Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Iris Sullivan MD PC

Family Nurse Practitioner in Fitchburg, MA · enumerated 2011 · authorized official Iris Sullivan, Physician.

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

National Provider Identifier

1306137518

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Registry record

Entity type Organization (Type 2)

Legal business name Iris Sullivan MD PC

Practice address 46 Whalon Street, Fitchburg, MA, 01420

Phone (978) 342-4500

Fax (978) 342-4600

Enumeration date Apr 21, 2011

Last updated in NPPES Apr 21, 2011

Taxonomy & classification

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN281239 (MA) Primary

Authorized official

Name Iris Sullivan

Title Physician

Phone (978) 342-4500

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

Where is Iris Sullivan MD PC located?

The practice location on file with NPPES is in Fitchburg, MA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2011-04-21. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-04-21.