Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Frederick Leech, DDS

Q: What is the NPI number for John Leech?

The National Provider Identifier (NPI) for John Leech is 1487662714, a Type 1 (individual) record in the CMS NPPES registry.

General Practice Dentistry in Mansfield, OH · enumerated 2006.

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

National Provider Identifier

1487662714

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Registry record

Entity type Individual (Type 1)

Name Dr. John Frederick Leech

Credential DDS

Sex Male

Practice address 630 Lexington Ave, Mansfield, OH, 44907

Phone (419) 756-1110

Fax (419) 756-1865

Enumeration date Aug 3, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 30 012604 (OH) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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 Leech?

The National Provider Identifier (NPI) for John Leech is 1487662714, a Type 1 (individual) record in the CMS NPPES registry.

Where does John Leech practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.