MRS. THERESE MARIEL FONSECA FNP
NPI 1902629348
Nurse Practitioner - Family in Lancaster, CA
About Mrs. Therese Mariel Fonseca Fnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. THERESE MARIEL FONSECA FNP (NPI 1902629348) is an individual family provider in Lancaster, California, licensed in California (95032530) and active in the NPI registry since November 2024. 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)
Mrs. Therese Mariel Fonseca Fnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Therese Fonseca reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Lancaster, CA 93535
- Reassigned Medicare billing, California enrollment
- 70 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 93535 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.
LANCASTER, CA 93535
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 Therese Fonseca's NPI number?
The NPI number for Therese Fonseca is 1902629348. It was assigned to this individual provider in the NPPES registry on November 4, 2024.
Where is Therese Fonseca located?
Therese Fonseca practices at 43322 Gingham Ave, Lancaster, CA 93535. The listed phone number is (661) 874-4050.
What is Therese Fonseca's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Therese Fonseca enrolled in Medicare?
Yes. Therese Fonseca is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Therese Fonseca's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Therese Fonseca reassigns Medicare benefits to Bartz-Altadonna Community Health Center (Lancaster, 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 Therese Fonseca'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 Therese Fonseca was last updated on November 4, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 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.
# Mrs. Therese Mariel Fonseca, FNP · NPI 1902629348
Family physician in Lancaster, California. Individual provider, active in the CMS NPPES registry since November 4, 2024.
## Identity
- **NPI:** 1902629348 (Entity type: Individual)
- **Enumerated:** November 4, 2024
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 95032530 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 43322 GINGHAM AVE, Lancaster, CA 93535-4576
- **Phone:** (661) 874-4050
## 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:** Bartz-Altadonna Community Health Center (NPI 1811279763, Lancaster, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 4, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1902629348) · Data from the CMS NPPES public registry.