NPI Portal NPI Lookup & Verification

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

Dr. William E Caras, M.D.

Critical Care Medicine (Internal Medicine) Physician in Longview, WA · enumerated 2007.

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

National Provider Identifier

1629115225

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Registry record

Entity type Individual (Type 1)
Name Dr. William E Caras
Credential M.D.
Sex Male
Practice address Longview, WA, 98632
Phone (360) 636-4847
Enumeration date Jan 31, 2007
Last updated in NPPES Mar 16, 2016

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

Taxonomy & licenses

171000000X Military Health Care Provider Other Service Providers · License MD00036572 (WA) Secondary
207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License MD000036572 (WA) Primary
207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License MD000036572 (WA) Secondary
207RS0012X Sleep Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License MD000036572 (WA) Secondary
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

Where does William Caras practice?
The practice location on file with NPPES is in Longview, WA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for William Caras?
The National Provider Identifier (NPI) for William Caras is 1629115225, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-03-16.