Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark Dale Messer, D.O.
Psychiatry Physician in Terrell, TX · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1730246273
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Registry record
Entity type Individual (Type 1)
Name Mark Dale Messer
Credential D.O.
Sex Male
Practice address 1200 E Brin St, Terrell, TX, 75160
Phone (972) 551-8426
Fax (972) 551-8053
Enumeration date Jan 3, 2007
Last updated in NPPES Jul 9, 2010
Taxonomy & licenses
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD.
About the DO 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.
Frequently asked questions
Where does Mark Messer practice?
The practice location on file with NPPES is in Terrell, TX. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mark Messer?
The National Provider Identifier (NPI) for Mark Messer is 1730246273, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-07-09.