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
Mailing address290 Pleasant St, 102, Watertown, MA 02472-2427