NPI Portal NPI Lookup & Verification

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

David Wallis, MD

Internal Medicine Physician in Redondo Beach, CA · enumerated 2006 · practices at David Wallis Medical Corporation.

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

National Provider Identifier

1255383139

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Registry record

Entity type Individual (Type 1)
Name David Wallis
Credential MD
Sex Male
Practice address Redondo Beach, CA, 90277
Phone (424) 437-4700
Fax (424) 437-8884
Enumeration date May 17, 2006
Last updated in NPPES Oct 9, 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 A77627 (CA) 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
00A776270 Other CA BLUE SHIELD

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 NPI 1255383139 active?
Yes, as of the latest NPPES snapshot, NPI 1255383139 is active (record last updated 2024-10-09).
How do I verify David Wallis's NPI record?
Cross-check NPI 1255383139 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-10-09.