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KAREN CASTELLANO FNP-BC
NPI 1821695552
Nurse Practitioner - Family in West Covina, CA

Active since October 06, 2020PECOS Enrolled
1115 S SUNSET AVE, WEST COVINA, CA 91790(626) 962-4011 Get Directions Write a Review

NPPES record last updated: March 1, 2023. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Mar 1, 2023, Oct 6, 2020 (2 updates tracked since 2020).

About Karen Castellano Fnp-bc NPPES

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

KAREN CASTELLANO FNP-BC (NPI 1821695552) is an individual family provider in West Covina, California, licensed in California (95012925) and active in the NPI registry since October 2020. She is enrolled in Medicare PECOS and is a graduate of Other (2019).

NPPES Registry Identity

NPI1821695552
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameKAREN CASTELLANOCredential: FNP-BC
Location Address1115 S SUNSET AVEWest Covina, CA 91790-3940
Mailing AddressPo Box 1416Walnut, CA 91788-1416 · (909) 519-6391
Phone(626) 962-4011
Sole ProprietorYes
Medical School CMSOtherGraduated 2019
Enumeration DateOctober 6, 2020
Last NPPES UpdateMarch 1, 20232 updates tracked since enumeration
NPPES CertifiedMarch 1, 2023
✔ NPI 1821695552 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 · 95012925
1115 S SUNSET AVE, West Covina, CA 91790
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 (PECOS)

Karen Castellano Fnp-bc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID749740249
PECOS Enrollment IDI20260903003146
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 Reassignment

Medicare enrollment records show Karen Castellano reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Exer Medical Corporation
44 mi
Urgent Care
26777 AGOURA RD STE B4
Calabasas, CA 91302
  • Reassigned Medicare billing, California enrollment
  • 256 clinicians in this Medicare group
NPI 1588901532 (818) 880-2225

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 91790 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
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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.

MRS. CLAIRE MARIE TABARES FNP-C
Nurse Practitioner
1115 S SUNSET AVE
WEST COVINA, CA 91790
Los Angeles County (626) 814-2547
MRS. SHANNON RIVERA PA-C
Physician Assistant
1115 S SUNSET AVE
WEST COVINA, CA 91790
Los Angeles County (626) 962-4011
CATHARINE IRENE JORDAN REGISTERED NURSE
Registered Nurse (Emergency)
1115 S SUNSET AVE
WEST COVINA, CA 91790
Los Angeles County (626) 814-2534
IVY KRISTINA ENVERGA PHARMD
Pharmacist
1115 S SUNSET AVE
WEST COVINA, CA 91790
Los Angeles County (626) 814-2412
MICHELLE INGA
Registered Nurse (Emergency)
1115 S SUNSET AVE
WEST COVINA, CA 91790
Los Angeles County (626) 962-4011
LAUREN CAROL O'NEAL PA-C
Physician Assistant
1115 S SUNSET AVE
WEST COVINA, CA 91790
Los Angeles County (626) 962-4011
TREVOR-TRUNG NGUYEN
Student in an Organized Health Care Education/Training Program
1115 S SUNSET AVE
WEST COVINA, CA 91790
Los Angeles County (626) 962-4011
DR. DAVID J MICHELSON M.D.
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
1115 S SUNSET AVE
WEST COVINA, CA 91790
Los Angeles County (626) 962-4011

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 Karen Castellano's NPI number?

The NPI number for Karen Castellano is 1821695552. It was assigned to this individual provider in the NPPES registry on October 6, 2020.

Where is Karen Castellano located?

Karen Castellano practices at 1115 S Sunset Ave, West Covina, CA 91790. The listed phone number is (626) 962-4011.

What is Karen Castellano's specialty?

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

Is Karen Castellano enrolled in Medicare?

Yes. Karen Castellano is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Karen Castellano's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Karen Castellano reassigns Medicare benefits to Exer Medical Corporation (Calabasas, 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 Karen Castellano'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 Karen Castellano was last updated on March 1, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.