OrganizationActive
Clark S Tsai, M.D. Inc
NPI 1932476991 · Ophthalmology Physician · Oakland, CA
Clark S Tsai, M.D. Inc is a Ophthalmology Physician organization in Oakland, CA (NPI 1932476991).
Provider details
- NPI number
- 1932476991
- Entity type
- Organization
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Clark Tsai, Ceo/President(925) 864-8886
- License
- G76192 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(80/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 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
638 Webster St
Suite 358
Oakland, CA 94607-4168
Phone: (925) 864-8886
Fax: (925) 689-7748
Street-level locationGet directions
Mailing address
2225 Port Chicago Hwy
Concord, CA 94520-2051
Registry dates
- Enumerated
- 2011-11-18
- Last updated
- 2011-12-09
Frequently asked questions
- What is Clark S Tsai, M.D. Inc's NPI number?
- Clark S Tsai, M.D. Inc's National Provider Identifier (NPI) is 1932476991, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Clark S Tsai, M.D. Inc?
- Clark S Tsai, M.D. Inc is classified in the NPPES registry as Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Clark S Tsai, M.D. Inc located?
- Clark S Tsai, M.D. Inc's practice location on file with NPPES is 638 Webster St, Oakland, CA 94607-4168.
- What is Clark S Tsai, M.D. Inc's phone number?
- The practice phone number listed in the NPPES registry for Clark S Tsai, M.D. Inc is (925) 864-8886.
- Who is the authorized official for Clark S Tsai, M.D. Inc?
- The authorized official listed on Clark S Tsai, M.D. Inc's NPPES record is Clark Tsai, Ceo/President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Clark S Tsai, M.D. Inc's NPI active?
- Yes — Clark S Tsai, M.D. Inc's NPI (1932476991) is active in the NPPES registry as of the last update on 2011-12-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.