Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Gillian K Long, FNP-C
Nurse Practitioner in Alton, IL · enumerated 2019.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1790345726
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Registry record
Entity type Individual (Type 1)
Name Gillian K Long
Credential FNP-C
Sex Female
Practice address 1 Professional Dr, Alton, IL, 62002
Phone (618) 463-8500
Fax (618) 433-6792
Enumeration date Jun 20, 2019
Last updated in NPPES Sep 19, 2025
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209018721 (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
What is the NPI number for Gillian Long?
The National Provider Identifier (NPI) for Gillian Long is 1790345726, a Type 1 (individual) record in the CMS NPPES registry.
Where does Gillian Long practice?
The practice location on file with NPPES is in Alton, IL. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Tariq Quadri Internal Medicine Physician · Alton, IL NPI 1275525271 Erik Stabell Internal Medicine Physician · Alton, IL NPI 1609868108 James Kliefoth Surgery Physician · Alton, IL NPI 1043203250 Kelly Lindsey Pediatrics Physician · Alton, IL NPI 1225021165 Myles Yanta Pulmonary Disease Physician · Alton, IL NPI 1952394892 Kristen Stabell Internal Medicine Physician · Alton, IL NPI 1689667529 William Bartley Internal Medicine Physician · Alton, IL NPI 1134112097 Maudie Miller Surgery Physician · Alton, IL NPI 1740274992
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-19.