AILEEN CELESTE CASTELLANOS AMFT
NPI 1275188401
Marriage & Family Therapist in Ontario, CA
About Aileen Celeste Castellanos Amft NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
AILEEN CELESTE CASTELLANOS AMFT (NPI 1275188401) is an individual marriage & family therapist in Ontario, California, licensed in California (127239) and active in the NPI registry since August 2019. She is enrolled in Medicare PECOS, maintains a secondary practice location in Tustin, and is a graduate of Other (2021).
NPPES Registry Identity
Specialties & Licenses
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
Aileen Celeste Castellanos Amft 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 Reassignments
2Medicare enrollment records show Aileen Castellanos reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Ontario, CA 91764
- Reassigned Medicare billing, California enrollment
- 2,584 clinicians in this Medicare group
San Dimas, CA 91773
- Reassigned Medicare billing, California enrollment
- 15 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.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ONTARIO, CA 91764
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 Aileen Castellanos's NPI number?
The NPI number for Aileen Castellanos is 1275188401. It was assigned to this individual provider in the NPPES registry on August 5, 2019.
Where is Aileen Castellanos located?
Aileen Castellanos practices at 3491 Concours Ste 202, Ontario, CA 91764. The listed phone number is (909) 284-4504.
What is Aileen Castellanos's specialty?
The primary specialty registered for this NPI is Marriage & Family Therapist with taxonomy code 106H00000X.
Is Aileen Castellanos enrolled in Medicare?
Yes. Aileen Castellanos 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 Aileen Castellanos's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aileen Castellanos reassigns Medicare benefits to 2 organizations: Faculty Physicians And Surgeons Of Llusm (Ontario, CA) and Tumambing Hughes Marriage And Family Therapy Incorporated (San Dimas, 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 Aileen Castellanos'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 Aileen Castellanos was last updated on April 21, 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.
# Aileen Celeste Castellanos, AMFT · NPI 1275188401
Marriage & Family Therapist provider in Ontario, California. Individual provider, active in the CMS NPPES registry since August 5, 2019.
## Identity
- **NPI:** 1275188401 (Entity type: Individual)
- **Enumerated:** August 5, 2019
- **Primary specialty:** Marriage & Family Therapist · taxonomy 106H00000X
- **State license:** 127239 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3491 CONCOURS STE 202, Ontario, CA 91764-5927
- **Phone:** (909) 284-4504
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Faculty Physicians And Surgeons Of Llusm (NPI 1962633479, Ontario, CA); Tumambing Hughes Marriage And Family Therapy Incorporated (NPI 1598541435, San Dimas, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2021
## Record status
- **NPPES last updated:** April 21, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1275188401) · Data from the CMS NPPES public registry.