DENISE GASTELUM CASTELLANOS
NPI 1356587042
Midwife in Fountain Valley, CA
About Denise Gastelum Castellanos NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DENISE GASTELUM CASTELLANOS (NPI 1356587042) is an individual midwife in Fountain Valley, California, licensed in California (1844) and active in the NPI registry since December 2008. She is enrolled in Medicare PECOS and is a graduate of Other (2005).
NPPES Registry Identity
Specialties & Licenses
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
Denise Gastelum Castellanos 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 Denise Castellanos reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fountain Valley, CA 92708
- Reassigned Medicare billing, California enrollment
- 948 clinicians in this Medicare group
Tustin, CA 92780
- Reassigned Medicare billing, California enrollment
- 2,052 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 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FOUNTAIN VALLEY, CA 92708
FOUNTAIN VALLEY, CA 92708
FOUNTAIN VALLEY, CA 92708
FOUNTAIN VALLEY, CA 92708
FOUNTAIN VALLEY, CA 92708
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 Denise Castellanos's NPI number?
The NPI number for Denise Castellanos is 1356587042. It was assigned to this individual provider in the NPPES registry on December 30, 2008.
Where is Denise Castellanos located?
Denise Castellanos practices at 18035 Brookhurst Street Suite 2100, Fountain Valley, CA 92708. The listed phone number is (657) 241-9090.
What is Denise Castellanos's specialty?
The primary specialty registered for this NPI is Midwife with taxonomy code 176B00000X.
Is Denise Castellanos enrolled in Medicare?
Yes. Denise 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 Denise Castellanos's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Denise Castellanos reassigns Medicare benefits to 2 organizations: Memorialcare Medical Foundation (Fountain Valley, CA) and Healthcare Partners Affiliates Medical Group (Tustin, 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 Denise 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 Denise Castellanos was last updated on October 19, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Denise Gastelum Castellanos · NPI 1356587042
Midwife provider in Fountain Valley, California. Individual provider, active in the CMS NPPES registry since December 30, 2008.
## Identity
- **NPI:** 1356587042 (Entity type: Individual)
- **Enumerated:** December 30, 2008
- **Primary specialty:** Midwife · taxonomy 176B00000X
- **State license:** 1844 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 18035 BROOKHURST STREET, SUITE 2100, Fountain Valley, CA 92708
- **Phone:** (657) 241-9090
## 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): Memorialcare Medical Foundation (NPI 1205167350, Fountain Valley, CA); Healthcare Partners Affiliates Medical Group (NPI 1891981502, Tustin, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2005
## Record status
- **NPPES last updated:** October 19, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1356587042) · Data from the CMS NPPES public registry.