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

John Holbrook Chalmers Jr., MD

Individual provider Diagnostic Radiology Physician · NPI 1326023896

John Holbrook Chalmers Jr., MD is a Diagnostic Radiology Physician in Tyler, Texas. Licensed in Texas. Registered with an NPI since 2005.

Licensed in
TX
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

11937 US Highway 271
Tyler, TX 75708-3154
Phone: (903) 877-3451
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence D6981 (TX)

Record details

NPI number1326023896
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 7, 2005
Last updated in NPPESJuly 13, 2026

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