ALIYA L. FREDERICK MD, PHD
NPI 1548657992
Psychiatry & Neurology - Neurology with Special Qualifications in Child Neurology in San Diego, CA
About Aliya L. Frederick Md, Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALIYA L. FREDERICK MD, PHD (NPI 1548657992) is an individual neurology with special qualifications in child neurology provider in San Diego, California, licensed in California (A148160) and active in the NPI registry since April 2015. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Aliya L. Frederick Md, Phd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Aliya Frederick reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Diego, CA 92123
- Reassigned Medicare billing, California enrollment
- 562 clinicians in this Medicare group
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 135 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92123 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
SAN DIEGO, CA 92123
SAN DIEGO, CA 92123
SAN DIEGO, CA 92123
SAN DIEGO, CA 92123
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 Aliya Frederick's NPI number?
The NPI number for Aliya Frederick is 1548657992. It was assigned to this individual provider in the NPPES registry on April 23, 2015.
Where is Aliya Frederick located?
Aliya Frederick practices at 8001 Frost St, San Diego, CA 92123. The listed phone number is (858) 966-5819.
What is Aliya Frederick's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology with Special Qualifications in Child Neurology, with taxonomy code 2084N0402X.
Is Aliya Frederick enrolled in Medicare?
Yes. Aliya Frederick is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Aliya Frederick's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aliya Frederick reassigns Medicare benefits to 2 organizations: Rady Children's Hospital San Diego (San Diego, CA) and Regents Of The University Of California (San Diego, 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 Aliya Frederick'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 Aliya Frederick was last updated on April 7, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Aliya L. Frederick, MD, PHD · NPI 1548657992
Neurology with Special Qualifications in Child Neurology physician in San Diego, California. Individual provider, active in the CMS NPPES registry since April 23, 2015.
## Identity
- **NPI:** 1548657992 (Entity type: Individual)
- **Enumerated:** April 23, 2015
- **Primary specialty:** Psychiatry & Neurology - Neurology with Special Qualifications in Child Neurology · taxonomy 2084N0402X
- **State license:** A148160 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 8001 FROST ST, San Diego, CA 92123-2746
- **Phone:** (858) 966-5819
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **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): Rady Children's Hospital San Diego (NPI 1669617197, San Diego, CA); Regents Of The University Of California (NPI 1649372673, San Diego, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 7, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1548657992) · Data from the CMS NPPES public registry.