Melissa Rhyasen, P.A.
NPI 1336411412 · Medical Physician Assistant · Lake Oswego, OR
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Melissa Rhyasen, P.A. is a Medical Physician Assistant provider in Lake Oswego, OR (NPI 1336411412).
Provider details
- NPI number
- 1336411412
- Entity type
- Individual
- Primary specialty
- Medical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- P.A.
- Sex
- Female
- Sole proprietor
- No
- License
- PA179385 (OR)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
14 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
4 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$153 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 349 Se 7th AveHillsboro, OR 97123-4112Phone: (503) 905-9006
- 966 12th St Se Ste 130Salem, OR 97302-2860Phone: (503) 905-9006Fax: (541) 210-8913
- 1815 Hudson StLongview, WA 98632-2913Phone: (503) 905-9006
Registry dates
- Enumerated
- 2012-02-03
- Last updated
- 2024-12-23
- Certified
- 2024-12-16
Frequently asked questions
- What is Melissa Rhyasen's NPI number?
- Melissa Rhyasen's National Provider Identifier (NPI) is 1336411412, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Melissa Rhyasen's specialty?
- Melissa Rhyasen is listed in the NPPES registry with a primary specialty of Medical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Melissa Rhyasen located?
- Melissa Rhyasen's practice location on file with NPPES is 123 C Ave, Lake Oswego, OR 97034-2353.
- What is Melissa Rhyasen's phone number?
- The practice phone number listed in the NPPES registry for Melissa Rhyasen is (503) 905-9006.
- Does Melissa Rhyasen accept Medicare?
- Melissa Rhyasen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Melissa Rhyasen's NPI active?
- Yes — Melissa Rhyasen's NPI (1336411412) is active in the NPPES registry as of the last update on 2024-12-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.