1. Home
  2. Directory
  3. California
  4. El Cajon
  5. Nurse Practitioner
  6. NPI Profile

NANCY DO NGUYEN DOWNEY NP
NPI 1578051017
Nurse Practitioner - Family in El Cajon, CA

Active since April 30, 2018PECOS EnrolledAccepts Medicare Assignment
875 EL CAJON BLVD, EL CAJON, CA 92020(626) 662-4100 Get Directions Write a Review

NPPES record last updated: August 7, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Aug 7, 2025, Aug 9, 2019, Jul 6, 2018 and 2 more (5 updates tracked since 2018).

About Nancy Do Nguyen Downey Np NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

NANCY DO NGUYEN DOWNEY NP (NPI 1578051017) is an individual family provider in El Cajon, California, licensed in California (95008318) and active in the NPI registry since April 2018. She is enrolled in Medicare PECOS and is a graduate of Other (2017).

NPPES Registry Identity

NPI1578051017
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameNANCY DO NGUYEN DOWNEYCredential: NP
Location Address875 EL CAJON BLVDEl Cajon, CA 92020-5714
Mailing Address875 El Cajon BlvdEl Cajon, CA 92020-5714 · (619) 662-4100
Phone(626) 662-4100
Sole ProprietorYes
Medical School CMSOtherGraduated 2017
Enumeration DateApril 30, 2018
Last NPPES UpdateAugust 7, 20255 updates tracked since enumeration
NPPES CertifiedAugust 7, 2025
✔ NPI 1578051017 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License✔ Licensed in CA · 95008318
875 EL CAJON BLVD, El Cajon, CA 92020
Open in Google Maps ↗

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

Nancy Do Nguyen Downey Np 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.

PECOS PAC ID5698024198
PECOS Enrollment IDI20180816001342
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Nancy Downey reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Centro De Salud De La Comunidad De San Ysidro, Inc.
Same address
Federally Qualified Health Center (FQHC)
875 EL CAJON BLVD
El Cajon, CA 92020
  • Reassigned Medicare billing, California enrollment
  • 577 clinicians in this Medicare group
NPI 1568845741 (619) 662-4100
Minuteclinic Diagnostic Medical Group Of San Diego Inc
1.9 mi
Family
2760 FLETCHER PKWY
El Cajon, CA 92020
  • Reassigned Medicare billing, California enrollment
  • 212 clinicians in this Medicare group
NPI 1568659233 (866) 389-2727

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 92020 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$94.87 typical visit price
range $62.10 – $184.71
Typical copayment $23.71 (range $15.52 – $46.17)
Most-billed visit code 99203
Established Patient
$108.42 typical visit price
range $20.62 – $151.42
Typical copayment $27.10 (range $5.15 – $37.85)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

ROXANA CRUZ
Occupational Therapist
875 EL CAJON BLVD
EL CAJON, CA 92020
San Diego County (619) 205-4585
SAMARYA NINUS ZAYA
Student in an Organized Health Care Education/Training Program
875 EL CAJON BLVD
EL CAJON, CA 92020
San Diego County (619) 662-4100
MS. NOOR JANKEEL
Student in an Organized Health Care Education/Training Program
875 EL CAJON BLVD
EL CAJON, CA 92020
San Diego County (619) 806-1054
DR. SUMANA REDDY MD
Allergy & Immunology
875 EL CAJON BLVD
EL CAJON, CA 92020
San Diego County (619) 662-4100
SAMIRA GEORGES YALDA BH CASE MANAGER
Case Manager/Care Coordinator
875 EL CAJON BLVD
EL CAJON, CA 92020
San Diego County (619) 662-4100
SHAHDA M ALTAEE
Community Health Worker
875 EL CAJON BLVD
EL CAJON, CA 92020
San Diego County (619) 662-4100
FAITH JALABE
Peer Specialist
875 EL CAJON BLVD
EL CAJON, CA 92020
San Diego County (619) 662-4100
KERSTEEN S SHAMOON CM
Case Manager/Care Coordinator
875 EL CAJON BLVD
EL CAJON, CA 92020
San Diego County (619) 662-4100

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 Nancy Downey's NPI number?

The NPI number for Nancy Downey is 1578051017. It was assigned to this individual provider in the NPPES registry on April 30, 2018.

Where is Nancy Downey located?

Nancy Downey practices at 875 El Cajon Blvd, El Cajon, CA 92020. The listed phone number is (626) 662-4100.

What is Nancy Downey's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Nancy Downey enrolled in Medicare?

Yes. Nancy Downey 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 Nancy Downey's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nancy Downey reassigns Medicare benefits to 2 organizations: Centro De Salud De La Comunidad De San Ysidro, Inc. (El Cajon, CA) and Minuteclinic Diagnostic Medical Group Of San Diego Inc (El Cajon, 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 Nancy Downey'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 Nancy Downey was last updated on August 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.