Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dorothy J Sassi, NP

Nurse Practitioner in Springfield, MA · enumerated 2006.

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

National Provider Identifier

1356389043

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Registry record

Entity type Individual (Type 1)

Name Dorothy J Sassi

Credential NP

Sex Female

Practice address 299 Carew St, Suite 419, Springfield, MA, 01104

Phone (413) 737-7951

Enumeration date Jun 3, 2006

Last updated in NPPES Mar 3, 2010

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 206906 (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
377121	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

Is NPI 1356389043 active?

Yes, as of the latest NPPES snapshot, NPI 1356389043 is active (record last updated 2010-03-03).

How do I verify Dorothy Sassi's NPI record?

Cross-check NPI 1356389043 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Pamela Henderson Ophthalmology Physician · Springfield, MA NPI 1134122666 James Haines Internal Medicine Physician · Springfield, MA NPI 1497754170 William Belcastro Internal Medicine Physician · Springfield, MA NPI 1548269251 Dr. James Haines & Dr. William Belcastro, Ptr. Internal Medicine Physician · Springfield, MA NPI 1124027834 Luz Martin Psychiatry Physician · Springfield, MA NPI 1396739231 Savvas Papazoglou Specialist · Springfield, MA NPI 1043205438 Leonard Wagner Orthopaedic Surgery Physician · Springfield, MA NPI 1568457778 Steven Holsten Orthopaedic Surgery Physician · Springfield, MA NPI 1124013339

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-03-03.