Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Peter Edward Johnsen, MD

Pediatric Adolescent Medicine Physician in Princeton, NJ · enumerated 2007.

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

National Provider Identifier

1336361450

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Registry record

Entity type Individual (Type 1)

Name Dr. Peter Edward Johnsen

Credential MD

Sex Male

Practice address Princeton University Health Services, Princeton, NJ, 08544

Phone (609) 258-3141

Fax (609) 258-1355

Enumeration date May 2, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

2080A0000X Pediatric Adolescent Medicine Physician Allopathic & Osteopathic Physicians · License 25MA03500400 (NJ) 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 Peter Johnsen?

The National Provider Identifier (NPI) for Peter Johnsen is 1336361450, a Type 1 (individual) record in the CMS NPPES registry.

Where does Peter Johnsen practice?

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

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