Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Leonard Nai-En Chen, M.D.

Q: What is the NPI number for Leonard Chen?

The National Provider Identifier (NPI) for Leonard Chen is 1548688336, a Type 1 (individual) record in the CMS NPPES registry.

Blood Banking & Transfusion Medicine Physician in Bethesda, MD · enumerated 2014 · practices at National Institute of Health.

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

National Provider Identifier

1548688336

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Registry record

Entity type Individual (Type 1)

Name Dr. Leonard Nai-En Chen

Credential M.D.

Sex Male

Practice address 9000 Rockville Pike Bldg 10, Bethesda, MD, 20892

Phone (301) 451-8186

Enumeration date Mar 31, 2014

Last updated in NPPES Jul 22, 2024

Taxonomy & licenses

207ZB0001X Blood Banking & Transfusion Medicine Physician Allopathic & Osteopathic Physicians · License D0084728 (MD) Primary

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License D84728 (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

What is the NPI number for Leonard Chen?

The National Provider Identifier (NPI) for Leonard Chen is 1548688336, a Type 1 (individual) record in the CMS NPPES registry.

Where does Leonard Chen practice?

The practice location on file with NPPES is in Bethesda, MD. 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 2024-07-22.