MACKENZIE ANNE SMITH STECK MD
NPI 1619436441
Internal Medicine - Critical Care Medicine in Saint Louis, MO

Active since March 19, 2019PECOS Enrolled
88.92/100
CMS Quality Rating
1225 S GRAND BLVD, SAINT LOUIS, MO 63104(314) 977-4680 Get Directions Write a Review

NPPES record last updated: April 28, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Apr 28, 2026, Oct 5, 2022, Apr 8, 2022 and 1 more (4 updates tracked since 2019).

About Mackenzie Anne Smith Steck Md NPPES

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

MACKENZIE ANNE SMITH STECK MD (NPI 1619436441) is an individual critical care medicine provider in Saint Louis, Missouri, licensed in Missouri (2022033891) and active in the NPI registry since March 2019. She is enrolled in Medicare PECOS and maintains a secondary practice location in Saint Louis.

NPPES Registry Identity

NPI1619436441
Entity TypeIndividualFemale
Primary Taxonomy207RC0200X
Provider Legal NameMACKENZIE ANNE SMITH STECKCredential: MD
Location Address1225 S GRAND BLVDSaint Louis, MO 63104-1016
Mailing Address1402 S Grand BlvdSaint Louis, MO 63104-1004 · (314) 577-8762 · Fax (314) 268-5108
Sole ProprietorNo
Enumeration DateMarch 19, 2019
Last NPPES UpdateApril 28, 20264 updates tracked since enumeration
NPPES CertifiedApril 28, 2026
NPI 1619436441 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

Primary SpecialtyInternal Medicine · Critical Care MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207RC0200X
License Licensed in MO · 2022033891
Definition

An internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.

Also ListedInternal MedicineTaxonomy 207R00000X · License 2022033891 (MO)
Also ListedInternal Medicine · Pulmonary DiseaseTaxonomy 207RP1001X · License 2022033891 (MO)
1225 S GRAND BLVD, Saint Louis, MO 63104

Secondary Practice Location 1

Location 13660 Vista AveSaint Louis, MO 63110-2540 · Phone (314) 977-6100 · Fax (314) 977-6164

Accepted Insurance

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

Enrolled in Medicare (PECOS)

Mackenzie Anne Smith Steck 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63104 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
$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.

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.

88.92/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality84.72
Promoting Interoperability100
Improvement Activities40
Cost45.01

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.

Psychiatry & Neurology (Vascular Neurology)
1225 S GRAND BLVD
SAINT LOUIS, MO 63104
Nurse Practitioner (Adult Health)
1225 S GRAND BLVD
SAINT LOUIS, MO 63104
Psychiatry & Neurology (Neurology)
1225 S GRAND BLVD
SAINT LOUIS, MO 63104
Optometrist (Low Vision Rehabilitation)
1225 S GRAND BLVD
SAINT LOUIS, MO 63104
Ophthalmology
1225 S GRAND BLVD
SAINT LOUIS, MO 63104
Ophthalmology
1225 S GRAND BLVD
SAINT LOUIS, MO 63104
Ophthalmology
1225 S GRAND BLVD
SAINT LOUIS, MO 63104
Ophthalmology
1225 S GRAND BLVD
SAINT LOUIS, MO 63104

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 Mackenzie Steck's NPI number?

The NPI number for Mackenzie Steck is 1619436441. It was assigned to this individual provider in the NPPES registry on March 19, 2019.

Where is Mackenzie Steck located?

Mackenzie Steck practices at 1225 S Grand Blvd, Saint Louis, MO 63104. The listed phone number is (314) 977-4680.

What is Mackenzie Steck's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.

Is Mackenzie Steck enrolled in Medicare?

Yes. Mackenzie Steck is registered in the Medicare PECOS enrollment system.

What insurance does Mackenzie Steck accept?

Health plans from Anthem Blue Cross and Blue Shield and Oscar Insurance Company list Mackenzie Steck 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 Mackenzie Steck was last updated on April 28, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.