Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark Sinclair, ATC
Athletic Trainer in Monterey, CA · enumerated 2016.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1275992521
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Registry record
Entity type Individual (Type 1)
Name Mark Sinclair
Credential ATC
Sex Male
Practice address 10 Harris Ct, Monterey, CA, 93940
Phone (831) 643-9788
Enumeration date Feb 15, 2016
Last updated in NPPES Feb 15, 2016
Taxonomy & licenses
2255A2300X Athletic Trainer Respiratory, Developmental, Rehabilitative and Restorative Service Providers 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
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 Mark Sinclair?
Mark Sinclair is registered in NPPES with the primary taxonomy of Athletic Trainer. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Monterey Peninsula Orthopaedic and Sports Medicine Institute Family Medicine Physician · Monterey, CA NPI 1538123658 Gregg K. Satow, M.D., A Medical Corporation Orthopaedic Surgery Physician · Monterey, CA NPI 1568670370 Ashley Gabriel Athletic Trainer · Monterey, CA NPI 1932561735 Castlewood Treatment Center West Psychiatric Residential Treatment Facility · Monterey, CA NPI 1497106769 Jose Del Rio Athletic Trainer · Monterey, CA NPI 1619429073
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-02-15.