THOMAS S.LAM MD. A PROFESSIONAL CORPORATION
NPI 1336309350
Internal Medicine - Gastroenterology in Alhambra, CA

Active since June 12, 2008
333 S GARFIELD AVE STE A, ALHAMBRA, CA 91801(626) 284-1997 Get Directions Write a Review

NPPES record last updated: June 17, 2025. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Jun 17, 2025, Aug 24, 2021 (2 updates tracked since 2021).

  • Organization
  • Internal Medicine
  • Gastroenterology

About THOMAS S.LAM MD. A PROFESSIONAL CORPORATION

This page provides the complete NPI Profile along with additional information for Thomas S.lam Md. A Professional Corporation, an internist established in Alhambra, California operating as a Internal Medicine, focusing in gastroenterology . The healthcare provider is registered in the NPI registry with number 1336309350 assigned on June 2008. The practitioner's primary taxonomy code is 207RG0100X with license number A44280 (CA). The provider is registered as an organization and their NPI record was last updated one year ago. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization. The authorized official of this NPI record is Dr. Thomas S. Lam M.d. (Director)

NPI
1336309350 Verify this NPI
Provider Name
THOMAS S.LAM MD. A PROFESSIONAL CORPORATION
Entity Type
Organization
Location Address
333 S GARFIELD AVE STE A ALHAMBRA, CA 91801
Location Phone
(626) 284-1997
Mailing Address
PO BOX 7589 ALHAMBRA, CA 91802
Mailing Phone
(626) 284-1997
Mailing Fax
(626) 284-2549
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
06-12-2008
Last Update Date
06-17-2025
Code Navigator

An internist like Thomas S.lam Md. A Professional Corporation 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

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 Gastroenterology

Taxonomy Code
207RG0100X
Type
Allopathic & Osteopathic Physicians
License No.
A44280
License State
CA
Taxonomy Description
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.

Group Taxonomy 193400000X SINGLE SPECIALTY GROUP

This provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.

Authorized Official

The authorized official is the designated individual with the legal authority to make changes to the provider’s official NPI record. For organizations, the authorized official must be a general partner, chairman of the board, CEO, CFO or a direct owner holding at least a 5 percent stake in the medical organization.

Authorized Official Name

DR. THOMAS S. LAM M.D.

Authorized Official Title
DIRECTOR
Authorized Official Phone
(626) 943-6274

Reviews for THOMAS S.LAM MD. A PROFESSIONAL CORPORATION

There are currently no reviews for this provider. Be the first person to share your experience with this provider by filling out our review form. Your insights are appreciated and will help others make informed decisions.

Other Providers at the Same Location


The following 4 providers are registered at the same or a nearby location.

Internal Medicine (Gastroenterology)
333 S GARFIELD AVE STE A
ALHAMBRA, CA 91801
Nurse Practitioner (Family)
333 S GARFIELD AVE STE A
ALHAMBRA, CA 91801
Internal Medicine (Gastroenterology)
333 S GARFIELD AVE STE A
ALHAMBRA, CA 91801
Internal Medicine (Gastroenterology)
333 S GARFIELD AVE STE A
ALHAMBRA, CA 91801

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1336309350, enumerated as an "organization" on June 12, 2008.

The provider is located at 333 S GARFIELD AVE STE A ALHAMBRA, CA 91801 and the phone number is (626) 284-1997.

Internal Medicine with taxonomy code 207RG0100X and a focus in Gastroenterology.