider Identifier (NPI) for Gail Maionchi is 1639112360, a Type 1 (individual) record in the CMS NPPES registry.
Where does Gail Maionchi practice?
The practice location on file with NPPES is in Lisle, IL. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Richard Krouse Internal Medicine Physician · Lisle, IL NPI 1881661759 Christina Bratis Internal Medicine Physician · Lisle, IL NPI 1750593182 Kate Hoppock Internal Medicine Physician · Lisle, IL NPI 1407122419 Linda Beatty Clinical Social Worker · Lisle, IL NPI 1396112710 Sally Salman Internal Medicine Physician · Lisle, IL NPI 1003266297 April Gallik Nurse Practitioner · Lisle, IL NPI 1134720436
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-02-05.