GRETHE JUNE MORTENSON CRNP
NPI 1205183415
Nurse Practitioner - Neonatal in Klamath Falls, OR
About Grethe June Mortenson Crnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GRETHE JUNE MORTENSON CRNP (NPI 1205183415) is an individual neonatal provider in Klamath Falls, Oregon, licensed in Pennsylvania (SP029056) and active in the NPI registry since August 2012. She is enrolled in Medicare PECOS, maintains 6 additional practice locations, and is a graduate of Other (2012).
NPPES Registry Identity
Specialties & Licenses 3
Other Names 1
Secondary Practice Locations 6
Other Identifiers 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Grethe June Mortenson Crnp is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
11Medicare enrollment records show Grethe Mortenson reassigns Medicare billing to 11 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Ontario, OR 97914
- Reassigned Medicare billing, Oregon enrollment
- 49 clinicians in this Medicare group
Cokato, MN 55321
- Reassigned Medicare billing, Minnesota enrollment
- 2,609 clinicians in this Medicare group
Des Moines, IA 50309
- Reassigned Medicare billing, Maine and Minnesota enrollments
- 32 clinicians in this Medicare group
Shreveport, LA 71103
- Reassigned Medicare billing, Louisiana enrollment
- 1,167 clinicians in this Medicare group
Kenosha, WI 53143
- Reassigned Medicare billing, Wisconsin enrollment
- 212 clinicians in this Medicare group
Urbana, IL 61801
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Carle Health Care Incorporated
- 2,516 clinicians in this Medicare group
West Monroe, LA 71292
- Reassigned Medicare billing, Louisiana enrollment
- 4,559 clinicians in this Medicare group
Burlington, NC 27215
- Reassigned Medicare billing, North Carolina enrollment
- 1,337 clinicians in this Medicare group
Bamberg, SC 29003
- Reassigned Medicare billing, South Carolina enrollment
- 2,389 clinicians in this Medicare group
Mechanicsburg, PA 17050
- Reassigned Medicare billing, Pennsylvania enrollment
- 2,216 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 97601 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
KLAMATH FALLS, OR 97601
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Grethe Mortenson's NPI number?
The NPI number for Grethe Mortenson is 1205183415. It was assigned to this individual provider in the NPPES registry on August 7, 2012. The provider is also known as Grethe June M Jennings Cnp.
Where is Grethe Mortenson located?
Grethe Mortenson practices at 2074 S 6th St, Klamath Falls, OR 97601. The listed phone number is (541) 841-8110.
What is Grethe Mortenson's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Neonatal, with taxonomy code 363LN0000X.
Is Grethe Mortenson enrolled in Medicare?
Yes. Grethe Mortenson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Grethe Mortenson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Grethe Mortenson reassigns Medicare benefits to 11 organizations: Saint Alphonsus Medical Center- Ontario Inc (Ontario, OR), Allina Health System (Cokato, MN), Openloop Healthcare Partners PC (Des Moines, IA), Lsu Health Sciences Center Shreveport Faculty Group Practice (Shreveport, LA), Froedtert South, Inc. (Kenosha, WI) and 6 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Grethe Mortenson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Grethe Mortenson accept?
Health plans from Ambetter Health, AmeriHealth Caritas Next, Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Nebraska and Cigna HealthCare of Arizona, Inc and 4 other insurers list Grethe Mortenson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Grethe Mortenson was last updated on August 8, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Grethe June Mortenson, CRNP · NPI 1205183415
Neonatal physician in Klamath Falls, Oregon. Individual provider, active in the CMS NPPES registry since August 7, 2012.
## Identity
- **NPI:** 1205183415 (Entity type: Individual)
- **Enumerated:** August 7, 2012
- **Primary specialty:** Nurse Practitioner - Neonatal · taxonomy 363LN0000X
- **State license:** SP029056 (Pennsylvania)
- **Sole proprietor:** No
## Practice location
- **Address:** 2074 S 6TH ST, Klamath Falls, OR 97601
- **Phone:** (541) 841-8110 · **Fax:** (541) 885-5512
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 11 organizations under Medicare reassignment (form CMS-855R): Saint Alphonsus Medical Center- Ontario Inc (NPI 1093034159, Ontario, OR); Allina Health System (NPI 1386940187, Cokato, MN); Openloop Healthcare Partners PC (NPI 1245820661, Des Moines, IA); Lsu Health Sciences Center Shreveport Faculty Group Practice (NPI 1013374222, Shreveport, LA); Froedtert South, Inc. (NPI 1558305284, Kenosha, WI); and 6 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2012
## Record status
- **NPPES last updated:** August 8, 2025
- **Other identifiers:** Medicaid 500827451 (OR); Medicaid 1205183415 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1205183415) · Data from the CMS NPPES public registry.