DR. LESLIE STUART GEWIN MD
NPI 1255488110
Internal Medicine - Nephrology in Saint Louis, MO

Q: What is the provider's specialty?

The provider's specialty is Internal Medicine with taxonomy code 207RN0300X and a focus in Nephrology.

Active since January 04, 2007

1 BARNES JEWISH HOSPITAL PLZ, DIV IM NEPHROLOGY, SAINT LOUIS, MO 63110(314) 362-7603(314) 747-5213 Get Directions Write a Review

NPPES record last updated: February 3, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Feb 3, 2026, Jul 9, 2024, Apr 25, 2024 and 2 more (5 updates tracked since 2022).

Table of Contents

NPI Profile Information
Primary Taxonomy
Secondary Taxonomies
Insurance Plans Accepted
Secondary Locations
Other Providers Same Location
Frequently Asked Questions

Individual
Female
Internal Medicine
Nephrology

About LESLIE GEWIN

This page provides the complete NPI Profile along with additional information for Leslie Gewin, an internist established in Saint Louis, Missouri with a medical specialization in Internal Medicine, focusing in nephrology . The healthcare provider is registered in the NPI registry with number 1255488110 assigned on January 2007. The practitioner's primary taxonomy code is 207RN0300X with license number 2021049335 (MO). The provider is registered as an individual and her NPI record was last updated February 2026.

NPI: 1255488110 Verify this NPI
Provider Name: DR. LESLIE STUART GEWIN MD
Gender: Female
Entity Type: Individual
Location Address: 1 BARNES JEWISH HOSPITAL PLZ DIV IM NEPHROLOGY SAINT LOUIS, MO 63110
Location Phone: (314) 362-7603
Location Fax: (314) 747-5213
Mailing Address: PO BOX 7412011 CHICAGO, IL 60674
Mailing Phone: (314) 362-7603
Mailing Fax: (314) 747-5213
Is Sole Proprietor?: No
Enumeration Date: 01-04-2007
Last Update Date: 02-03-2026
Code Navigator

An internist like Leslie Gewin is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.

Location Map

Secondary Locations

915 N Grand Blvd
Saint Louis, MO 63106
(314) 652-4100

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification: Internal Medicine Nephrology
Taxonomy Code: 207RN0300X
Type: Allopathic & Osteopathic Physicians
License No.: 2021049335
License State: MO
Taxonomy Description: An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No.	Taxonomy Code	Type	Classification / Specialization	License No. (State)
1	207R00000X	Allopathic & Osteopathic Physicians	Internal Medicine	2021049335 (MO)

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

Medicare

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Medicaid

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Additional Identifiers

The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.