Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mark L Turk

Q: What type of organization is Mark L Turk?

Mark L Turk is registered in NPPES as a Optometrist (its primary provider taxonomy).

Optometrist in Boaz, AL · enumerated 2011 · authorized official Mark Turk, Owner.

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

National Provider Identifier

1821380916

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Registry record

Entity type Organization (Type 2)

Legal business name Mark L Turk

Practice address 2378 Us Highway 431, Boaz, AL, 35957

Phone (256) 593-4141

Fax (256) 593-1899

Enumeration date May 6, 2011

Last updated in NPPES May 12, 2011

Taxonomy & classification

152W00000X Optometrist Eye and Vision Services Providers Primary

Authorized official

Name Mark Turk

Title Owner

Phone (256) 593-4141

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

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Mark L Turk?

Mark L Turk is registered in NPPES as a Optometrist (its primary provider taxonomy).

Providers at this address

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Mark Turk Optometrist · Boaz, AL NPI 1689645764 Briggs Endeavors LLC Optometrist · Boaz, AL NPI 1467112482

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-05-12.