Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Wei Michael Si, MD

Anatomic Pathology & Clinical Pathology Physician in Irving, TX · enumerated 2005 · practices at Quest Diagnostics Clinical Laboratories Inc.

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

National Provider Identifier

1467433532

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Registry record

Entity type Individual (Type 1)

Name Wei Michael Si

Credential MD

Sex Male

Practice address 4770 Regent Blvd, Irving, TX, 75063

Phone (972) 934-4300

Enumeration date Nov 7, 2005

Last updated in NPPES Jul 21, 2022

Taxonomy & licenses

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License M2103 (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
P00241772	Other	TX	RR MEDICARE
178022301	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.

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Frequently asked questions

How do I verify Wei Si's NPI record?

Cross-check NPI 1467433532 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1467433532 active?

Yes, as of the latest NPPES snapshot, NPI 1467433532 is active (record last updated 2022-07-21).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.