Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Gastroenterology Associates of the South Bay A Profess Medical Corp

Gastroenterology Physician in Torrance, CA · enumerated 2006 · authorized official Mark Takemura, M.D..

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1518975879

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Gastroenterology Associates of the South Bay A Profess Medical Corp

Practice address 20911 Earl Street, Suite 280, Torrance, CA, 90503

Phone (310) 214-7236

Fax (310) 542-0334

Enumeration date Aug 3, 2006

Last updated in NPPES Oct 19, 2010

Taxonomy & classification

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License G29961 (CA) Secondary

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License G58448 (CA) Primary

Authorized official

Name Mark Takemura

Title M.D.

Phone (310) 214-7236

Other identifiers

Identifier	Type	State	Issuer
100011914	Other	CA	RAILROAD
100008536	Other	CA	RAILROAD

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Who is the authorized official for Gastroenterology Associates of the South Bay A Profess Medical Corp?

NPPES lists Mark Takemura (M.D.) as the authorized official for this organization.

What is the NPI number for Gastroenterology Associates of the South Bay A Profess Medical Corp?

The NPI for Gastroenterology Associates of the South Bay A Profess Medical Corp is 1518975879, a Type 2 (organization) record in the CMS NPPES registry.

Providers at this address

Browse all →

Beach Cities Nephrology Nephrology Physician · Torrance, CA NPI 1225015944 South Bay Allergy & Asthma Assoc Allergy & Immunology Physician · Torrance, CA NPI 1528163334 Edward Buchsbaum Allergy & Immunology Physician · Torrance, CA NPI 1376648170 Mark Takemura Gastroenterology Physician · Torrance, CA NPI 1487721189 Steven Weinstock Gastroenterology Physician · Torrance, CA NPI 1477620177

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-10-19.