Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Mark A. Major, IDMT

Pharmacist in Maryville, TN · enumerated 2009.

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

National Provider Identifier

1790919892

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Registry record

Entity type Individual (Type 1)

Name Mr. Mark A. Major

Credential IDMT

Sex Male

Practice address 945 Mccammon Ave, Maryville, TN, 37801

Phone (865) 984-1571

Fax (865) 977-9546

Enumeration date May 5, 2009

Last updated in NPPES Apr 8, 2016

Taxonomy & licenses

1710I1003X Independent Duty Medical Technicians Other Service Providers Secondary

183500000X Pharmacist Pharmacy Service Providers · License 39709 (TN) 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

How do I verify Mark Major's NPI record?

Cross-check NPI 1790919892 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1790919892 active?

Yes, as of the latest NPPES snapshot, NPI 1790919892 is active (record last updated 2016-04-08).

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Christy Lucas Pharmacist · Maryville, TN NPI 1407137508

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-04-08.