JASON ADAM HOROWITZ MD
NPI 1801418926
Orthopaedic Surgery - Orthopaedic Surgery of the Spine in St. Louis, MO
About Jason Adam Horowitz Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JASON ADAM HOROWITZ MD (NPI 1801418926) is an individual orthopaedic surgery of the spine provider in St. Louis, Missouri, licensed in Missouri (2026042541) and active in the NPI registry since May 2020. He is enrolled in Medicare PECOS and is a graduate of Wayne State University School Of Medicine (2020).
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
Jason Adam Horowitz Md 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 Reassignment
Medicare enrollment records show Jason Horowitz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 61 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.
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 Jason Horowitz's NPI number?
The NPI number for Jason Horowitz is 1801418926. It was assigned to this individual provider in the NPPES registry on May 12, 2020.
Where is Jason Horowitz located?
Jason Horowitz practices at 660 S. Euclid Ave., Msc 8233-29-09, St. Louis, MO 63110. The listed phone number is (314) 514-3500.
What is Jason Horowitz's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Orthopaedic Surgery of the Spine, with taxonomy code 207XS0117X.
Is Jason Horowitz enrolled in Medicare?
Yes. Jason Horowitz 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 organization bills Medicare for Jason Horowitz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jason Horowitz reassigns Medicare benefits to Regents Of The University Of California (Orange, 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 Jason Horowitz'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 Jason Horowitz was last updated on September 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 50 days 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.
# Jason Adam Horowitz, MD · NPI 1801418926
Orthopaedic Surgery of the Spine physician in St. Louis, Missouri. Individual provider, active in the CMS NPPES registry since May 12, 2020.
## Identity
- **NPI:** 1801418926 (Entity type: Individual)
- **Enumerated:** May 12, 2020
- **Primary specialty:** Orthopaedic Surgery - Orthopaedic Surgery of the Spine · taxonomy 207XS0117X
- **State license:** 2026042541 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 660 S. EUCLID AVE., MSC 8233-29-09, St. Louis, MO 63110
- **Phone:** (314) 514-3500
## 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:** Regents Of The University Of California (NPI 1356399703, Orange, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Wayne State University School Of Medicine, class of 2020
## Record status
- **NPPES last updated:** September 14, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1801418926) · Data from the CMS NPPES public registry.