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Mark Byron Jennings, MD

Internal Medicine Physician in Allen, TX · enumerated 2009.

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

National Provider Identifier

1336379783

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Registry record

Entity type Individual (Type 1)
Name Mark Byron Jennings
Credential MD
Sex Male
Practice address 1105 Central Expy N Ste 235, Allen, TX, 75013
Phone (972) 747-6042
Fax (972) 747-6043
Enumeration date Jul 20, 2009
Last updated in NPPES Sep 12, 2012

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License P1880 (TX) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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.

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Frequently asked questions

Where does Mark Jennings practice?
The practice location on file with NPPES is in Allen, TX. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mark Jennings?
The National Provider Identifier (NPI) for Mark Jennings is 1336379783, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-09-12.