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

Kjersten Johnsen, APN

Individual provider Psychiatric/Mental Health Clinical Nurse Specialist · NPI 1407172588

Kjersten Johnsen, APN is a Psychiatric/Mental Health Clinical Nurse Specialist in Watertown, Massachusetts. Practices as a sole proprietor. Licensed in Massachusetts.

Licensed in
MA
In the registry since
2010
What do these letters mean?
APN — Advanced Practice Nurse
The umbrella title some states use for nurse practitioners and other advanced practice nurses.

See every abbreviation used in this directory →

Practice location Address checks out

290 Pleasant St 102
Watertown, MA 02472-2427
Phone: (617) 571-9221
Show map & directions

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

Specialties & licences

Psychiatric/Mental Health Clinical Nurse Specialist (primary) Taxonomy 364SP0808X · Licence RN17902 (MA)

Record details

NPI number1407172588
Entity typeIndividual (Type 1)
GenderFemale
Credentials APN
Sole proprietorYes
NPI enumeratedApril 14, 2010
Last updated in NPPESApril 14, 2010