Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Theresa Didion, RN
Registered Nurse in Castalia, OH · enumerated 2024.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1336976893
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Registry record
Entity type Individual (Type 1)
Name Theresa Didion
Credential RN
Sex Female
Practice address 4317 St Rt 269 S, Castalia, OH, 44824
Phone (567) 290-2658
Fax (567) 246-2424
Enumeration date Sep 18, 2024
Last updated in NPPES Sep 18, 2024
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
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 Theresa Didion?
Theresa Didion is registered in NPPES with the primary taxonomy of Registered Nurse. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Jordan Norman Licensed Practical Nurse · Castalia, OH NPI 1689409971 Dezaniq Grantham Case Manager/Care Coordinator · Castalia, OH NPI 1881418762 John Ferguson Case Manager/Care Coordinator · Castalia, OH NPI 1689498560 Joshua Lesch Case Manager/Care Coordinator · Castalia, OH NPI 1669296281 Cora Scarberry Case Manager/Care Coordinator · Castalia, OH NPI 1861216988 Kirsten Ryan Registered Nurse · Castalia, OH NPI 1801610951 Stephanie Roy Case Manager/Care Coordinator · Castalia, OH NPI 1043034192 Katherine Brisson Case Manager/Care Coordinator · Castalia, OH NPI 1710702741
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-09-18.