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

Holly Sienkiewicz, RN

Individual provider School Registered Nurse · NPI 1578108304

Holly Sienkiewicz, RN is a School Registered Nurse in Livingston, Montana. Licensed in Montana. Registered with an NPI since 2019.

Licensed in
MT
In the registry since
2019
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

102 View Vista Dr
Livingston, MT 59047-3528
Phone: (406) 222-0448
Show map & directions

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

Specialties & licences

School Registered Nurse (primary) Taxonomy 163WS0200X · Licence 73401 (MT)

Record details

NPI number1578108304
Entity typeIndividual (Type 1)
GenderFemale
Credentials RN
Sole proprietorNo
NPI enumeratedNovember 15, 2019
Last updated in NPPESNovember 15, 2019