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

Mr. Brian John O'Neill, APRN, MSN, CCRN-CSC

Individual provider Adult Health Nurse Practitioner · NPI 1821011396

Mr. Brian John O'Neill, APRN, MSN, CCRN-CSC is an Adult Health Nurse Practitioner in New Haven, Connecticut. Practices as a sole proprietor. Licensed in Connecticut.

Licensed in
CT
In the registry since
2006
What do these letters mean?
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.
MSN — Master of Science in Nursing
A graduate nursing degree, usually held alongside an advanced practice licence.

See every abbreviation used in this directory →

Practice location Address checks out

20 York St
New Haven, CT 06510-3220
Phone: (203) 412-6904
Fax: (203) 688-1663
Show map & directions

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

Specialties & licences

Adult Health Nurse Practitioner (primary) Taxonomy 363LA2200X · Licence 002360 (CT)

Record details

NPI number1821011396
Entity typeIndividual (Type 1)
GenderMale
Credentials APRN , MSN , CCRN-CSC
Sole proprietorYes
NPI enumeratedJuly 25, 2006
Last updated in NPPESJuly 9, 2007

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