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DR. MAGGIE STEFFEN MCCORMICK MD
NPI 1952317547
Pediatrics in Saint Louis, MO

Active since August 01, 2006PECOS Enrolled
8888 LADUE RD, STE 100, SAINT LOUIS, MO 63124(314) 862-4050(314) 862-1141 Get Directions Write a Review

NPPES record last updated: April 17, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Apr 25, 2024, Apr 10, 2024, Nov 15, 2021 and 1 more (4 updates tracked since 2021).

About Dr. Maggie Steffen Mccormick Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MAGGIE STEFFEN MCCORMICK MD (NPI 1952317547) is an individual pediatrics provider in Saint Louis, Missouri, licensed in Missouri (2009010348) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1952317547
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameDR. MAGGIE STEFFEN MCCORMICKCredential: MD
Location Address8888 LADUE RD, STE 100Saint Louis, MO 63124-2326
Mailing AddressPo Box 7412125Chicago, IL 60674-2125 · (314) 862-4050 · Fax (314) 862-1141
Phone(314) 862-4050
Fax(314) 862-1141
Sole ProprietorNo
Enumeration DateAugust 1, 2006
Last NPPES UpdateApril 17, 20254 updates tracked since enumeration
✔ NPI 1952317547 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in MO · 2009010348
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
8888 LADUE RD, Saint Louis, MO 63124
Open in Google Maps ↗

Other Identifiers 1

Medicaid209413301MO

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Cox HealthPlans, UnitedHealthcare.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Maggie Steffen Mccormick Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignment

Medicare enrollment records show Maggie Mccormick reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Washington University
Same address
Multi-Specialty
8888 LADUE RD STE 100
Saint Louis, MO 63124
  • Reassigned Medicare billing, Missouri enrollment
  • 12 clinicians in this Medicare group
NPI 1346847233 (314) 862-4050

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 63124 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
$86.32 typical visit price
range $55.65 – $169.38
Typical copayment $21.58 (range $13.91 – $42.34)
Most-billed visit code 99203
Established Patient
$98.37 typical visit price
range $17.76 – $137.92
Typical copayment $24.59 (range $4.44 – $34.48)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

DR. KIMBERLY S SIRL PH.D.
Psychologist (Clinical)
8888 LADUE RD, #120
SAINT LOUIS, MO 63124
St. Louis County (314) 454-6069
WOLKEN DENTAL D D S P C
Durable Medical Equipment & Medical Supplies (Customized Equipment)
8888 LADUE RD
SAINT LOUIS, MO 63124
St. Louis County (314) 727-6676
WOLKEN DENTAL
Dentist (General Practice)
8888 LADUE RD, STE 200
ST. LOUIS, MO 63124
St. Louis County (314) 727-6676
DR. ELIZABETH L ATKINSON MD
Pediatrics
8888 LADUE RD, STE 100
SAINT LOUIS, MO 63124
St. Louis County (314) 862-4050
DR. CHRISTOPHER M WOLKEN DDS
Dentist
8888 LADUE RD, STE 200
SAINT LOUIS, MO 63124
St. Louis County (314) 727-6676
DR. ARCHNA GOEL CALFEE MD
Pediatrics
8888 LADUE RD, STE 100
SAINT LOUIS, MO 63124
St. Louis County (314) 862-4050
DR. JENNIFER ANNE HORST MD
Pediatrics
8888 LADUE RD, STE 100
SAINT LOUIS, MO 63124
St. Louis County (314) 862-4050
DR. SUSAN C SYLVIA PH.D.
Psychologist (Clinical)
8888 LADUE RD, #120
SAINT LOUIS, MO 63124
St. Louis County (314) 454-6069

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 Maggie Mccormick's NPI number?

The NPI number for Maggie Mccormick is 1952317547. It was assigned to this individual provider in the NPPES registry on August 1, 2006.

Where is Maggie Mccormick located?

Maggie Mccormick practices at 8888 Ladue Rd Ste 100, Saint Louis, MO 63124. The listed phone number is (314) 862-4050.

What is Maggie Mccormick's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Maggie Mccormick enrolled in Medicare?

Yes. Maggie Mccormick is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Maggie Mccormick's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Maggie Mccormick reassigns Medicare benefits to Washington University (Saint Louis, 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 Maggie Mccormick's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Maggie Mccormick accept?

Health plans from Cox HealthPlans and UnitedHealthcare list Maggie Mccormick 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.

When was this NPI record last updated?

The NPPES record for Maggie Mccormick was last updated on April 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.