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

Mark Eldon Bontreger, PSYCHOLOGIST

Individual provider Clinical Psychologist · NPI 1861505190

Mark Eldon Bontreger, PSYCHOLOGIST is a Clinical Psychologist in Watertown, South Dakota. Qualified in 1995, 31 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in South Dakota.

Years since qualifying
31
Licensed in
SD
In the registry since
2006

Practice location Address checks out

525 5th St SE Ste L-13
Watertown, SD 57201-4940
Phone: (605) 882-0800
Fax: (605) 882-0861
Show map & directions

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

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence 364 (SD)

Record details

NPI number1861505190
Entity typeIndividual (Type 1)
GenderMale
Credentials PSYCHOLOGIST
Sole proprietorYes
NPI enumeratedAugust 17, 2006
Last updated in NPPESNovember 2, 2007
Mailing address525 5th St Se, Suite L-13, Watertown, SD 57201-4940

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 1995 (31 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Watertown