Quick answers
- Does Zachary D. Stiles accept Medicare assignment?
- Yes. Medicare's clinician data says Zachary D. Stiles 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 D. Stiles see?
- In 2024, CMS data shows 128 Original Medicare patients and 574 services for Zachary D. Stiles. This counts Original Medicare only and measures volume, not quality.
- What is Zachary D. Stiles's NPI number?
- 1407374747. 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 D. Stiles, 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 | 128 |
|---|---|
| Services billed to Medicare | 574 |
| Different services or procedures | 26 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)200 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)110 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)82 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)43 services
- Hemoglobin a1c level (83036)31 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 pressure74%
- High cholesterol58%
- Arthritis46%
- Diabetes26%
- Chronic kidney disease25%
- Ischemic heart disease20%
Practice locations
Addresses where Zachary D. Stiles is enrolled with Medicare (CMS data updated October 2, 2026).
- 322 W N River DrSpokane, WA 99201 (509) 324‑6464
- 9505 S Steele StTacoma, WA 98444 (253) 597‑6800
Group practices
Medicare enrollment lists Zachary D. Stiles as a member of this group (CMS data updated October 2, 2026).
- Kaiser Foundation Health Plan of Washington1,526 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Spokane
Clinicians with the same Medicare primary specialty in Spokane, WA — not a recommendation.
Other clinicians in Kaiser Foundation Health Plan of Washington
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1407374747 |
| 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
- 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