PREMIER HEART GROUP
NPI 1518062017
Internal Medicine - Cardiovascular Disease in Chesterfield, MO

Q: What is St. John's Cardiovascular Associates L.L.C.'s specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Active since September 13, 2006

121 SAINT LUKES CENTER DR, SUITE 501, CHESTERFIELD, MO 63017(314) 485-3500(314) 485-3520 Get Directions Write a Review

NPPES record last updated: February 1, 2010. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Premier Heart Group NPPES

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

PREMIER HEART GROUP (NPI 1518062017) is a healthcare organization registered as a cardiovascular disease in Chesterfield, Missouri and active in the NPI registry since September 2006. The organization lists Leslie E. Mezei, Managing Member, as its authorized official.

NPPES Registry Identity

NPI1518062017

Entity TypeOrganization

Primary Taxonomy207RC0000X

Legal Business NameST. JOHN'S CARDIOVASCULAR ASSOCIATES L.L.C.

Location Address121 SAINT LUKES CENTER DR, SUITE 501Chesterfield, MO 63017-3509

Mailing Address121 Saint Lukes Center Dr, Suite 501Chesterfield, MO 63017-3509 · (314) 485-3500 · Fax (314) 485-3520

Phone(314) 485-3500

Fax(314) 485-3520

Organization SubpartNo

Authorized OfficialLeslie E. MezeiManaging Member · (314) 485-3500

Enumeration DateSeptember 13, 2006

Last NPPES UpdateFebruary 1, 2010

✔ NPI 1518062017 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

Definition

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

Also ListedInternal Medicine · Interventional CardiologyTaxonomy 207RI0011X

121 SAINT LUKES CENTER DR, Chesterfield, MO 63017

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Other Names 1

Doing Business AsPremier Heart Group

Other Identifiers 1

Medicare PIN000013725MO

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Premier Heart Group is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Premier Heart Group, which bills Medicare for the services this clinician delivers.

Clinician (1)

Leslie Mezei, M.D.

Cardiovascular Disease (Cardiology)

NPI 1992800429

139 N CENTRAL AVE APT D
Saint Louis, MO 63105

(314) 486-1396

✔ PECOS✔ Accepts Medicare9.3 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 St. John's Cardiovascular Associates L.L.C.'s NPI number?

The NPI number for St. John's Cardiovascular Associates L.L.C. is 1518062017. It was assigned to this organization in the NPPES registry on September 13, 2006. The provider is doing business as Premier Heart Group.

Where is St. John's Cardiovascular Associates L.L.C. located?

St. John's Cardiovascular Associates L.L.C. is located at 121 Saint Lukes Center Dr Suite 501, Chesterfield, MO 63017. The listed phone number is (314) 485-3500.

What is St. John's Cardiovascular Associates L.L.C.'s specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is St. John's Cardiovascular Associates L.L.C. enrolled in Medicare?

Yes. St. John's Cardiovascular Associates L.L.C. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through St. John's Cardiovascular Associates L.L.C.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Cardiovascular Disease (Cardiology)) reassigns their Medicare billing to St. John's Cardiovascular Associates L.L.C.. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for St. John's Cardiovascular Associates L.L.C. was last updated on February 1, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 years 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.