Active NPI
Guy Mason Marshall, RD
- Registered Dietitian
- Castle Pines, CO
National Provider Identifier
1982413597
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Registered Dietitian
- License
- 86290217
- Practice address
- 1299 Sweet River Cir
Castle Pines, CO 80108-9669 - Phone
- (540) 623-4878
- NPI assigned
- Jan 7, 2025
- Last updated
- Jan 7, 2025
- Sex
- Male
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Registered Dietitian | 133V00000X | 86290217 | CO | Primary |
Addresses
Primary practice location
1299 Sweet River Cir
Castle Pines, CO 80108-9669
Mailing address
1299 Sweet River Cir Apt 404
Castle Pines, CO 80108-9673
Phone (540) 623-4878
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Not enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 86290217 | CO | MD | Registered Dietitian |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Fay Nutrition | Dietitian, Registered | Past | Accepting new patients |
Organizations & group practices 1
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1736208000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1736208000000",
"number": "1982413597",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "1299 SWEET RIVER CIR APT 404",
"city": "CASTLE PINES",
"state": "CO",
"postal_code": "801089673",
"telephone_number": "540-623-4878"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1299 SWEET RIVER CIR",
"city": "CASTLE PINES",
"state": "CO",
"postal_code": "801089669",
"telephone_number": "540-623-4878"
}
],
"practiceLocations": [],
"basic": {
"last_name": "MARSHALL",
"first_name": "GUY",
"middle_name": "MASON",
"credential": "RD",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2025-01-07",
"last_updated": "2025-01-07",
"certification_date": "2025-01-07",
"status": "A"
},
"taxonomies": [
{
"code": "133V00000X",
"taxonomy_group": "",
"desc": "Dietitian, Registered",
"state": "CO",
"license": "86290217",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Castle Pines, CO
- Myrian Lewis
- Elisabeth Susanne Littleton, AGCNS-BC, APRXN
- John David Lobue Jr., LPC
- Corwin Marcetti
- Kristin Jarvis Marrs, LCSW
- Martin Therapy Solutions
- Aaron Christopher Martin, M.S.P.T.
- Jaime McNitt, PA-C
- Medventures, PLLC (Castle Pines Urgent Care)
- Metrowest Eye Associates, P.C. (Black Diamond Eye Care)
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 7, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.