NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Allison Jean Leonard, MD

Hospitalist Physician in San Diego, CA · enumerated 2020.

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

National Provider Identifier

1235756107

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Allison Jean Leonard
Credential MD
Sex Female
Practice address 4077 Fifth Ave, San Diego, CA, 92103
Phone (619) 260-7125
Enumeration date Jun 26, 2020
Last updated in NPPES Dec 11, 2023

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A188570 (CA) Secondary
208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License A188570 (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

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 Allison Leonard?
Allison Leonard is registered in NPPES with the primary taxonomy of Hospitalist 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 2023-12-11.