Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jason S. Willis, MD

Anatomic Pathology & Clinical Pathology Physician in Irving, TX · enumerated 2007 · practices at Quest Diagnostics Clinical Laboratories Inc.

Data current as of Jul 11, 2026 · sourced from CMS NPPES

National Provider Identifier

1487857983

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Registry record

Entity type Individual (Type 1)

Name Jason S. Willis

Credential MD

Sex Male

Practice address 4770 Regent Blvd, Irving, TX, 75063

Phone (972) 934-4300

Enumeration date Jun 11, 2007

Last updated in NPPES Jan 14, 2019

Taxonomy & licenses

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License N9146 (TX) Primary

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Jason Willis?

Jason Willis is registered in NPPES with the primary taxonomy of Anatomic Pathology & Clinical Pathology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2019-01-14.