Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Mary Frances Hasty Hartley, MS, RDN

Registered Dietitian in Reston, VA · enumerated 2019.

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

National Provider Identifier

1659835049

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Registry record

Entity type Individual (Type 1)

Name Mrs. Mary Frances Hasty Hartley

Credential MS, RDN

Sex Female

Practice address 11800 Sunrise Valley Dr Ste 700, Reston, VA, 20191

Phone (703) 834-1473

Enumeration date Jan 30, 2019

Last updated in NPPES Jan 30, 2019

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 86069089 (NC) Primary

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

Is NPI 1659835049 active?

Yes, as of the latest NPPES snapshot, NPI 1659835049 is active (record last updated 2019-01-30).

How do I verify Mary Hartley's NPI record?

Cross-check NPI 1659835049 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-01-30.