Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Erin Friesen
Physician Assistant in O Fallon, MO · enumerated 2023.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1255028122
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Registry record
Entity type Individual (Type 1)
Name Erin Friesen
Sex Female
Practice address 2299 Technology Dr Ste 130, O Fallon, MO, 63368
Phone (636) 695-0400
Fax (636) 916-9456
Enumeration date Apr 20, 2023
Last updated in NPPES May 5, 2026
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 2024037659 (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 specialty is Erin Friesen?
Erin Friesen is registered in NPPES with the primary taxonomy of Physician Assistant. 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 →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-05-05.