Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Diane G Hearn, NP

Q: What is the NPI number for Diane Hearn?

The National Provider Identifier (NPI) for Diane Hearn is 1023370921, a Type 1 (individual) record in the CMS NPPES registry.

Nurse Practitioner in Bethesda, MD · enumerated 2012 · practices at American Oncology Partners, P.A..

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

National Provider Identifier

1023370921

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Registry record

Entity type Individual (Type 1)

Name Mrs. Diane G Hearn

Credential NP

Sex Female

Practice address 6410 Rockledge Dr Ste 660, Bethesda, MD, 20817

Phone (301) 571-0019

Enumeration date Jun 15, 2012

Last updated in NPPES Jan 3, 2023

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License SP012115 (PA) Secondary

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License R135462 (MD) Secondary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License R135462 (MD) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP 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 Diane Hearn practice?

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

What is the NPI number for Diane Hearn?

The National Provider Identifier (NPI) for Diane Hearn is 1023370921, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-01-03.