Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Andrew Ahearn, NP

Registered Nurse in Leominster, MA · enumerated 2019 · practices at Quest Diagnostics Massachusetts LLC.

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

National Provider Identifier

1598309932

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Andrew Ahearn

Credential NP

Sex Male

Practice address 225 New Lancaster Rd, Leominster, MA, 01453

Phone (978) 534-6500

Enumeration date Oct 29, 2019

Last updated in NPPES Mar 14, 2021

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License RN2319623 (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
NA	Other	-	NA

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 specialty is Andrew Ahearn?

Andrew Ahearn is registered in NPPES with the primary taxonomy of Registered Nurse. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-14.