Ethan Tseng, M.D.
NPI 1033572383 · Emergency Medicine Physician · Seattle, WA
Enrolled with Medicare as Order and Referring Only - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ethan Tseng, M.D. is a Emergency Medicine Physician provider in Seattle, WA (NPI 1033572383).
Provider details
- NPI number
- 1033572383
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 55 Lake Ave NWorcester, MA 01655-0002Phone: (508) 334-1000
Registry dates
- Enumerated
- 2016-04-04
- Last updated
- 2021-05-10
- Certified
- 2021-05-10
Frequently asked questions
- What is Ethan Tseng's NPI number?
- Ethan Tseng's National Provider Identifier (NPI) is 1033572383, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ethan Tseng's specialty?
- Ethan Tseng is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ethan Tseng located?
- Ethan Tseng's practice location on file with NPPES is 201 16th Ave E, Seattle, WA 98112-5226.
- What is Ethan Tseng's phone number?
- The practice phone number listed in the NPPES registry for Ethan Tseng is (206) 326-3000.
- Does Ethan Tseng accept Medicare?
- Ethan Tseng is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ethan Tseng's NPI active?
- Yes — Ethan Tseng's NPI (1033572383) is active in the NPPES registry as of the last update on 2021-05-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.