Quick answers
- Does Alessa Lopez-Castor accept Medicare assignment?
- Yes. Medicare's clinician data says Alessa Lopez-Castor accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Alessa Lopez-Castor see?
- In 2024, CMS data shows 15 Original Medicare patients and 20 services for Alessa Lopez-Castor. This counts Original Medicare only and measures volume, not quality.
- What is Alessa Lopez-Castor's NPI number?
- 1285661744. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Alessa Lopez-Castor, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 15 |
|---|---|
| Services billed to Medicare | 20 |
| Different services or procedures | 4 |
| Participating Medicare provider | Yes |
| Average age of these patients | 67 |
Most frequent services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)14 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
Hospitals where Alessa Lopez-Castor works
Medicare's Facility Affiliation Data lists Alessa Lopez-Castor at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Providence Regional Medical Center EverettEverett, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 500014
Practice locations
Addresses where Alessa Lopez-Castor is enrolled with Medicare (CMS data updated October 2, 2026).
- 111 SW Naito Pkwy, Suite 200Portland, OR 97204 (503) 563‑7370
- 20046 Walker Rd, Suite 7Shaker Heights, OH 44122 (503) 208‑5061
- 900 Pacific Ave, Fl 5Everett, WA 98201 (425) 258‑7311
- 915 Broadway St, Suite 137Vancouver, WA 98660 (503) 208‑5061
Group practices
Medicare enrollment lists Alessa Lopez-Castor as a member of these groups (CMS data updated October 2, 2026).
- Boulder Care Provider Group PA119 clinicians in the group
- Providence Health and Services-Wa25 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Portland
Clinicians with the same Medicare primary specialty in Portland, OR — not a recommendation.
Other clinicians in Boulder Care Provider Group PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2004 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1285661744 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians