ALIZA MACHEFSKY
NPI 1841646908
Obstetrics & Gynecology - Obstetrics in Saint Louis, MO

Active since May 09, 2016PECOS EnrolledAccepts Medicare Assignment
92.26/100
CMS Quality Rating
6420 CLAYTON RD, ST. MARY'S HEALTH CENTER, SAINT LOUIS, MO 63117(314) 781-4772 Get Directions Write a Review

NPPES record last updated: May 22, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: May 22, 2026, Jul 29, 2021, Jun 28, 2016 and 1 more (4 updates tracked since 2016).

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

NPI1841646908
Entity TypeIndividualFemale
Primary Taxonomy207VX0000X
Provider Legal NameALIZA MACHEFSKY
Location Address6420 CLAYTON RD, ST. MARY'S HEALTH CENTERSaint Louis, MO 63117-1811
Mailing Address6420 Clayton Rd, St. Mary's Health CenterSaint Louis, MO 63117-1811 · (314) 781-4772
Sole ProprietorNo
Medical School CMSDrexel University College Of MedicineGraduated 2016
Enumeration DateMay 9, 2016
Last NPPES UpdateMay 22, 20264 updates tracked since enumeration
NPPES CertifiedMay 22, 2026
NPI 1841646908 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

Primary SpecialtyObstetrics & Gynecology · ObstetricsAllopathic & Osteopathic Physicians
Taxonomy Code207VX0000X
License Licensed in GA · 86229
Definition
A physician who specializes in diagnosis, treatment, and management of patients with obstetric conditions. Source: National Uniform Claim Committee
Also ListedObstetrics & GynecologyTaxonomy 207V00000X · License 2016020843 (MO), 86229 (GA)
6420 CLAYTON RD, Saint Louis, MO 63117

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

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.

PECOS PAC ID6305134818
PECOS Enrollment IDI20210209001234
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

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, GA
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number110076
Location2701 N Decatur RoadDecatur, GA 30033 · De Kalb County
Emergency services Birthing friendly

Emory University Hospital Midtown

Acute Care Hospitals · Atlanta, GA
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number110078
Location550 Peachtree Street, NEAtlanta, GA 30308 · Fulton County
Emergency services Birthing friendly

Physician 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.

New Patient
$128.28 typical visit price
range $55.65 – $169.38
Typical copayment $32.07 (range $13.91 – $42.34)
Most-billed visit code 99204
Established Patient
$69.50 typical visit price
range $17.76 – $137.92
Typical copayment $17.37 (range $4.44 – $34.48)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

92.26/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality73.83
Promoting Interoperability100
Improvement Activities40

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.

Pharmacist
6420 CLAYTON RD
RICHMOND HEIGHTS, MO 63117
Registered Nurse
6420 CLAYTON RD
RICHMOND HEIGHTS, MO 63117
Dietitian, Registered
6420 CLAYTON RD
RICHMOND HEIGHTS, MO 63117
Pathology (Anatomic Pathology & Clinical Pathology)
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Dietitian, Registered
6420 CLAYTON RD
RICHMOND HEIGHTS, MO 63117
Occupational Therapist
6420 CLAYTON RD
RICHMOND HEIGHTS, MO 63117
Student in an Organized Health Care Education/Training Program
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Nurse Anesthetist, Certified Registered
6420 CLAYTON RD
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.

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 2 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.