NPPES file of Aug 9, 2026

Grethe June Mortenson, CRNP

Neonatal Nurse Practitioner · Klamath Falls, OR

Grethe June Mortenson, CRNP is a neonatal nurse practitioner with a practice address in Klamath Falls, Oregon, and NPI 1205183415, issued on Aug 7, 2012. Check the license (Oregon 10015210, as entered in NPPES) with the Oregon board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1205183415
Name
Grethe June Mortenson
Credential
CRNP
Primary taxonomy
Neonatal Nurse Practitioner 363LN0000X
License numbers
10015210 OR
SP029056 PA
281915 AZ
1916 MN
SP029043 PA
and 1 more
Self-reported in NPPES; status is on the state search
Practice location
2074 S 6TH St, Klamath Falls, OR 97601
Phone
(541) 841-8110
Enumerated
Aug 7, 2012
Record last updated
Aug 8, 2025
Fax
(541) 885-5512
Medicaid IDs
500827451 OR
1205183415 WI
Medicare enrollment
Enrolled (PECOS I20230919002328); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 2074 S 6TH St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Brittney AgardCase Manager/Care Coordinator1841004736
  2. Scott Alexander, FNPFamily Nurse Practitioner1831439454
  3. Maria Alonso, RNCase Management Registered Nurse1578835856
  4. Roy Babb, PHARM.D.Pharmacist1912549544
  5. Brian Blackman, DNPFamily Nurse Practitioner1356173850
  6. Leonard Brennan, LPC, LCASProfessional Counselor1518323369

Verify Grethe June Mortenson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Oregon board licenses this profession
    Search for license 10015210    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Oregon license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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About as many Medicare Part D claims as the average neonatal nurse practitioner in 2024

224 Medicare Part D claims for 114 beneficiaries, against an average of 225 among the 26 providers of this specialty who prescribed in Part D.

  1. Grethe Mortenson224
  2. Specialty average225

Most prescribed

  1. Furosemide13 claims
  2. Ondansetron Hcl13 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Bills Medicare through one group practice

  1. Openloop Healthcare Partners PCAugusta, ME

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Neonatal Nurse Practitioner providers in Oregon

There are 48 neonatal nurse practitioner records in Oregon.

All 48 in Oregon → Every provider in Klamath Falls →

Other neonatal nurse practitioner records in Oregon

  1. Sandra Banta Wright, NNPPortland, OR1407943459
  2. Susan Bell, DNP, NNPMedford, OR1962957506
  3. Ekaterina Bulaevskaya, NNPPortland, OR1073712386
  4. Joy Carvell, NNPPortland, OR1487131611
  5. Christopher Cary, NNP-BCPortland, OR1235855925
  6. Melinda ChaconPortland, OR1417668617
  7. Chelsea Cieslak, DNP, NNP-BCPortland, OR1225519671
  8. Carol Craig, NNPBend, OR1437458940
  9. Sarah Currier, PHD, NNP-BCPortland, OR1043572811
  10. Karen Duncan, CRNPPortland, OR1750722443

Common questions

What is Grethe June Mortenson, CRNP's NPI number?

Grethe June Mortenson, CRNP's National Provider Identifier (NPI) is 1205183415, issued on Aug 7, 2012. An NPI identifies a provider in billing; it is not a license.

Where is Grethe June Mortenson, CRNP located?

The NPPES record lists a practice address at 2074 S 6TH St, Klamath Falls, OR, 97601. Phone: (541) 841-8110. Providers update this record themselves, so call before visiting.

How can I verify Grethe June Mortenson, CRNP's license?

NPPES lists Oregon license number 10015210, as entered by the provider. Search the Oregon board that licenses this profession; the NPPES record confirms identity only.

How much does Grethe June Mortenson, CRNP prescribe under Medicare Part D?

In 2024, Grethe June Mortenson, CRNP had 224 Medicare Part D claims for 114 beneficiaries; the average among neonatal nurse practitioner prescribers was 225. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.