Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. Mark Eric Robertson, PT
Physical Therapist in Red Lodge, MT · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1821129495
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Mr. Mark Eric Robertson
Credential PT
Sex Male
Practice address 600 W 21st Street, Red Lodge, MT, 59068
Phone (406) 446-1112
Enumeration date Mar 8, 2007
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 1696 (MT) Primary
PT · Physical Therapist: A licensed movement specialist treating injury and disability through exercise and rehabilitation.
About the PT credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 10573 | Other | MT | HOSPITAL # |
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
Where does Mark Robertson practice?
The practice location on file with NPPES is in Red Lodge, MT. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mark Robertson?
The National Provider Identifier (NPI) for Mark Robertson is 1821129495, a Type 1 (individual) record in the CMS NPPES registry.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.