Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Tony Nan-Rung Tsen, MD

Gastroenterology Physician in Seguin, TX · enumerated 2006.

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

National Provider Identifier

1205803442

Verified

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Registry record

Entity type Individual (Type 1)

Name Mr. Tony Nan-Rung Tsen

Credential MD

Sex Male

Practice address 911 S State Highway 123 Bypass, Seguin, TX, 78155

Phone (830) 372-9042

Fax (830) 372-2391

Enumeration date Mar 7, 2006

Last updated in NPPES Dec 23, 2011

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License J8152 (TX) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
131242306	Medicaid	TX	-

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

How do I verify Tony Tsen's NPI record?

Cross-check NPI 1205803442 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1205803442 active?

Yes, as of the latest NPPES snapshot, NPI 1205803442 is active (record last updated 2011-12-23).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-12-23.