Winson F. Koo, M.D.
Family Medicine Physician · Mililani, HI
Winson F. Koo, M.D. is a family medicine physician with a practice address in Mililani, Hawaii, and NPI 1558526004, issued on Jul 24, 2008. Check the license (Hawaii MDR5499, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Winson F. Koo
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MDR5499 HI
Self-reported in NPPES; status is on the state search - Practice location
- 95-390 Kuahelani Ave, Mililani, HI 96789
- Phone
- (808) 627-3239
- Enumerated
- Jul 24, 2008
- Record last updated
- Dec 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20111110000312); accepts Medicare assignment
- Medical or professional school
- Pennsylvania State University College Of Medicine, 2008
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 730 in Hawaii → Look up another NPI →
Also registered at 95-390 Kuahelani Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kumiko Aman, M.D.Student in an Organized Health Care Education/Training Program1396005534
- Lee Buenconsejo-Lum, MDFamily Medicine Physician1669442851
- Nicole Cardillo, OT/CHTHand Occupational Therapist1144227091
- Tai-Ho Chen, MDFamily Medicine Physician1932189784
- Jason Crookham, DOFamily Medicine Physician1396940292
- Peter Donnelly, MDFamily Medicine Physician1871573626
Verify Winson F. Koo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license MDR5499Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11% fewer Medicare Part D claims than the average family medicine physician in 2024
3,171 Medicare Part D claims for 298 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 85 claims were for opioids.
Most prescribed
- Atorvastatin Calcium195 claims
- Losartan Potassium143 claims
- Lisinopril131 claims
- Tamsulosin Hcl126 claims
- Amlodipine Besylate94 claims
- Allopurinol92 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Permanente Medical Group IncSanta Clara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Winson F. Koo among 730 family medicine physician records in Hawaii
Winson F. Koo, M.D. is one of 730 family medicine physician records with a practice address in Hawaii. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 53% of them.
- NPI issued2008 · 53% of these records are older, 43% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2008 · median 2006 among the 383 with a school on file
- Record last updated2021 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
31 family medicine physician records list a practice address in Mililani
They are 31 of the 978 NPPES records with a practice address in Mililani, and 730 family medicine physician records in Hawaii.
All 730 in Hawaii → Every provider in Mililani → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Lee Buenconsejo-Lum, MDMililani, HI 967891669442851
- Tai-Ho Chen, MDMililani, HI 967891932189784
- Jason Crookham, DOMililani, HI 967891396940292
- Thuy Doan, MDMililani, HI 967891578643912
- Peter Donnelly, MDMililani, HI 967891871573626
- Steven Hankins, M.D., M.P.H., M.T.S.Mililani, HI 967891144219775
- Allen Hixon, MDMililani, HI 967891306826151
- Aaron Kauhane, D.O.Mililani, HI 967891528157757
Common questions
What is Winson F. Koo, M.D.'s NPI number?
Winson F. Koo, M.D.'s National Provider Identifier (NPI) is 1558526004, issued on Jul 24, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Winson F. Koo, M.D. located?
The NPPES record lists a practice address at 95-390 Kuahelani Ave, Mililani, HI, 96789. Phone: (808) 627-3239. Providers update this record themselves, so call before visiting.
How can I verify Winson F. Koo, M.D.'s license?
NPPES lists Hawaii license number MDR5499, as entered by the provider. Search the Hawaii Medical Board at https://cca.hawaii.gov/pvl/boards/medical/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Winson F. Koo, M.D. prescribe under Medicare Part D?
In 2024, Winson F. Koo, M.D. had 3,171 Medicare Part D claims for 298 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.