Eugene W Tsai MD a Professional Medical Corporation
NPI 1134453392 · Allergy & Immunology Physician · Los Alamitos, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Eugene W Tsai MD a Professional Medical Corporation is a Allergy & Immunology Physician organization in Los Alamitos, CA (NPI 1134453392).
Provider details
- NPI number
- 1134453392
- Entity type
- Organization
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Eugene Tsai, Physician(562) 594-8831
- License
- A70444 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 yrs in NPPES registry
- Profile completeness38% of score
100% 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)
- 12225 South StSuite 102Artesia, CA 90701-7053Phone: (562) 865-2402Fax: (562) 865-6621
Registry dates
- Enumerated
- 2009-09-21
- Last updated
- 2018-05-02
Frequently asked questions
- What is Eugene W Tsai MD a Professional Medical Corporation's NPI number?
- Eugene W Tsai MD a Professional Medical Corporation's National Provider Identifier (NPI) is 1134453392, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Eugene W Tsai MD a Professional Medical Corporation?
- Eugene W Tsai MD a Professional Medical Corporation is classified in the NPPES registry as Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is Eugene W Tsai MD a Professional Medical Corporation located?
- Eugene W Tsai MD a Professional Medical Corporation's practice location on file with NPPES is 3801 Katella Ave Ste 222, Los Alamitos, CA 90720-3365.
- What is Eugene W Tsai MD a Professional Medical Corporation's phone number?
- The practice phone number listed in the NPPES registry for Eugene W Tsai MD a Professional Medical Corporation is (562) 594-8831.
- Does Eugene W Tsai MD a Professional Medical Corporation accept Medicare?
- Eugene W Tsai MD a Professional Medical Corporation is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Eugene W Tsai MD a Professional Medical Corporation?
- The authorized official listed on Eugene W Tsai MD a Professional Medical Corporation's NPPES record is Eugene Tsai, Physician. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Eugene W Tsai MD a Professional Medical Corporation's NPI active?
- Yes — Eugene W Tsai MD a Professional Medical Corporation's NPI (1134453392) is active in the NPPES registry as of the last update on 2018-05-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.