Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Alison H Massey, MS, RD, CDCES

Registered Dietitian in Prince Frederick, MD · enumerated 2010.

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

National Provider Identifier

1649502451

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Registry record

Entity type Individual (Type 1)

Name Ms. Alison H Massey

Credential MS, RD, CDCES

Sex Female

Practice address 985 Prince Frederick Blvd, Suite 201, Prince Frederick, MD, 20678

Phone (410) 535-2005

Fax (410) 535-4850

Enumeration date Feb 3, 2010

Last updated in NPPES Jul 3, 2023

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License DX3059 (MD) Primary

RD · Registered Dietitian: A nutrition professional credentialed by the Commission on Dietetic Registration. About the RD credential

Other identifiers

Identifier	Type	State	Issuer
DX3059	Other	MD	LICENSE DIETITIAN NUTRITION

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 1649502451 active?

Yes, as of the latest NPPES snapshot, NPI 1649502451 is active (record last updated 2023-07-03).

How do I verify Alison Massey's NPI record?

Cross-check NPI 1649502451 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 2023-07-03.