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

Guy Mason Marshall, RD

Individual provider Registered Dietitian · NPI 1982413597

Guy Mason Marshall, RD is a Registered Dietitian in Castle Pines, Colorado. Practices as a sole proprietor. Licensed in Colorado.

Licensed in
CO
In the registry since
2025
What do these letters mean?
RD — Registered Dietitian
A credentialed nutrition professional.

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Practice location Address checks out

1299 Sweet River Cir
Castle Pines, CO 80108-9669
Phone: (540) 623-4878
Show map & directions

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

Specialties & licences

Registered Dietitian (primary) Taxonomy 133V00000X · Licence 86290217 (CO)

Record details

NPI number1982413597
Entity typeIndividual (Type 1)
GenderMale
Credentials RD
Sole proprietorYes
NPI enumeratedJanuary 7, 2025
Last updated in NPPESJanuary 7, 2025
Certification dateJanuary 7, 2025
Mailing address1299 Sweet River Cir Apt 404, Castle Pines, CO 80108-9673

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