Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mrs. Mari-Margaret Celeste Tydingco, OT
Occupational Therapist in Sitka, AK · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1164186821
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Mrs. Mari-Margaret Celeste Tydingco
Credential OT
Sex Female
Practice address 118 Jacobs Cir, Sitka, AK, 99835
Phone (907) 738-0923
Enumeration date Oct 28, 2021
Last updated in NPPES Oct 28, 2021
Taxonomy & licenses
225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License PHYO1574 (AK) Primary
OT · Occupational Therapist: A licensed therapist helping patients develop or recover skills for daily living and working.
About the OT 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 Mari-Margaret Tydingco?
Mari-Margaret Tydingco is registered in NPPES with the primary taxonomy of Occupational Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-10-28.