Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John Leso, DO

Q: What is the NPI number for John Leso?

The National Provider Identifier (NPI) for John Leso is 1972063006, a Type 1 (individual) record in the CMS NPPES registry.

Student in an Organized Health Care Education/Training Program in Brighton, MA · enumerated 2019.

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

National Provider Identifier

1972063006

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Registry record

Entity type Individual (Type 1)

Name John Leso

Credential DO

Sex Male

Practice address 736 Cambridge St, 2nd Fl, Bldg C 7th Fl, Brighton, MA, 02135

Phone (617) 789-2344

Fax (617) 789-2975

Enumeration date Mar 24, 2019

Last updated in NPPES May 15, 2026

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care · License 64189 (NY) Primary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 1027986 (MA) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 1027986 (MA) Secondary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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 Leso?

The National Provider Identifier (NPI) for John Leso is 1972063006, a Type 1 (individual) record in the CMS NPPES registry.

Where does John Leso practice?

The practice location on file with NPPES is in Brighton, MA. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-05-15.