Quick answers
- Where does Chieh C. Ma see patients?
- Medicare's clinician data lists 9 practice locations, including Shoreline, WA, Everett, WA and Marysville, WA. Call before your visit to confirm the address.
- What is Chieh C. Ma's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Chieh C. Ma accept Medicare assignment?
- Yes. Medicare's clinician data says Chieh C. Ma 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 Chieh C. Ma?
- (425) 339-4299, as listed in official Medicare / NPI Registry data.
- What is Chieh C. Ma's NPI number?
- 1770521932. 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 Chieh C. Ma is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 9; the Medicare profile lists all.
- 1201 N 175th StShoreline, WA 98133 (425) 339‑4299
- 1330 Rockefeller AveEverett, WA 98201 (425) 259‑0966
- 1818 121st St SEEverett, WA 98208
- 2901 174th St NEMarysville, WA 98271 (360) 454‑1900
- 3901 Hoyt AveEverett, WA 98201 (425) 339‑5442
Group practices
Medicare enrollment lists Chieh C. Ma as a member of this group (CMS data updated 2026-10-02).
- Optum Care Washington PLLC683 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Shoreline
Clinicians with the same Medicare primary specialty in Shoreline, WA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1770521932 |
| 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