Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John M. O'Loughlin, M.D.

Allergy Physician in Leominster, MA · enumerated 2006.

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

National Provider Identifier

1477648582

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Registry record

Entity type Individual (Type 1)

Name John M. O'Loughlin

Credential M.D.

Sex Male

Practice address 80 Erdman Way, Suite 315., Leominster, MA, 01453

Phone (978) 537-4805

Fax (978) 537-2185

Enumeration date Oct 4, 2006

Last updated in NPPES Jun 13, 2014

Taxonomy & licenses

207KA0200X Allergy Physician Allopathic & Osteopathic Physicians · License 28368 (MA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
6167373	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

What is the NPI number for John O'Loughlin?

The National Provider Identifier (NPI) for John O'Loughlin is 1477648582, a Type 1 (individual) record in the CMS NPPES registry.

Where does John O'Loughlin practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-06-13.