TONY N TSEN MD
NPI 1043337074
Internal Medicine - Gastroenterology in Seguin, TX

Q: What is Southwest Gastoenterology PA's NPI number?

The NPI number for Southwest Gastoenterology PA is 1043337074. It was assigned to this organization in the NPPES registry on March 23, 2007. The provider is doing business as Tony N Tsen MD.

Q: What is Southwest Gastoenterology PA's specialty?

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

Active since March 23, 2007CLIA 45D0979144 · Waiver

911 S STATE HWY 123 BYPASS, SEGUIN, TX 78155(830) 372-9042(830) 372-2391 Get Directions Write a Review

NPPES record last updated: March 7, 2023. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Tony N Tsen Md NPPES

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

TONY N TSEN MD (NPI 1043337074) is a healthcare organization registered as a gastroenterology in Seguin, Texas and active in the NPI registry since March 2007. The organization holds a CLIA Waiver certificate valid through September 12, 2026 and lists Tony N Tsen, President, as its authorized official.

NPPES Registry Identity

NPI1043337074

Entity TypeOrganization

Primary Taxonomy207RG0100X

Legal Business NameSOUTHWEST GASTOENTEROLOGY PA

Location Address911 S STATE HWY 123 BYPASSSeguin, TX 78155-9754

Mailing AddressPo Box 2256Seguin, TX 78156-2256 · (830) 372-9042 · Fax (830) 382-2391

Phone(830) 372-9042

Fax(830) 372-2391

Organization SubpartNo

Authorized OfficialTony N TsenPresident · (830) 372-9042

Enumeration DateMarch 23, 2007

Last NPPES UpdateMarch 7, 2023

✔ NPI 1043337074 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in TX · J8152

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.

911 S STATE HWY 123 BYPASS, Seguin, TX 78155

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Other Names 1

Doing Business AsTony N Tsen Md

Other Identifiers 4

OtherF58934TX · Upin

Medicaid131242306TX

OtherJ8152TX · Texas Medical License #

OtherV0091792TX · Dps

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 45D0979144

Dr Tony Tsen Southwest Gastroenterology PA · Seguin, TX

Active · expires Sep 12, 2026

CLIA Number45D0979144

Laboratory TypePhysician Office

Certificate Effective DateSeptember 13, 2024

Certificate Expiration DateSeptember 12, 2026

Laboratory DirectorTony N. Tsen MD

Laboratory Phone(830) 372-9042

Laboratory LocationDr Tony Tsen Southwest Gastroenterology PA911 S State Hwy 123 Bypass, Seguin, TX 78155

CLIA data matches this NPI record on: Address Phone

This certificate is issued to a laboratory to perform only waived tests.

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 Southwest Gastoenterology PA's NPI number?

The NPI number for Southwest Gastoenterology PA is 1043337074. It was assigned to this organization in the NPPES registry on March 23, 2007. The provider is doing business as Tony N Tsen MD.

Where is Southwest Gastoenterology PA located?

Southwest Gastoenterology PA is located at 911 S State Hwy 123 Bypass, Seguin, TX 78155. The listed phone number is (830) 372-9042.

What is Southwest Gastoenterology PA's specialty?

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

Does Southwest Gastoenterology PA hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 45D0979144) is associated with this NPI, valid through September 12, 2026. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Southwest Gastoenterology PA was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.