AUSTIN SINN MD
NPI 1508550559
Emergency Medicine in Saint Louis, MO
About Austin Sinn Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
AUSTIN SINN MD (NPI 1508550559) is an individual emergency medicine provider in Saint Louis, Missouri, licensed in Missouri (2026016513) and active in the NPI registry since June 2023. He is enrolled in Medicare PECOS and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Austin Sinn Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Austin Sinn reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63128
- Reassigned Medicare billing, Missouri enrollment
- 186 clinicians in this Medicare group
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 241 clinicians in this Medicare group
Festus, MO 63028
- Reassigned Medicare billing, Missouri enrollment
- 118 clinicians in this Medicare group
Washington, MO 63090
- Reassigned Medicare billing, Missouri enrollment
- 178 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 63128 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.
SAINT LOUIS, MO 63128
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 Austin Sinn's NPI number?
The NPI number for Austin Sinn is 1508550559. It was assigned to this individual provider in the NPPES registry on June 5, 2023.
Where is Austin Sinn located?
Austin Sinn practices at 10010 Kennerly Rd, Saint Louis, MO 63128. The listed phone number is (314) 525-1900.
What is Austin Sinn's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Austin Sinn enrolled in Medicare?
Yes. Austin Sinn is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Austin Sinn's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Austin Sinn reassigns Medicare benefits to 4 organizations: Mercy Hospital South (Saint Louis, MO), Mercy Hospitals East Communities (Saint Louis, MO), Mercy Hospital Jefferson (Festus, MO) and Mercy Hospitals East Communities (Washington, MO). 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 Austin Sinn'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 Austin Sinn was last updated on July 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.
# Austin Sinn, MD · NPI 1508550559
Emergency Medicine physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since June 5, 2023.
## Identity
- **NPI:** 1508550559 (Entity type: Individual)
- **Enumerated:** June 5, 2023
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 2026016513 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 10010 KENNERLY RD, Saint Louis, MO 63128-2106
- **Phone:** (314) 525-1900
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Mercy Hospital South (NPI 1568481984, Saint Louis, MO); Mercy Hospitals East Communities (NPI 1427098169, Saint Louis, MO); Mercy Hospital Jefferson (NPI 1508859661, Festus, MO); Mercy Hospitals East Communities (NPI 1104912997, Washington, MO) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 27, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1508550559) · Data from the CMS NPPES public registry.