Quick answers
- Does Zachary Ashwell accept Medicare assignment?
- Yes. Medicare's clinician data says Zachary Ashwell 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 Zachary Ashwell see?
- In 2024, CMS data shows 4,437 Original Medicare patients and 15,464 services for Zachary Ashwell. This counts Original Medicare only and measures volume, not quality.
- What is Zachary Ashwell's NPI number?
- 1396189445. 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 Zachary Ashwell, 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 | 4,437 |
|---|---|
| Services billed to Medicare | 15,464 |
| Different services or procedures | 152 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Injection, gadoterate meglumine, 0.1 ml (A9575)6,233 services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)1,846 services
- Injection, bupivicaine, not otherwise specified, 0.5 mg (J0665)1,111 services
- X-ray of chest, 1 view (71045)510 services
- Mri scan of lower spinal canal without contrast (72148)383 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 cholesterol72%
- High blood pressure70%
- Arthritis70%
- Ischemic heart disease27%
- Depression27%
- Anxiety25%
Hospitals where Zachary Ashwell works
Medicare's Facility Affiliation Data lists Zachary Ashwell 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.
- Northwest Specialty HospitalPost Falls, ID · Acute Care Hospital · Emergency services: not listed by Medicare · CCN 130066
- Overlake Hospital Medical Center & ClinicsBellevue, WA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 500051
- Swedish IssaquahIssaquah, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 500152
- Swedish Medical CenterSeattle, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 500027
- Swedish Medical Center / Cherry HillSeattle, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 500025
Practice locations
Addresses where Zachary Ashwell is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 14; the Medicare profile lists all.
- 11521 NE 128th St, Suite 200Kirkland, WA 98034 (425) 952‑6100
- 1229 Madison St, Suite 900Seattle, WA 98104 · Radia Imaging Center Holdings LLC (206) 292‑6233
- 12731 SE 25th PlBellevue, WA 98005 · Medford Radiological Group PC (541) 618‑5800
- 13020 Meridian Ave SEverett, WA 98208 (425) 563‑1500
- 2141 272nd Way SESammamish, WA 98075 · Tower Imaging Medical Associates Inc (323) 549‑3030
Group practices
Medicare enrollment lists Zachary Ashwell as a member of these groups (CMS data updated October 2, 2026).
- County of Santa Clara1,022 clinicians in the group
- Optum Care Washington PLLC683 clinicians in the group
- Radia California Radiology Medical Group Inc136 clinicians in the group
- Radia Oregon Radiology Medical Group LLC121 clinicians in the group
- Evergreen Radia LLC120 clinicians in the group
- Swedish Radia Imaging Center at Edmonds LLC112 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Kirkland
Clinicians with the same Medicare primary specialty in Kirkland, WA — not a recommendation.
Other clinicians in County of Santa Clara
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | George Washington University School Of Medicine |
| Graduation year | 2013 (13 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1396189445 |
| 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