DR. HECTOR CASTILLO M.D.
NPI 1659366136
Specialist in Los Angeles, CA
About Dr. Hector Castillo M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. HECTOR CASTILLO M.D. (NPI 1659366136) is an individual specialist in Los Angeles, California, licensed in California (A76158) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS and is a graduate of University Of Southern California Keck School Of Medicine (2000).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 5
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
Dr. Hector Castillo M.d. 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 Hector Castillo reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
South Gate, CA 90280
- Reassigned Medicare billing, California enrollment
- 279 clinicians in this Medicare group
Los Angeles, CA 90032
- Reassigned Medicare billing, California enrollment
- 6 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.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
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.
LOS ANGELES, CA 90021
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 Hector Castillo's NPI number?
The NPI number for Hector Castillo is 1659366136. It was assigned to this individual provider in the NPPES registry on September 12, 2005.
Where is Hector Castillo located?
Hector Castillo practices at 1005 E Washington Blvd, Los Angeles, CA 90021. The listed phone number is (213) 745-3636.
What is Hector Castillo's specialty?
The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.
Is Hector Castillo enrolled in Medicare?
Yes. Hector Castillo 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 Hector Castillo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Hector Castillo reassigns Medicare benefits to 2 organizations: Prohealth Partners A Medical Group (South Gate, CA) and Mosaic Family Care Medical Group, Inc. (Los Angeles, 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 Hector Castillo'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 Hector Castillo was last updated on October 25, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Dr. Hector Castillo, M.D. · NPI 1659366136
Specialist provider in Los Angeles, California. Individual provider, active in the CMS NPPES registry since September 12, 2005.
## Identity
- **NPI:** 1659366136 (Entity type: Individual)
- **Enumerated:** September 12, 2005
- **Primary specialty:** Specialist · taxonomy 174400000X
- **State license:** A76158 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1005 E WASHINGTON BLVD, Los Angeles, CA 90021-3020
- **Phone:** (213) 745-3636 · **Fax:** (213) 745-3626
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Prohealth Partners A Medical Group (NPI 1700457504, South Gate, CA); Mosaic Family Care Medical Group, Inc. (NPI 1891830568, Los Angeles, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Southern California Keck School Of Medicine, class of 2000
## Record status
- **NPPES last updated:** October 25, 2007
- **Other identifiers:** Other 770642090 (CA); Medicare PIN A76158 (CA); Other H73129 (CA); and 2 more
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Source: [NPI Profile](https://npiprofile.com/npi/1659366136) · Data from the CMS NPPES public registry.