Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marilyn Granneman, RN

Registered Nurse in Lynn, MA · enumerated 2006.

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

National Provider Identifier

1780798348

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Registry record

Entity type Individual (Type 1)

Name Marilyn Granneman

Credential RN

Sex Female

Practice address 269 Union St, Lynn, MA, 01901

Phone (781) 581-3900

Fax (781) 598-8133

Enumeration date Aug 19, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 102613 (MA) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN 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

What is the NPI number for Marilyn Granneman?

The National Provider Identifier (NPI) for Marilyn Granneman is 1780798348, a Type 1 (individual) record in the CMS NPPES registry.

Where does Marilyn Granneman practice?

The practice location on file with NPPES is in Lynn, MA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Melinda Jones Nurse Practitioner · Lynn, MA NPI 1033111711 Katherine Rosenfield Family Medicine Physician · Lynn, MA NPI 1073599221 Cynthia Moore Pediatric Nurse Practitioner · Lynn, MA NPI 1346209897 Gallaudet Howard Family Nurse Practitioner · Lynn, MA NPI 1730149113 Eileen Fisk Pediatrics Physician · Lynn, MA NPI 1588601199 Patrick Lee Internal Medicine Physician · Lynn, MA NPI 1740208164 Nicholas Mayper Family Medicine Physician · Lynn, MA NPI 1861505000 Angela Schrank Social Worker · Lynn, MA NPI 1396859864

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.