KEITH LEIBOWITZ M.D. A PROFESSIONAL CORPORATION
NPI 1033989652
Internal Medicine - Gastroenterology in Modesto, CA

Q: What is Keith Leibowitz M.D. A Professional Corporation's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Active since January 04, 2024

203 PARK AVE, MODESTO, CA 95354(757) 645-7079 Get Directions Write a Review

NPPES record last updated: January 4, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Keith Leibowitz M.d. A Professional Corporation NPPES

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

KEITH LEIBOWITZ M.D. A PROFESSIONAL CORPORATION (NPI 1033989652) is a healthcare organization registered as a gastroenterology in Modesto, California and active in the NPI registry since January 2024. The organization lists Keith A Leibowitz, Owner, as its authorized official.

NPPES Registry Identity

NPI1033989652

Entity TypeOrganization

Primary Taxonomy207RG0100X

Legal Business NameKEITH LEIBOWITZ M.D. A PROFESSIONAL CORPORATION

Location Address203 PARK AVEModesto, CA 95354-0557

Mailing Address203 Park AveModesto, CA 95354-0557 · (757) 645-7079

Phone(757) 645-7079

Organization SubpartNo

Authorized OfficialKeith A LeibowitzOwner · (757) 645-7079

Enumeration DateJanuary 4, 2024

NPPES CertifiedJanuary 4, 2024

✔ NPI 1033989652 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

203 PARK AVE, Modesto, CA 95354

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Other Names 1

Doing Business AsKeith Leibowitz M.d. A Professional Corporation

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE 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)

Keith Leibowitz M.d. A Professional Corporation 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 Keith Leibowitz M.D. A Professional Corporation, which bills Medicare for the services this clinician delivers.

Clinician (1)

Keith Leibowitz, MD

Gastroenterology

NPI 1083689335

700 17TH ST STE 102
Modesto, CA 95354

(209) 522-6100

✔ PECOS✔ Accepts Medicare0.6 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 Keith Leibowitz M.D. A Professional Corporation's NPI number?

The NPI number for Keith Leibowitz M.D. A Professional Corporation is 1033989652. It was assigned to this organization in the NPPES registry on January 4, 2024.

Where is Keith Leibowitz M.D. A Professional Corporation located?

Keith Leibowitz M.D. A Professional Corporation is located at 203 Park Ave, Modesto, CA 95354. The listed phone number is (757) 645-7079.

What is Keith Leibowitz M.D. A Professional Corporation's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Keith Leibowitz M.D. A Professional Corporation enrolled in Medicare?

Yes. Keith Leibowitz M.D. A Professional Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Keith Leibowitz M.D. A Professional Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Gastroenterology) reassigns their Medicare billing to Keith Leibowitz M.D. A Professional Corporation. 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 Keith Leibowitz M.D. A Professional Corporation was last updated on January 4, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.