Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. Charles S Lederman, MSW LCSW
Social Worker in Oswego, IL · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1629143896
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Registry record
Entity type Individual (Type 1)
Name Mr. Charles S Lederman
Credential MSW LCSW
Sex Male
Practice address 68 Main St, Oswego, IL, 60543
Phone (630) 269-3146
Fax (630) 551-0988
Enumeration date Nov 22, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
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 specialty is Charles Lederman?
Charles Lederman is registered in NPPES with the primary taxonomy of Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
Browse all → Sherry Bryant Marriage & Family Therapist · Oswego, IL NPI 1275679706 Lori Sims Clinical Social Worker · Oswego, IL NPI 1154575660 Sally Strosahl Professional Counselor · Oswego, IL NPI 1619209079 Casey Woodham Counselor · Oswego, IL NPI 1225347222 Michelle Moses Clinical Social Worker · Oswego, IL NPI 1700156114
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.