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

MS. Diane Jean Ernst, ARNP

Individual provider Nurse Practitioner · NPI 1285695999

MS. Diane Jean Ernst, ARNP is a Nurse Practitioner in Decorah, Iowa. Licensed in Iowa. Registered with an NPI since 2006.

Licensed in
IA
In the registry since
2006
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

901 Montgomery St
Decorah, IA 52101-2325
Phone: (563) 382-9671
Fax: (563) 382-4143
Show map & directions

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

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence C044854 (IA)

Record details

NPI number1285695999
Entity typeIndividual (Type 1)
GenderFemale
Credentials ARNP
Sole proprietorNo
NPI enumeratedMarch 31, 2006
Last updated in NPPESSeptember 23, 2008

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