Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Najeeb Crossley, M.D.

Radiation Oncology Physician in Harrisburg, PA · enumerated 2015.

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

National Provider Identifier

1871988261

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Registry record

Entity type Individual (Type 1)

Name Dr. Najeeb Crossley

Credential M.D.

Sex Male

Practice address Harrisburg, PA, 17109

Phone (717) 724-6740

Fax (717) 724-6741

Enumeration date Apr 2, 2015

Last updated in NPPES May 8, 2024

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License MD483282 (PA) Primary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License D89794 (MD) Secondary

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 Najeeb Crossley practice?

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

What is the NPI number for Najeeb Crossley?

The National Provider Identifier (NPI) for Najeeb Crossley is 1871988261, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-05-08.