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Barry Steven Allswang, MD

Internal Medicine Physician in Los Alamitos, CA · enumerated 2006.

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

National Provider Identifier

1720016397

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Registry record

Entity type Individual (Type 1)
Name Barry Steven Allswang
Credential MD
Sex Male
Practice address 3801 Katella Ave, Suite 330, Los Alamitos, CA, 90720
Phone (562) 594-9546
Enumeration date Jun 30, 2006
Last updated in NPPES Sep 7, 2007

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License G34791 (CA) 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 NPI 1720016397 active?
Yes, as of the latest NPPES snapshot, NPI 1720016397 is active (record last updated 2007-09-07).
How do I verify Barry Allswang's NPI record?
Cross-check NPI 1720016397 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 2007-09-07.