John Tsui
NPI 1689145955 · Registered Respiratory Therapist · San Leandro, CA
John Tsui is a Registered Respiratory Therapist provider in San Leandro, CA (NPI 1689145955).
Provider details
- NPI number
- 1689145955
- Entity type
- Individual
- Primary specialty
- Registered Respiratory TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- 25351 (CA)
Specialties & taxonomies
Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
7 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
Registry dates
- Enumerated
- 2018-12-16
- Last updated
- 2018-12-16
Frequently asked questions
- What is John Tsui's NPI number?
- John Tsui's National Provider Identifier (NPI) is 1689145955, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Tsui's specialty?
- John Tsui is listed in the NPPES registry with a primary specialty of Registered Respiratory Therapist (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).
- Where is John Tsui located?
- John Tsui's practice location on file with NPPES is 2500 Merced St, San Leandro, CA 94577-4201.
- What is John Tsui's phone number?
- The practice phone number listed in the NPPES registry for John Tsui is (510) 454-1000.
- Is John Tsui's NPI active?
- Yes — John Tsui's NPI (1689145955) is active in the NPPES registry as of the last update on 2018-12-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.