NPI Portal NPI Lookup & Verification

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

David P Larson, MD

Internal Medicine Physician in Beaverton, OR · enumerated 2005 · practices at David P Larson MD LLC.

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

National Provider Identifier

1992798599

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name David P Larson
Credential MD
Sex Male
Practice address Beaverton, OR, 97007
Phone (503) 715-3414
Fax (503) 352-4775
Enumeration date Aug 30, 2005
Last updated in NPPES Aug 5, 2021

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 34056 (AZ) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD29034 (OR) 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
500605904 Medicaid OR -

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.

Read the full guide → Validate an NPI →

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 David Larson?
David Larson is registered in NPPES with the primary taxonomy of Internal Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-08-05.