Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mark'S Clinical Services LLC

Q: What is the NPI number for Mark'S Clinical Services LLC?

The NPI for Mark'S Clinical Services LLC is 1831821321, a Type 2 (organization) record in the CMS NPPES registry.

Family Medicine Physician in Oneida, TN · enumerated 2022 · authorized official Mark Byrd, Owner.

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

National Provider Identifier

1831821321

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Registry record

Entity type Organization (Type 2)

Legal business name Mark'S Clinical Services LLC

Practice address 205 E 3rd Ave Ste A, Oneida, TN, 37841

Phone (423) 569-7800

Fax (423) 569-7801

Enumeration date Jun 24, 2022

Last updated in NPPES Jun 24, 2022

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Mark Byrd

Title Owner

Phone (423) 319-7924

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

Who is the authorized official for Mark'S Clinical Services LLC?

NPPES lists Mark Byrd (Owner) as the authorized official for this organization.

What is the NPI number for Mark'S Clinical Services LLC?

The NPI for Mark'S Clinical Services LLC is 1831821321, a Type 2 (organization) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-06-24.