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

MS. Jennifer Castle, ARNP

Individual provider Clinical Nurse Specialist · NPI 1871031302

MS. Jennifer Castle, ARNP is a Nurse Practitioner in Mason City, Iowa. Qualified in 2016, 10 years ago. Practices with North Iowa Mercy Clinics, a 300-clinician group and accepts Medicare assignment. Licensed in Iowa.

Years since qualifying
10
Licensed in
IA
In the registry since
2017
What do these letters mean?
ARNP — Advanced Registered Nurse Practitioner
The title some states use for an advanced practice nurse.

See every abbreviation used in this directory →

Practice location Address checks out

1000 4th St SW
Mason City, IA 50401-2800
Phone: (641) 428-6300
Fax: (641) 428-6347
Show map & directions

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

Specialties & licences

Clinical Nurse Specialist (primary) Taxonomy 364S00000X · Licence W107452 (IA)

Record details

NPI number1871031302
Entity typeIndividual (Type 1)
GenderFemale
Credentials ARNP
Sole proprietorNo
NPI enumeratedFebruary 3, 2017
Last updated in NPPESJuly 15, 2025
Certification dateJuly 15, 2025
Mailing address1000 4th St Sw, Mason City, IA 50401-2800

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2016 (10 years in practice)
Group practice North Iowa Mercy Clinics — 300 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount