Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Sixian Cheng Welch, D.O.

Internal Medicine Physician in Marble Falls, TX · enumerated 2008.

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

National Provider Identifier

1811157928

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Registry record

Entity type Individual (Type 1)

Name Dr. Sixian Cheng Welch

Credential D.O.

Sex Female

Practice address Marble Falls, TX, 78654

Phone (830) 201-7100

Enumeration date Jun 11, 2008

Last updated in NPPES Dec 2, 2024

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License BP10031984 (TX) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License P0516 (TX) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

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.

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Frequently asked questions

How do I verify Sixian Welch's NPI record?

Cross-check NPI 1811157928 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1811157928 active?

Yes, as of the latest NPPES snapshot, NPI 1811157928 is active (record last updated 2024-12-02).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-02.