DR. AARON STERN M. D.
NPI 1871771618
Emergency Medicine in Sacramento, CA
About Dr. Aaron Stern M. D. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. AARON STERN M. D. (NPI 1871771618) is an individual emergency medicine provider in Sacramento, California, licensed in California (A102315) and active in the NPI registry since February 2008. He is enrolled in Medicare PECOS.
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 (PECOS)
Dr. Aaron Stern M. D. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Aaron Stern reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Sonoma, CA 95476
- Reassigned Medicare billing, California enrollment
- 112 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 95819 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.
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 Aaron Stern's NPI number?
The NPI number for Aaron Stern is 1871771618. It was assigned to this individual provider in the NPPES registry on February 4, 2008.
Where is Aaron Stern located?
Aaron Stern practices at 4001 J St, Sacramento, CA 95819. The listed phone number is (916) 453-4037.
What is Aaron Stern's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Aaron Stern enrolled in Medicare?
Yes. Aaron Stern is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Aaron Stern's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aaron Stern reassigns Medicare benefits to Sonoma Valley Emergency Physicians Medical Group, Inc (Sonoma, CA). The 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 Aaron Stern'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 Aaron Stern was last updated on February 4, 2008. 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.