Timothy Tsai, MSN, APRN, FNP-C
NPI 1669844890 · Family Nurse Practitioner · Honolulu, HI
Enrolled with Medicare as Order and Referring Only - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy Tsai, MSN, APRN, FNP-C is a Family Nurse Practitioner provider in Honolulu, HI (NPI 1669844890).
Provider details
- NPI number
- 1669844890
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- MSN, APRN, FNP-C
- Sex
- Male
- Sole proprietor
- Yes
- License
- 1995 (HI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 63 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 183 | 69 |
| Amlodipine Besylate | 174 | 73 |
| Metformin Hcl | 111 | 51 |
| Losartan Potassium | 108 | 35 |
| Lisinopril | 102 | 42 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 76 | 25 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-10-27
- Last updated
- 2015-10-27
Frequently asked questions
- What is Timothy Tsai's NPI number?
- Timothy Tsai's National Provider Identifier (NPI) is 1669844890, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy Tsai's specialty?
- Timothy Tsai is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Timothy Tsai located?
- Timothy Tsai's practice location on file with NPPES is 915 N King St, Honolulu, HI 96817-4544.
- What is Timothy Tsai's phone number?
- The practice phone number listed in the NPPES registry for Timothy Tsai is (510) 565-4775.
- Does Timothy Tsai accept Medicare?
- Timothy Tsai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Timothy Tsai's NPI active?
- Yes — Timothy Tsai's NPI (1669844890) is active in the NPPES registry as of the last update on 2015-10-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.