NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Marcus D Major Sr., RRT,RCP

Home Health Certified Respiratory Therapist in Oklahoma City, OK · enumerated 2020.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1790301711

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mr. Marcus D Major Sr.
Credential RRT,RCP
Sex Male
Practice address 415 W Wilshire Blvd Ste A, Oklahoma City, OK, 73116
Phone (405) 840-5272
Fax (405) 840-5274
Enumeration date Jun 25, 2020
Last updated in NPPES Jun 25, 2020

Taxonomy & licenses

2278H0200X Home Health Certified Respiratory Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 3537 (OK) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Marcus Major practice?
The practice location on file with NPPES is in Oklahoma City, OK. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Marcus Major?
The National Provider Identifier (NPI) for Marcus Major is 1790301711, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-06-25.