FIONA THUY THI CHIU MD
NPI 1437759172
Internal Medicine in Fort Collins, CO
About Fiona Thuy Thi Chiu Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
FIONA THUY THI CHIU MD (NPI 1437759172) is an individual internal medicine provider in Fort Collins, Colorado, licensed in Colorado (DR.0074797) and active in the NPI registry since October 2020. She is enrolled in Medicare PECOS and is a graduate of University Of New Mexico School Of Medicine (2022).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Fiona Thuy Thi Chiu Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Fiona Thuy Chiu reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fort Collins, CO 80528
- Reassigned Medicare billing, Colorado enrollment
- 92 clinicians in this Medicare group
Ft Collins, CO 80525
- Reassigned Medicare billing, Colorado enrollment
- 108 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 80528 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 14
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FORT COLLINS, CO 80528
FORT COLLINS, CO 80528
FORT COLLINS, CO 80528
FORT COLLINS, CO 80528
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Fiona Thuy Chiu's NPI number?
The NPI number for Fiona Thuy Chiu is 1437759172. It was assigned to this individual provider in the NPPES registry on October 30, 2020. The provider is also known as Fiona Thuy Thi Nguyen.
Where is Fiona Thuy Chiu located?
Fiona Thuy Chiu practices at 2021 Battlecreek Dr Unit A, Fort Collins, CO 80528. The listed phone number is (970) 818-5725.
What is Fiona Thuy Chiu's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Fiona Thuy Chiu enrolled in Medicare?
Yes. Fiona Thuy Chiu is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Fiona Thuy Chiu's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Fiona Thuy Chiu reassigns Medicare benefits to 2 organizations: Northern Colorado Hospitalists Professional LLC (Fort Collins, CO) and Pathways Hospice (Ft Collins, CO). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Fiona Thuy Chiu's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Fiona Thuy Chiu accept?
Health plans from Select Health list Fiona Thuy Chiu as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Fiona Thuy Chiu was last updated on January 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Fiona Thuy Thi Chiu, MD · NPI 1437759172
Internal Medicine physician in Fort Collins, Colorado. Individual provider, active in the CMS NPPES registry since October 30, 2020.
## Identity
- **NPI:** 1437759172 (Entity type: Individual)
- **Enumerated:** October 30, 2020
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** DR.0074797 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 2021 BATTLECREEK DR UNIT A, Fort Collins, CO 80528-5120
- **Phone:** (970) 818-5725
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Northern Colorado Hospitalists Professional LLC (NPI 1831315662, Fort Collins, CO); Pathways Hospice (NPI 1003520859, Ft Collins, CO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of New Mexico School Of Medicine, class of 2022
## Record status
- **NPPES last updated:** January 29, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1437759172) · Data from the CMS NPPES public registry.