Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

John M. Vierling, MD

Individual provider Internal Medicine Physician · NPI 1043390388

John M. Vierling, MD is an Internal Medicine Physician in Houston, Texas. Licensed in Texas. Registered with an NPI since 2006.

Licensed in
TX
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

6620 Main St
Houston, TX 77030-2348
Phone: (713) 798-2500
Fax: (713) 798-2505
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence M8457 (TX)
Internal Medicine Physician Taxonomy 207R00000X · Licence M8457 (TX)

Record details

NPI number1043390388
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 17, 2006
Last updated in NPPESDecember 12, 2023
Certification dateDecember 12, 2023

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