Quick answers
- Does Karlee J. Ausk accept Medicare assignment?
- Yes. Medicare's clinician data says Karlee J. Ausk 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 Karlee J. Ausk see?
- In 2024, CMS data shows 231 Original Medicare patients and 378 services for Karlee J. Ausk. This counts Original Medicare only and measures volume, not quality.
- What is Karlee J. Ausk's NPI number?
- 1336159789. 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 Karlee J. Ausk, 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 | 231 |
|---|---|
| Services billed to Medicare | 378 |
| Different services or procedures | 32 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Biopsy of large bowel using a flexible endoscope (45380)93 services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)52 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)45 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)34 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)21 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 cholesterol61%
- High blood pressure59%
- Arthritis43%
- Osteoporosis23%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)20%
- Anxiety19%
Hospitals where Karlee J. Ausk works
Medicare's Facility Affiliation Data lists Karlee J. Ausk 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.
- Overlake Hospital Medical Center & ClinicsBellevue, WA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 500051
Practice locations
Addresses where Karlee J. Ausk is enrolled with Medicare (CMS data updated October 2, 2026).
- 1135 116th Ave NE, Suite 560Bellevue, WA 98004 (425) 454‑4768
- 1301 4th Ave NW, Unit 303Issaquah, WA 98027 (425) 270‑6363
Group practices
Medicare enrollment lists Karlee J. Ausk as a member of this group (CMS data updated October 2, 2026).
- Washington Gastroenterology PLLC143 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Bellevue
Clinicians with the same Medicare primary specialty in Bellevue, WA — not a recommendation.
Other clinicians in Washington Gastroenterology PLLC
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 | 2005 (21 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) | 1336159789 |
| 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