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

Mark Raymond O'Connell, RN

Individual provider Registered Nurse · NPI 1255701777

Mark Raymond O'Connell, RN is a Registered Nurse in Ontario, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2015
What do these letters mean?
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.

See every abbreviation used in this directory →

Practice location Address checks out

6839 Knickerbocker Rd
Ontario, NY 14519-9741
Phone: (585) 739-0123
Show map & directions

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

Specialties & licences

Registered Nurse (primary) Taxonomy 163W00000X · Licence 543742 (NY)

Record details

NPI number1255701777
Entity typeIndividual (Type 1)
GenderMale
Credentials RN
Sole proprietorYes
NPI enumeratedSeptember 26, 2015
Last updated in NPPESSeptember 26, 2015
Mailing address6839 Knickerbocker Rd, Ontario, NY 14519-9741

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