Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Katherine D Siebert, F.N.P.
Nurse Practitioner in Arnold, MO · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1861585689
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Registry record
Entity type Individual (Type 1)
Name Katherine D Siebert
Credential F.N.P.
Sex Female
Practice address 3619 Richardson Square Dr., Suite 170, Arnold, MO, 63010
Phone (636) 717-6776
Fax (314) 525-4055
Enumeration date Oct 2, 2006
Last updated in NPPES Mar 14, 2017
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 063255 (MO) Primary
FNP · Family Nurse Practitioner: A nurse practitioner certified in family practice across the lifespan.
About the FNP credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 428989305 | Medicaid | MO | - |
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
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.
What specialty is Katherine Siebert?
Katherine Siebert is registered in NPPES with the primary taxonomy of Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Sheryl Ream Family Medicine Physician · Arnold, MO NPI 1811989551 Alan Sandidge Family Medicine Physician · Arnold, MO NPI 1427025295 Mary Chitwood Family Medicine Physician · Arnold, MO NPI 1376504621 Kurmanadha Chadalawada Internal Medicine Physician · Arnold, MO NPI 1396771606 Medwin Primary Care L.L.C. Internal Medicine Physician · Arnold, MO NPI 1376552067 Evelyn Young Emergency Medicine Physician · Arnold, MO NPI 1790894830 Heather Haegele Family Nurse Practitioner · Arnold, MO NPI 1962595710 Fariha Qayum Family Medicine Physician · Arnold, MO NPI 1255426961
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-03-14.