Tsay MD Incorporated
NPI 1538904123 · Family Medicine Physician · Costa Mesa, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tsay MD Incorporated is a Family Medicine Physician organization in Costa Mesa, CA (NPI 1538904123).
Provider details
- NPI number
- 1538904123
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Trevor Tsay, Physician/Owner(949) 791-8888
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
2 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Other names (DBA / former)
- Doing business as
- Amity Health Direct Primary Care
Registry dates
- Enumerated
- 2024-06-26
- Last updated
- 2024-06-26
- Certified
- 2024-06-26
Frequently asked questions
- What is Tsay MD Incorporated's NPI number?
- Tsay MD Incorporated's National Provider Identifier (NPI) is 1538904123, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Tsay MD Incorporated?
- Tsay MD Incorporated is classified in the NPPES registry as Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tsay MD Incorporated located?
- Tsay MD Incorporated's practice location on file with NPPES is 1640 Newport Blvd Ste 440, Costa Mesa, CA 92627-3786.
- What is Tsay MD Incorporated's phone number?
- The practice phone number listed in the NPPES registry for Tsay MD Incorporated is (949) 791-8888.
- Does Tsay MD Incorporated accept Medicare?
- Tsay MD Incorporated 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 Tsay MD Incorporated?
- The authorized official listed on Tsay MD Incorporated's NPPES record is Trevor Tsay, Physician/Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Tsay MD Incorporated's NPI active?
- Yes — Tsay MD Incorporated's NPI (1538904123) is active in the NPPES registry as of the last update on 2024-06-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.