Irwin Tsai
NPI 1598116824 · Addiction (Substance Use Disorder) Counselor · Bellingham, WA
Irwin Tsai is a Addiction (Substance Use Disorder) Counselor provider in Bellingham, WA (NPI 1598116824).
Provider details
- NPI number
- 1598116824
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 60667145 (WA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
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
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
- 2016-06-28
- Last updated
- 2017-03-03
Frequently asked questions
- What is Irwin Tsai's NPI number?
- Irwin Tsai's National Provider Identifier (NPI) is 1598116824, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Irwin Tsai's specialty?
- Irwin Tsai is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Irwin Tsai located?
- Irwin Tsai's practice location on file with NPPES is 609 Northshore Dr, Bellingham, WA 98226-4414.
- What is Irwin Tsai's phone number?
- The practice phone number listed in the NPPES registry for Irwin Tsai is (360) 676-6000.
- Is Irwin Tsai's NPI active?
- Yes — Irwin Tsai's NPI (1598116824) is active in the NPPES registry as of the last update on 2017-03-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.