Winson Koo, M.D.
NPI 1558526004 · Family Medicine Physician · Mililani, HI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Winson Koo, M.D. is a Family Medicine Physician provider in Mililani, HI (NPI 1558526004).
Provider details
- NPI number
- 1558526004
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MDR5499 (HI)
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
17 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 · 68 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 195 | 64 |
| Losartan Potassium | 143 | 45 |
| Lisinopril | 131 | 44 |
| Tamsulosin Hcl | 126 | 47 |
| Amlodipine Besylate | 94 | 33 |
| Allopurinol | 92 | 28 |
| Furosemide | 76 | 24 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-07-24
- Last updated
- 2021-12-15
Frequently asked questions
- What is Winson Koo's NPI number?
- Winson Koo's National Provider Identifier (NPI) is 1558526004, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Winson Koo's specialty?
- Winson Koo is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Winson Koo located?
- Winson Koo's practice location on file with NPPES is 95-390 Kuahelani Ave, Mililani, HI 96789-1192.
- What is Winson Koo's phone number?
- The practice phone number listed in the NPPES registry for Winson Koo is (808) 627-3239.
- Does Winson Koo accept Medicare?
- Winson Koo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Winson Koo's NPI active?
- Yes — Winson Koo's NPI (1558526004) is active in the NPPES registry as of the last update on 2021-12-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.