Quick answers
- Does Alisse M. Ryan accept Medicare assignment?
- Yes. Medicare's clinician data says Alisse M. Ryan 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 Alisse M. Ryan see?
- In 2024, CMS data shows 323 Original Medicare patients and 1,589 services for Alisse M. Ryan. This counts Original Medicare only and measures volume, not quality.
- What is Alisse M. Ryan's NPI number?
- 1558459255. 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 Alisse M. Ryan, 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 | 323 |
|---|---|
| Services billed to Medicare | 1,589 |
| Different services or procedures | 47 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)465 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)284 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)191 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)114 services
- Online digital evaluation and management service for an established patient for up to 7 days, total time 5-10 minutes (99421)97 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 cholesterol68%
- High blood pressure62%
- Arthritis48%
- Depression25%
- Anxiety21%
- Osteoporosis21%
Hospitals where Alisse M. Ryan works
Medicare's Facility Affiliation Data lists Alisse M. Ryan 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.
- Highline Medical CenterBurien, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 500011
- Virginia Mason Medical CenterSeattle, WA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 500005
Practice locations
Addresses where Alisse M. Ryan is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 13; the Medicare profile lists all.
- 100 NE Gilman BlvdIssaquah, WA 98027 (425) 557‑8000
- 10601 5th Ave NE, Suite 201 WestSeattle, WA 98125 (206) 287‑6400
- 1100 9th AveSeattle, WA 98101
- 11695 NE 4th StBellevue, WA 98004 (425) 637‑1855
- 1344 Wintergreen Ln NEBainbridge Island, WA 98110 (206) 842‑5632
Group practices
Medicare enrollment lists Alisse M. Ryan as a member of this group (CMS data updated October 2, 2026).
- Virginia Mason Medical Center867 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Issaquah
Clinicians with the same Medicare primary specialty in Issaquah, WA — not a recommendation.
Other clinicians in Virginia Mason Medical Center
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 | 1998 (28 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) | 1558459255 |
| 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