Quick answers
- Which hospitals does Mark D. Derleth work at?
- Medicare's official clinician data lists Mark D. Derleth at 1 hospital: University of Washington Medical Ctr. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark D. Derleth see patients?
- Medicare's clinician data lists 5 practice locations, including Seattle, WA. Call before your visit to confirm the address.
- What is Mark D. Derleth's specialty?
- Medicare lists Gastroenterology as the primary specialty, and also Internal Medicine.
- Does Mark D. Derleth accept Medicare assignment?
- Yes. Medicare's clinician data says Mark D. Derleth accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Mark D. Derleth offer telehealth?
- Medicare's clinician data says Mark D. Derleth offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mark D. Derleth?
- (206) 364-0500, as listed in official Medicare / NPI Registry data.
- What is Mark D. Derleth's NPI number?
- 1356457063. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark D. Derleth works
Medicare's Facility Affiliation Data lists Mark D. Derleth at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- University of Washington Medical CtrSeattle, WA · Acute Care Hospital · CCN 500008
Practice locations
Addresses where Mark D. Derleth is enrolled with Medicare (CMS data updated 2026-10-02).
- 1550 N 115th StSeattle, WA 98133 (206) 364‑0500
- 1570 N 115th StSeattle, WA 98133 (206) 306‑2800
- 1701 Columbia RdSeattle, WA 98195 (206) 598‑3100
- 1959 NE Pacific StSeattle, WA 98195 (206) 598‑4333
- 325 9th AveSeattle, WA 98104 (206) 731‑3000
Group practices
Medicare enrollment lists Mark D. Derleth as a member of this group (CMS data updated 2026-10-02).
- The Association of University Physicians3,535 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Seattle
Clinicians with the same Medicare primary specialty in Seattle, WA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Boston University School Of Medicine |
| Graduation year | 2006 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1356457063 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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