Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Erin Lang, LMSW
Social Worker in Saint Peters, MO · enumerated 2018.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1699256222
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Registry record
Entity type Individual (Type 1)
Name Erin Lang
Credential LMSW
Sex Female
Practice address 255 Spencer Rd Ste 101, Saint Peters, MO, 63376
Phone (636) 477-6111
Enumeration date Aug 22, 2018
Last updated in NPPES Aug 22, 2018
Taxonomy & licenses
104100000X Social Worker Behavioral Health & Social Service Providers · License 2015033020 (MO) 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 Erin Lang?
The National Provider Identifier (NPI) for Erin Lang is 1699256222, a Type 1 (individual) record in the CMS NPPES registry.
Where does Erin Lang practice?
The practice location on file with NPPES is in Saint Peters, MO. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Megan Helwig Professional Counselor · Saint Peters, MO NPI 1396051124 Liza Kebel Professional Counselor · Saint Peters, MO NPI 1457703860 Grace Hawley Psychologist · Saint Peters, MO NPI 1336674712 Traci Callahan Professional Counselor · Saint Peters, MO NPI 1003344748 Erin Steingruby-Huddleston Clinical Social Worker · Saint Peters, MO NPI 1649708389 Maria Whitter Clinical Social Worker · Saint Peters, MO NPI 1649709510 Angela Johnson Professional Counselor · Saint Peters, MO NPI 1659880771 Eileen Henry Professional Counselor · Saint Peters, MO NPI 1427568906
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-08-22.