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

Robert D Marks, MD

Individual provider Family Medicine Physician · NPI 1598711673

Robert D Marks, MD is a Family Medicine Physician in Ennis, Montana. Practices as a sole proprietor. Licensed in Montana.

Licensed in
MT
In the registry since
2006
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

305 E Main St
Ennis, MT 59729-9043
Phone: (406) 682-4223
Fax: (406) 682-3874
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 5291 (MT)

Record details

NPI number1598711673
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 26, 2006
Last updated in NPPESMay 29, 2013
Mailing address305 N. Main, Ennis, MT 59729

Other providers in Ennis