ALIZA MACHEFSKY
NPI 1841646908
Obstetrics & Gynecology - Obstetrics in Saint Louis, MO
About Aliza Machefsky NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALIZA MACHEFSKY (NPI 1841646908) is an individual obstetrics provider in Saint Louis, Missouri, licensed in Georgia (86229) and active in the NPI registry since May 2016. She is enrolled in Medicare PECOS, is affiliated with Emory Decatur Hospital, and is a graduate of Drexel University College Of Medicine (2016).
NPPES Registry Identity
Specialties & Licenses 3
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
Aliza Machefsky 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 Aliza Machefsky reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Atlanta, GA 30303
- Reassigned Medicare billing, Georgia enrollment
- 2,681 clinicians in this Medicare group
Atlanta, GA 30322
- Reassigned Medicare billing, Georgia enrollment
- 4,840 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Emory Decatur Hospital
Acute Care Hospitals · Decatur, GAEmory University Hospital Midtown
Acute Care Hospitals · Atlanta, GAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63117 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.
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 63117
SAINT LOUIS, MO 63117
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 Aliza Machefsky's NPI number?
The NPI number for Aliza Machefsky is 1841646908. It was assigned to this individual provider in the NPPES registry on May 9, 2016.
Where is Aliza Machefsky located?
Aliza Machefsky practices at 6420 Clayton Rd St. Mary's Health Center, Saint Louis, MO 63117. The listed phone number is (314) 781-4772.
What is Aliza Machefsky's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Obstetrics, with taxonomy code 207VX0000X.
Is Aliza Machefsky enrolled in Medicare?
Yes. Aliza Machefsky 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 Aliza Machefsky's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aliza Machefsky reassigns Medicare benefits to 2 organizations: Emory Medical Care Foundation Inc (Atlanta, GA) and The Emory Clinic Inc (Atlanta, GA). 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 Aliza Machefsky's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Aliza Machefsky accept?
Health plans from Ambetter Health, Ambetter from Absolute Total Care, Ambetter of Alabama, Ambetter of North Carolina and Ambetter of Tennessee and 1 other insurer list Aliza Machefsky 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 Aliza Machefsky affiliated with any hospitals?
According to CMS data, Aliza Machefsky is affiliated with Emory Decatur Hospital and Emory University Hospital Midtown.
When was this NPI record last updated?
The NPPES record for Aliza Machefsky was last updated on May 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Aliza Machefsky · NPI 1841646908
Obstetrics physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since May 9, 2016.
## Identity
- **NPI:** 1841646908 (Entity type: Individual)
- **Enumerated:** May 9, 2016
- **Primary specialty:** Obstetrics & Gynecology - Obstetrics · taxonomy 207VX0000X
- **State license:** 86229 (Georgia)
- **Sole proprietor:** No
## Practice location
- **Address:** 6420 CLAYTON RD, ST. MARY'S HEALTH CENTER, Saint Louis, MO 63117-1811
- **Phone:** (314) 781-4772
## 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): Emory Medical Care Foundation Inc (NPI 1063452381, Atlanta, GA); The Emory Clinic Inc (NPI 1396798229, Atlanta, GA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Drexel University College Of Medicine, class of 2016
## Record status
- **NPPES last updated:** May 22, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1841646908) · Data from the CMS NPPES public registry.