Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

John M. O'Loughlin, MD

Individual provider Allergy Physician · NPI 1477648582

John M. O'Loughlin, MD is an Allergy Physician in Leominster, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2006.

Licensed in
MA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

80 Erdman Way Ste 315
Leominster, MA 01453
Phone: (978) 537-4805
Fax: (978) 537-2185
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Allergy Physician (primary) Taxonomy 207KA0200X · Licence 28368 (MA)

Record details

NPI number1477648582
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 4, 2006
Last updated in NPPESJune 13, 2014

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