DR. WILLIAM S. LOUI (M.D.) – Hematology & Oncology Physician, NPI 1346217718
Hematology & Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
39 HEMATOLOGY/ONCOLOGY in HI
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Provider Addresses for DR. WILLIAM S. LOUI (M.D.)
Lusitana Street, Punchbowl, Honolulu, Honolulu County, Hawaii, 96817-1713, United States
HONOLULU, HI 968132435
Phone: (808) 524-6115
Fax: (808) 528-1711
Type: Location
640 ULUKAHIKI ST
KAILUA, HI 967344454
Phone: (808) 263-5011
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 93 Open Payments records for all available years, with a total value of $2,853.
Total Amount is formed as General ($2,853) + Research ($0) + Ownership ($0) = $2,853.
Last reported payment date: 2024-12-19 • Largest payer in this snapshot: Astellas Pharma US Inc ($422).
Total Amount
$2,853
General + Research + Ownership
Payments
93
Total payment records
General Amount
$2,853
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Astellas Pharma US Inc | $422 |
| Novartis Pharmaceuticals Corporation | $260 |
| PFIZER INC. | $194 |
| Alexion Pharmaceuticals, Inc. | $164 |
| Aadi Bioscience, Inc. | $150 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2010-12-10
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20101210000226 | I | Hematology/Oncology | HI | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 636 | 320 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 137 | 86 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 77 | 77 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 29 | 25 | $0 |
Insurance plans in this area (ZIP 96813)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | HI | |
| Internal Medicine | HI | |
| Internal Medicine | OH | |
| Nurse Practitioner | HI | |
| Nurse Practitioner | HI | |
| - | HI | |
| Family Practice, Internal Medicine | WA | |
| Family Practice | HI | |
| - | HI | |
| Family Practice | HI |
Reviews
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