Quick answers
- Where does Mark T. Chan see patients?
- Medicare's clinician data lists 5 practice locations, including Clackamas, OR, Salem, OR and Portland, OR. Call before your visit to confirm the address.
- What is Mark T. Chan's specialty?
- Medicare lists Allergy/Immunology as the primary specialty, and also Family Practice.
- Does Mark T. Chan accept Medicare assignment?
- Yes. Medicare's clinician data says Mark T. Chan 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.
- What is the phone number for Mark T. Chan?
- (800) 813-2000, as listed in official Medicare / NPI Registry data.
- What is Mark T. Chan's NPI number?
- 1689779530. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Mark T. Chan is enrolled with Medicare (CMS data updated 2026-10-02).
- 10100 SE Sunnyside RdClackamas, OR 97015 (800) 813‑2000
- 10180 SE Sunnyside RdClackamas, OR 97015 (800) 813‑2000
- 2400 Lancaster Dr NESalem, OR 97305 (800) 813‑2000
- 3600 N Interstate AvePortland, OR 97227 (800) 813‑2000
- 3620 N Interstate AvePortland, OR 97227 (800) 813‑2000
Group practices
Medicare enrollment lists Mark T. Chan as a member of this group (CMS data updated 2026-10-02).
- Kaiser Foundation Health Plan of the Northwest1,807 clinicians in the group
Specialties
- Allergy/Immunologyprimary
- Family Practicealso
Other allergist and immunologists in Clackamas
Clinicians with the same Medicare primary specialty in Clackamas, OR — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1689779530 |
| 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 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