Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary Twombley, NP

Acute Care Nurse Practitioner in West Roxbury, MA · enumerated 2006.

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

National Provider Identifier

1104875376

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Registry record

Entity type Individual (Type 1)

Name Mary Twombley

Credential NP

Sex Female

Practice address 1400 Vfw Pkwy, West Roxbury, MA, 02132

Phone (202) 957-7797

Enumeration date May 8, 2006

Last updated in NPPES Feb 6, 2023

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN61064 (DC) Secondary

363LA2100X Acute Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN2307306 (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

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

How do I verify Mary Twombley's NPI record?

Cross-check NPI 1104875376 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1104875376 active?

Yes, as of the latest NPPES snapshot, NPI 1104875376 is active (record last updated 2023-02-06).

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Shahe Fereshetian Plastic Surgery Physician · West Roxbury, MA NPI 1447244173 Yesha Barker Emergency Medicine Physician · West Roxbury, MA NPI 1013903384 Michael Charness Neurology Physician · West Roxbury, MA NPI 1457341083 Christopher O Donnell Cardiovascular Disease Physician · Boston, MA NPI 1063402246 Paul Conlin Endocrinology, Diabetes & Metabolism Physician · West Roxbury, MA NPI 1023008257 Emily Wan Pulmonary Disease Physician · West Roxbury, MA NPI 1265423701 Albert Kim Clinical Cardiac Electrophysiology Physician · Boston, MA NPI 1184615361 John Sapirstein Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · West Roxbury, MA NPI 1235110982

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-02-06.