Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

B Jack Longley, MD

Q: What is the NPI number for B Longley?

The National Provider Identifier (NPI) for B Longley is 1609835669, a Type 1 (individual) record in the CMS NPPES registry.

Dermatopathology Physician in Madison, WI · enumerated 2006.

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

National Provider Identifier

1609835669

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Registry record

Entity type Individual (Type 1)

Name B Jack Longley

Credential MD

Sex Male

Practice address 8 N Prospect Ave, Madison, WI, 53726

Phone (000) 000-0000

Enumeration date Mar 20, 2006

Last updated in NPPES Jan 15, 2021

Taxonomy & licenses

207ND0900X Dermatopathology Physician Allopathic & Osteopathic Physicians · License 43952 (WI) 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

Where does B Longley practice?

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

What is the NPI number for B Longley?

The National Provider Identifier (NPI) for B Longley is 1609835669, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-01-15.