NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John Frederick Lewison, MD

Internal Medicine Physician in South Lake Tahoe, CA · enumerated 2006.

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

National Provider Identifier

1497795678

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name John Frederick Lewison
Credential MD
Sex Male
Practice address 2170 South Ave, South Lake Tahoe, CA, 96150
Enumeration date Jun 7, 2006
Last updated in NPPES Mar 17, 2018

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License G146742 (CA) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License G146742 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for John Lewison?
The National Provider Identifier (NPI) for John Lewison is 1497795678, a Type 1 (individual) record in the CMS NPPES registry.
Where does John Lewison practice?
The practice location on file with NPPES is in South Lake Tahoe, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-03-17.