NATALIE MARIE STASH MD
NPI 1235691981
Orthopaedic Surgery in Saint Louis, MO
About Natalie Marie Stash Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NATALIE MARIE STASH MD (NPI 1235691981) is an individual orthopaedic surgery provider in Saint Louis, Missouri, licensed in Missouri (2025033832) and active in the NPI registry since April 2019. She is enrolled in Medicare PECOS, is affiliated with Mercy Hospital St Louis, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Locations 2
Accepted Insurance
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
Natalie Marie Stash 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 Natalie Stash reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Washington, MO 63090
- Reassigned Medicare billing, Missouri enrollment
- 168 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Hospital St Louis
Acute Care Hospitals · Saint Louis, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63141 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 19
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAINT LOUIS, MO 63141
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 Natalie Stash's NPI number?
The NPI number for Natalie Stash is 1235691981. It was assigned to this individual provider in the NPPES registry on April 2, 2019. The provider is also known as Natalie Marie Gaio MD.
Where is Natalie Stash located?
Natalie Stash practices at 701 S New Ballas Rd Ste 510, Saint Louis, MO 63141. The listed phone number is (314) 251-6710.
What is Natalie Stash's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.
Is Natalie Stash enrolled in Medicare?
Yes. Natalie Stash 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 Natalie Stash's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Natalie Stash reassigns Medicare benefits to Mercy Clinic Surgical Specialists, LLC (Washington, MO). 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 Natalie Stash's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Natalie Stash accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 3 other insurers list Natalie Stash as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Natalie Stash affiliated with any hospitals?
According to CMS data, Natalie Stash is affiliated with Mercy Hospital St Louis.
When was this NPI record last updated?
The NPPES record for Natalie Stash was last updated on August 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Natalie Marie Stash, MD · NPI 1235691981
Orthopaedic Surgery physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since April 2, 2019.
## Identity
- **NPI:** 1235691981 (Entity type: Individual)
- **Enumerated:** April 2, 2019
- **Primary specialty:** Orthopaedic Surgery · taxonomy 207X00000X
- **State license:** 2025033832 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 701 S NEW BALLAS RD STE 510, Saint Louis, MO 63141-8726
- **Phone:** (314) 251-6710
## 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:** Mercy Clinic Surgical Specialists, LLC (NPI 1043530538, Washington, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Saint Louis University School Of Medicine, class of 2019
## Record status
- **NPPES last updated:** August 18, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1235691981) · Data from the CMS NPPES public registry.