Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mrs. Thecla Ann Rettberg, R.N.,IBCLC,RLC,CIMI
Registered Nurse in Naperville, IL · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1356551162
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Registry record
Entity type Individual (Type 1)
Name Mrs. Thecla Ann Rettberg
Credential R.N.,IBCLC,RLC,CIMI
Sex Female
Practice address 247 Winding Creek Dr, Naperville, IL, 60565
Phone (630) 675-4852
Enumeration date May 23, 2007
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam.
About the RN 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 Thecla Rettberg?
The National Provider Identifier (NPI) for Thecla Rettberg is 1356551162, a Type 1 (individual) record in the CMS NPPES registry.
Where does Thecla Rettberg practice?
The practice location on file with NPPES is in Naperville, IL. Providers can have multiple locations; NPPES lists the primary practice address.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.