Doctor profile · Federal record
Dr. Tad Iwanuma, M.D.
Internal Medicine Physician · Honolulu, HI
- NPI 1184600504
- MIPS 92.1 / 100 · 2023
- 21 yrs on file
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
321 N Kuakini St, 703
Honolulu, HI 968172364
(808) 524-4400
Credentials & registration
- NPI registered
- December 2005 — 21 yrs on file
- Profile last updated
- October 17, 2007
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Hawaii #2484
- Medicaid
- HI #03426401
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1184600504. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
924
Distinct HCPCS
5
Medicare allowed
$102,649
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 564 | 203 | $133 | |
G0444 |
Annual depression screening, 5 to 15 minutes | 156 | 155 | $20 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 139 | 139 | $135 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 47 | 41 | $94 | |
99212 |
Established patient office or other outpatient visit, 10-19 minutes | 18 | 15 | $55 |
In context: peer comparison
Among 114 peers in Honolulu Internal Medicine Physician, average services per provider: 127. This provider delivers 7.3× the peer median.Open Payments
Industry payments received
All-time total
$15
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Novo Nordisk INC | 1 | $14.61 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,336
Patients
682
Total drug cost
$238,453
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 415 | 120 | $19,814 |
| Losartan Potassium | Generic | 250 | 73 | $8,034 |
| Losartan-Hydrochlorothiazide (Losartan/Hydrochlorothiazide) | Brand | 241 | 74 | $17,395 |
| Simvastatin | Generic | 237 | 64 | $6,065 |
| Amlodipine Besylate | Generic | 236 | 68 | $3,926 |
| Metformin Hcl | Generic | 149 | 46 | $3,288 |
| Felodipine ER (Felodipine) | Brand | 125 | 38 | $7,424 |
| Metoprolol Succinate | Generic | 113 | 32 | $3,030 |
| Jardiance (Empagliflozin) | Brand | 108 | 28 | $157,122 |
| Famotidine | Generic | 89 | 31 | $2,923 |
Frequently asked questions
What is Dr. Tad Iwanuma's medical specialty?
Dr. Tad Iwanuma practices Internal Medicine Physician in Honolulu, HI.
Where does Dr. Tad Iwanuma practice?
Dr. Tad Iwanuma practices at 321 N Kuakini St, Honolulu, HI 968172364. Office phone: 8085244400.
What is Dr. Tad Iwanuma's NPI?
Dr. Tad Iwanuma's National Provider Identifier (NPI) is 1184600504, issued by NPPES.
What procedures does Dr. Tad Iwanuma commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Annual depression screening, 5 to 15 minutes (HCPCS G0444); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439). Source: CMS Medicare Physician & Other Practitioners file.