Grethe Mortenson, CRNP
NPI 1205183415 · Neonatal Nurse Practitioner · Klamath Falls, OR
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grethe Mortenson, CRNP is a Neonatal Nurse Practitioner provider in Klamath Falls, OR (NPI 1205183415).
Provider details
- NPI number
- 1205183415
- Entity type
- Individual
- Primary specialty
- Neonatal Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CRNP
- Sex
- Female
- Sole proprietor
- No
- License
- 1916 (MN)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
- Nurse Practitioner363L00000X
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
13 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
7 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 13 | — |
| Ondansetron Hcl | 13 | 13 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (6)
- 2925 Chicago AveMinneapolis, MN 55407-1321Phone: (612) 262-9000
- 351 Sw 9th StOntario, OR 97914-2639Phone: (541) 881-7184Fax: (541) 881-7016
- 500 University DrHershey, PA 17033-2360Phone: (800) 243-1455
- 4800 Friendship AvePittsburgh, PA 15224-1722Phone: (412) 578-5858
- 405 Stageline RdHudson, WI 54016-7848Phone: (715) 531-6000
- 9555 76th StPleasant Prairie, WI 53158-1984Phone: (262) 577-8005Fax: (262) 577-8015
Registry dates
- Enumerated
- 2012-08-07
- Last updated
- 2025-08-08
- Certified
- 2025-08-08
Frequently asked questions
- What is Grethe Mortenson's NPI number?
- Grethe Mortenson's National Provider Identifier (NPI) is 1205183415, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grethe Mortenson's specialty?
- Grethe Mortenson is listed in the NPPES registry with a primary specialty of Neonatal Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Grethe Mortenson located?
- Grethe Mortenson's practice location on file with NPPES is 2074 S 6th St, Klamath Falls, OR 97601.
- What is Grethe Mortenson's phone number?
- The practice phone number listed in the NPPES registry for Grethe Mortenson is (541) 841-8110.
- Does Grethe Mortenson accept Medicare?
- Grethe Mortenson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Grethe Mortenson's NPI active?
- Yes — Grethe Mortenson's NPI (1205183415) is active in the NPPES registry as of the last update on 2025-08-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.