Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Elizabeth D Madden, NP

Nurse Practitioner in Sterling, MA · enumerated 2006 · practices at Hamilton Orthodontics, Pllc.

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

National Provider Identifier

1083689764

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Registry record

Entity type Individual (Type 1)

Name Ms. Elizabeth D Madden

Credential NP

Sex Female

Practice address 225 Leominster Rd, Sterling, MA, 01564

Phone (978) 422-6900

Fax (978) 422-7561

Enumeration date Feb 17, 2006

Last updated in NPPES Jun 15, 2022

Taxonomy & licenses

363LP0200X Pediatric Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN162100 (MA) Secondary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN162100 (MA) 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

Other identifiers

Identifier	Type	State	Issuer
110015266A	Medicaid	MA	-

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 specialty is Elizabeth Madden?

Elizabeth Madden is registered in NPPES with the primary taxonomy of Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Anne Josephs Pediatrics Physician · Sterling, MA NPI 1932192796 Richard Marseglia Pediatrics Physician · Sterling, MA NPI 1952384075 Kathleen Cleary Pediatrics Physician · Sterling, MA NPI 1780668962 Heather Finlay-Morreale Pediatrics Physician · Sterling, MA NPI 1699096487 Mariana Azer Pediatrics Physician · Sterling, MA NPI 1710263058 Carla French Hamilton Orthodontics and Dentofacial Orthopedics Dentistry · Sterling, MA NPI 1568719698 Scott Wagner Pediatrics Physician · Sterling, MA NPI 1356801237 Hamilton Orthodontics, Pllc Orthodontics and Dentofacial Orthopedics Dentistry · Sterling, MA NPI 1356015325

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-06-15.