KRISTINA ISABEL NGUYEN FNP
NPI 1558127639
Nurse Practitioner in Corona, CA
About Kristina Isabel Nguyen Fnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KRISTINA ISABEL NGUYEN FNP (NPI 1558127639) is an individual nurse practitioner in Corona, California, licensed in California (95029770) and active in the NPI registry since February 2024. She is enrolled in Medicare PECOS, maintains a secondary practice location in Irvine, and is a graduate of Other (2024).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
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
Kristina Isabel Nguyen Fnp 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 Reassignment
Medicare enrollment records show Kristina Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Riverside, CA 92506
- Reassigned Medicare billing, California enrollment
- 30 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 92882 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 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Kristina Nguyen's NPI number?
The NPI number for Kristina Nguyen is 1558127639. It was assigned to this individual provider in the NPPES registry on February 26, 2024.
Where is Kristina Nguyen located?
Kristina Nguyen practices at 110 N Lincoln Ave Ste 100, Corona, CA 92882. The listed phone number is (833) 867-8462.
What is Kristina Nguyen's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Kristina Nguyen enrolled in Medicare?
Yes. Kristina Nguyen 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 organization bills Medicare for Kristina Nguyen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kristina Nguyen reassigns Medicare benefits to Optima Health Corp (Riverside, CA). The 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 Kristina Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Kristina Nguyen was last updated on June 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Kristina Isabel Nguyen, FNP · NPI 1558127639
Nurse Practitioner physician in Corona, California. Individual provider, active in the CMS NPPES registry since February 26, 2024.
## Identity
- **NPI:** 1558127639 (Entity type: Individual)
- **Enumerated:** February 26, 2024
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 95029770 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 110 N LINCOLN AVE STE 100, Corona, CA 92882-1853
- **Phone:** (833) 867-8462
## 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:** Optima Health Corp (NPI 1245892066, Riverside, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2024
## Record status
- **NPPES last updated:** June 29, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1558127639) · Data from the CMS NPPES public registry.