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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. MASON EDWARD GENTNER MD
NPI 1508450602
Emergency Medicine in Saint Louis, MO

Active since March 01, 2021PECOS Enrolled
1 BARNES JEWISH HOSPITAL PLZ, SAINT LOUIS, MO 63110(314) 747-3000 Get Directions Write a Review

NPPES record last updated: September 1, 2026. Verified against the NPPES registry weekly; last sync: September 20, 2026.

Record update history: Sep 1, 2026, Jun 24, 2024, Mar 10, 2023 and 3 more (6 updates tracked since 2021).

About Dr. Mason Edward Gentner Md NPPES

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

DR. MASON EDWARD GENTNER MD (NPI 1508450602) is an individual emergency medicine provider in Saint Louis, Missouri, licensed in Missouri (2026039078) and active in the NPI registry since March 2021. He is enrolled in Medicare PECOS, maintains a secondary practice location in Scott Afb, and is a graduate of Pennsylvania State University College Of Medicine (2021).

NPPES Registry Identity

NPI1508450602
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDR. MASON EDWARD GENTNERCredential: MD
Location Address1 BARNES JEWISH HOSPITAL PLZSaint Louis, MO 63110-1003
Mailing Address310 W Losey StScott Afb, IL 62225-5250 · (618) 256-9355
Phone(314) 747-3000
Sole ProprietorNo
Medical School CMSPennsylvania State University College Of MedicineGraduated 2021
Enumeration DateMarch 1, 2021
Last NPPES UpdateSeptember 1, 20266 updates tracked since enumeration
NPPES CertifiedSeptember 1, 2026
✔ NPI 1508450602 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in MO · 2026039078
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
Also ListedInternal Medicine · Critical Care MedicineTaxonomy 207RC0200X · License 2026039078 (MO)
1 BARNES JEWISH HOSPITAL PLZ, Saint Louis, MO 63110
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Secondary Practice Location 1

Location 1310 W Losey StScott AFB, IL 62225-5250 · Phone (618) 256-9355

Other Identifiers 1

Other01089088AIN · State Medical License

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mason Edward Gentner Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID1951710730
PECOS Enrollment IDI20250917002409
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 63110 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. MARGARET LEIGHTON MCNAIRY MD
Hospitalist
1 BARNES JEWISH HOSPITAL PLZ, DIV IM HOSPITALIST
SAINT LOUIS, MO 63110
St. Louis City (314) 362-1700
MS. CHERYL ANNE WOOLSEY PA
Physician Assistant
1 BARNES JEWISH HOSPITAL PLZ, DIV IM MEDICAL ONCOLOGY
SAINT LOUIS, MO 63110
St. Louis City (314) 747-1171
ANNA RABINOV ANNA RABINOV
Obstetrics & Gynecology
1 BARNES JEWISH HOSPITAL PLZ
SAINT LOUIS, MO 63110
St. Louis City (314) 747-3000
MRS. MICHELLE MARIE BLOOM ACNP
Nurse Practitioner (Acute Care)
1 BARNES JEWISH HOSPITAL PLZ, DEPT ANESTHESIOLOGY
SAINT LOUIS, MO 63110
St. Louis City (800) 862-9980
DR. FARIS ADAM BAKEER MD
Hospitalist
1 BARNES JEWISH HOSPITAL PLZ, DIV IM HOSPITALIST
SAINT LOUIS, MO 63110
St. Louis City (314) 362-1700
DR. REHAN RAIS MD
Hospitalist
1 BARNES JEWISH HOSPITAL PLZ, DIV IM HOSPITALIST
SAINT LOUIS, MO 63110
St. Louis City (314) 362-1700
DR. RANDY OLIVIER LAINE MD
Hospitalist
1 BARNES JEWISH HOSPITAL PLZ, DIV IM HOSPITALIST
SAINT LOUIS, MO 63110
St. Louis City (314) 362-1700
DR. BRADLEY SETH KUSHNER MD
Surgery
1 BARNES JEWISH HOSPITAL PLZ, DIV SURG VASCULAR
SAINT LOUIS, MO 63110
St. Louis City (314) 273-7373

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 Mason Gentner's NPI number?

The NPI number for Mason Gentner is 1508450602. It was assigned to this individual provider in the NPPES registry on March 1, 2021.

Where is Mason Gentner located?

Mason Gentner practices at 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110. The listed phone number is (314) 747-3000.

What is Mason Gentner's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Mason Gentner enrolled in Medicare?

Yes. Mason Gentner is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Mason Gentner was last updated on September 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 24 days 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.