DR. GREGORY SCOTT AAEN M.D.
NPI 1780898304
Psychiatry & Neurology - Neurology with Special Qualifications in Child Neurology in Loma Linda, CA
About Dr. Gregory Scott Aaen M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GREGORY SCOTT AAEN M.D. (NPI 1780898304) is an individual neurology with special qualifications in child neurology provider in Loma Linda, California, licensed in California (A90485) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS and is a graduate of Loma Linda University School Of Medicine (2003).
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
Dr. Gregory Scott Aaen 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 Gregory Aaen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Loma Linda, CA 92354
- Reassigned Medicare billing, California enrollment
- 2,584 clinicians in this Medicare group
San Bernardino, CA 92408
- Reassigned Medicare billing, California enrollment
- 455 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 92354 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
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 Gregory Aaen's NPI number?
The NPI number for Gregory Aaen is 1780898304. It was assigned to this individual provider in the NPPES registry on May 10, 2007.
Where is Gregory Aaen located?
Gregory Aaen practices at Llumc, House Staff Office Cp 21005, 11234 Anderson St., Loma Linda, CA 92354. The listed phone number is (909) 558-4000.
What is Gregory Aaen'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 Gregory Aaen enrolled in Medicare?
Yes. Gregory Aaen 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 Gregory Aaen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Aaen reassigns Medicare benefits to 2 organizations: Faculty Physicians And Surgeons Of Llusm (Loma Linda, CA) and Sac Health System (San Bernardino, 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 Gregory Aaen'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 Gregory Aaen was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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. Gregory Scott Aaen, M.D. · NPI 1780898304
Neurology with Special Qualifications in Child Neurology physician in Loma Linda, California. Individual provider, active in the CMS NPPES registry since May 10, 2007.
## Identity
- **NPI:** 1780898304 (Entity type: Individual)
- **Enumerated:** May 10, 2007
- **Primary specialty:** Psychiatry & Neurology - Neurology with Special Qualifications in Child Neurology · taxonomy 2084N0402X
- **State license:** A90485 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** LLUMC, HOUSE STAFF OFFICE CP 21005, 11234 ANDERSON ST., Loma Linda, CA 92354
- **Phone:** (909) 558-4000
## 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): Faculty Physicians And Surgeons Of Llusm (NPI 1245605781, Loma Linda, CA); Sac Health System (NPI 1013935915, San Bernardino, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Loma Linda University School Of Medicine, class of 2003
## Record status
- **NPPES last updated:** July 8, 2007
---
Source: [NPI Profile](https://npiprofile.com/npi/1780898304) · Data from the CMS NPPES public registry.