Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Tammy Zaruba, CPNP

Pediatric Nurse Practitioner in Leominster, MA · enumerated 2009.

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

National Provider Identifier

1639310691

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Registry record

Entity type Individual (Type 1)

Name Ms. Tammy Zaruba

Credential CPNP

Sex Female

Practice address 100 Hospital Rd Ste 4, Medical Associates Pediatrics, Leominster, MA, 01453

Phone (978) 514-6300

Fax (978) 514-6324

Enumeration date Mar 20, 2009

Last updated in NPPES Oct 3, 2024

Taxonomy & licenses

363LP0200X Pediatric Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN274124 (MA) Primary

Other identifiers

Identifier	Type	State	Issuer
MZ0751950J	Other	MA	STAE CONTROLLED SUBSTANCE
RN274124	Other	MA	STATE LICENSE

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 1639310691 active?

Yes, as of the latest NPPES snapshot, NPI 1639310691 is active (record last updated 2024-10-03).

How do I verify Tammy Zaruba's NPI record?

Cross-check NPI 1639310691 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Amanda Diffin Physician Assistant · Leominster, MA NPI 1710547385 Colbee Daigneault Physician Assistant · Leominster, MA NPI 1841840006

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-10-03.