NPIMap

Individual provider Active NPI

Fiona Thuy Thi Chiu, MD

  • Internal Medicine Physician
  • Fort Collins, CO
National Provider Identifier
1437759172
Registry record updated Jan 29, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
DR.0074797 Issued in CO
Practice address
2021 Battlecreek Dr Unit a
Fort Collins, CO 80528-5120
Phone
(970) 818-5725
NPI assigned
Oct 30, 2020
Last updated
Jan 29, 2026By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jan 29, 2026

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X DR.0074797 CO Primary

Addresses

Primary practice location

2021 Battlecreek Dr Unit a
Fort Collins, CO 80528-5120

Mailing address

2021 Battlecreek Dr Unit a
Fort Collins, CO 80528-5120

Other names 1

  • Fiona Thuy Thi Nguyen Former name

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CO
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20250605002537 CO Practitioner - Internal Medicine 4981084225 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
University of New Mexico School of Medicine, 2022
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Northern Colorado Hospitalists Professional LLCGroup PAC ID 8325147507, 85 clinicians

Practice addresses (Care Compare)

1024 S Lemay Ave
Poudre Valley Hospital
Fort Collins, CO 80524-3929
Phone (970) 495-7142

2500 Rocky Mountain Ave
Loveland, CO 80538-9004
Phone (970) 624-2500

6767 29TH St
Greeley, CO 80634-5474
Phone (970) 495-7153

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
DR.0074797COMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Pathways Hospice Internal Medicine Current Accepting new patients
Pathways Hospice CurrentSince Sep 1, 2025 Accepting new patients
Pathways Hospice Internal Medicine CurrentSince Sep 1, 2025 Accepting new patients
Northern Colorado Hospitalists Professional LLC CurrentSince Jul 1, 2025 Accepting new patients
Medical Center of the Rockies Past Accepting new patients
Uchealth Greeley Hospital Past Accepting new patients

Locations

8289 E Lowry Blvd
Denver, CO 80230
Phone (303) 321-2828

1024 S Lemay Ave
Fort Collins, CO 80524
Phone (970) 495-7000

2021 Battlecreek Dr
Unit A
Fort Collins, CO 80528
Phone (720) 770-0259

305 Carpenter Rd
Fort Collins, CO 80525
Phone (970) 663-3500

317 Carpenter Rd
Fort Collins, CO 80525
Phone (970) 663-3500

2500 Rocky Mountain Ave
Loveland, CO 80538
Phone (970) 297-6425

Organizations & group practices 6

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.

Hospital & facility affiliations 21

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

View all 21

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1604016000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1769644800000",
    "number": "1437759172",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2021 BATTLECREEK DR UNIT A",
            "city": "FORT COLLINS",
            "state": "CO",
            "postal_code": "805285120"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2021 BATTLECREEK DR UNIT A",
            "city": "FORT COLLINS",
            "state": "CO",
            "postal_code": "805285120",
            "telephone_number": "970-818-5725"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CHIU",
        "first_name": "FIONA THUY",
        "middle_name": "THI",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2020-10-30",
        "last_updated": "2026-01-29",
        "certification_date": "2026-01-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CO",
            "license": "DR.0074797",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "FIONA THUY",
            "last_name": "NGUYEN",
            "middle_name": "THI",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

Other providers in Fort Collins, CO

Sources for this page

Verify at the official NPI Registry.