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

Grethe June Mortenson, CRNP

Individual provider Neonatal Nurse Practitioner · NPI 1205183415

Grethe June Mortenson, CRNP is a Nurse Practitioner in Klamath Falls, Oregon. Qualified in 2012, 14 years ago. Practices with Openloop Healthcare Partners PC, a 39-clinician group, works from 7 locations, accepts Medicare assignment and offers telehealth. Licensed in Arizona, Minnesota, Oregon and Pennsylvania and 1 more.

Years since qualifying
14
Licensed in
AZ, MN, OR, PA, WI
In the registry since
2012
Specialties on file
8
What do these letters mean?
CRNP — Certified Registered Nurse Practitioner
The title Pennsylvania and some other states use for a nurse practitioner.

See every abbreviation used in this directory →

Practice location Address checks out

2074 S 6th St
Klamath Falls, OR 97601
Phone: (541) 841-8110
Fax: (541) 885-5512
Show map & directions

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

Additional practice locations (6)

  • 2925 Chicago Ave, Minneapolis, MN 55407-1321 — (612) 262-9000
  • 351 Sw 9th St, Ontario, OR 97914-2639 — (541) 881-7184
  • 500 University Dr, Hershey, PA 17033-2360 — (800) 243-1455
  • 4800 Friendship Ave, Pittsburgh, PA 15224-1722 — (412) 578-5858
  • 405 Stageline Rd, Hudson, WI 54016-7848 — (715) 531-6000
  • 9555 76th St, Pleasant Prairie, WI 53158-1984 — (262) 577-8005

Specialties & licences

Neonatal Nurse Practitioner (primary) Taxonomy 363LN0000X · Licence SP029056 (PA)
Neonatal Nurse Practitioner Taxonomy 363LN0000X · Licence 1916 (MN)
Neonatal Nurse Practitioner Taxonomy 363LN0000X · Licence 10015210 (OR)
Neonatal Nurse Practitioner Taxonomy 363LN0000X · Licence 281915 (AZ)
Nurse Practitioner Taxonomy 363L00000X · Licence 8585 (WI)
Nurse Practitioner Taxonomy 363L00000X · Licence SP029043 (PA)
Nurse Practitioner Taxonomy 363L00000X · Licence 10015210 (OR)
Adult Health Nurse Practitioner Taxonomy 363LA2200X · Licence 1916 (MN)

Record details

NPI number1205183415
Entity typeIndividual (Type 1)
GenderFemale
Credentials CRNP
Sole proprietorNo
NPI enumeratedAugust 7, 2012
Last updated in NPPESAugust 8, 2025
Certification dateAugust 8, 2025

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2012 (14 years in practice)
Group practice Openloop Healthcare Partners Pc — 39 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare