NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mark Lowell Yelderman, M.D.

Occupational Medicine Physician in Addison, TX · enumerated 2011.

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

National Provider Identifier

1386933109

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Registry record

Entity type Individual (Type 1)
Name Mark Lowell Yelderman
Credential M.D.
Sex Male
Practice address Addison, TX, 75001
Phone (855) 835-6337
Fax (844) 371-8990
Enumeration date Apr 1, 2011
Last updated in NPPES Nov 16, 2021

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

2083X0100X Occupational Medicine Physician Allopathic & Osteopathic Physicians · License 1973 (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

Is NPI 1386933109 active?
Yes, as of the latest NPPES snapshot, NPI 1386933109 is active (record last updated 2021-11-16).
How do I verify Mark Yelderman's NPI record?
Cross-check NPI 1386933109 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-11-16.