Quick answers
- Does Nasya N. Sierra accept Medicare assignment?
- Yes. Medicare's clinician data says Nasya N. Sierra 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 Nasya N. Sierra see?
- In 2024, CMS data shows 13 Original Medicare patients and 20 services for Nasya N. Sierra. This counts Original Medicare only and measures volume, not quality.
- What is Nasya N. Sierra's NPI number?
- 1871909283. 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 Nasya N. Sierra, 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 | 13 |
|---|---|
| Services billed to Medicare | 20 |
| Different services or procedures | 11 |
| Participating Medicare provider | Yes |
| Average age of these patients | 61 |
Hospitals where Nasya N. Sierra works
Medicare's Facility Affiliation Data lists Nasya N. Sierra 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.
- Swedish Medical CenterSeattle, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 500027
Practice locations
Addresses where Nasya N. Sierra is enrolled with Medicare (CMS data updated October 2, 2026).
- 550 16th Ave, Suite 100Seattle, WA 98122 (206) 320‑2484
Group practices
Medicare enrollment lists Nasya N. Sierra as a member of this group (CMS data updated October 2, 2026).
- Swedish Health Services21 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Seattle
Clinicians with the same Medicare primary specialty in Seattle, WA — not a recommendation.
Other clinicians in Swedish Health Services
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Washington School Of Medicine |
| Graduation year | 2017 (9 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1871909283 |
| 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