TIFFANY KIM NIELSEN MSN, FNP-C, RN
NPI 1639519473
Nurse Practitioner - Family in Long Beach, CA
About Tiffany Kim Nielsen Msn, Fnp-c, Rn NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TIFFANY KIM NIELSEN MSN, FNP-C, RN (NPI 1639519473) is an individual family provider in Long Beach, California, licensed in California (23678) and active in the NPI registry since June 2013. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Tiffany Kim Nielsen Msn, Fnp-c, Rn is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
5Medicare enrollment records show Tiffany Nielsen reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Long Beach, CA 90806
- Reassigned Medicare billing, California enrollment
- 75 clinicians in this Medicare group
Anaheim, CA 92801
- Reassigned Medicare billing, California enrollment
- 255 clinicians in this Medicare group
Whittier, CA 90605
- Reassigned Medicare billing, California enrollment
- 61 clinicians in this Medicare group
Fountain Valley, CA 92708
- Reassigned Medicare billing, California enrollment
- 948 clinicians in this Medicare group
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 114 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 90806 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LONG BEACH, CA 90806
LONG BEACH, CA 90806
LONG BEACH, CA 90806
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 Tiffany Nielsen's NPI number?
The NPI number for Tiffany Nielsen is 1639519473. It was assigned to this individual provider in the NPPES registry on June 25, 2013.
Where is Tiffany Nielsen located?
Tiffany Nielsen practices at 2801 Atlantic Ave Emergency Department, Long Beach, CA 90806. The listed phone number is (562) 933-1400.
What is Tiffany Nielsen's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Tiffany Nielsen enrolled in Medicare?
Yes. Tiffany Nielsen is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Tiffany Nielsen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tiffany Nielsen reassigns Medicare benefits to 5 organizations: Columbia Emergency Medical Group Inc (Long Beach, CA), University Of California Irvine (Anaheim, CA), East Valley Emergency Medical Associates, Inc (Whittier, CA), Memorialcare Medical Foundation (Fountain Valley, CA) and Regents Of The University Of (Orange, CA). 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 Tiffany Nielsen'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 Tiffany Nielsen was last updated on September 20, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years 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.
# Tiffany Kim Nielsen, MSN, FNP-C, RN · NPI 1639519473
Family physician in Long Beach, California. Individual provider, active in the CMS NPPES registry since June 25, 2013.
## Identity
- **NPI:** 1639519473 (Entity type: Individual)
- **Enumerated:** June 25, 2013
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 23678 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2801 ATLANTIC AVE, EMERGENCY DEPARTMENT, Long Beach, CA 90806-1701
- **Phone:** (562) 933-1400
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Columbia Emergency Medical Group Inc (NPI 1871551119, Long Beach, CA); University Of California Irvine (NPI 1598790529, Anaheim, CA); East Valley Emergency Medical Associates, Inc (NPI 1346287430, Whittier, CA); Memorialcare Medical Foundation (NPI 1205167350, Fountain Valley, CA); Regents Of The University Of (NPI 1366590762, Orange, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 20, 2013
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Source: [NPI Profile](https://npiprofile.com/npi/1639519473) · Data from the CMS NPPES public registry.