Doctor profile · Federal record
Dr. Stephen Oishi, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Honolulu, HI
- NPI 1194813832
- Accepts Medicare
- 42 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
321 N Kuakini St, Suite #201
Honolulu, HI 968172364
(808) 523-8611
Credentials & registration
- NPI registered
- October 2006 — 20 yrs on file
- Profile last updated
- July 8, 2007
- Year of graduation
- 1984 — 42 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Hawaii #MD-7480
- Medicaid
- HI #06982701
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1194813832. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
882
Distinct HCPCS
7
Medicare allowed
$115,869
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 567 | 252 | $134 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 213 | 213 | $138 | |
99497 |
Advance care planning, first 30 minutes | 30 | 29 | $86 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 26 | 25 | $96 | |
99496 |
Transitional care management services for problem of high complexity | 16 | 16 | $297 | |
93000 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 15 | 15 | $16 | |
96372 |
Injection of drug or substance under skin or into muscle | 15 | 11 | $15 |
In context: peer comparison
Among 114 peers in Honolulu Internal Medicine Physician, average services per provider: 127. This provider delivers 6.9× the peer median.Open Payments
Industry payments received
All-time total
$82
Transactions
3
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| AstraZeneca Pharmaceuticals Lp | 2 | $50.25 | |
| Bayer Healthcare Pharmaceuticals INC. | 1 | $31.41 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,358
Patients
698
Total drug cost
$639,761
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 398 | 114 | $14,456 |
| Rosuvastatin Calcium | Generic | 334 | 101 | $22,519 |
| Amlodipine Besylate | Generic | 278 | 81 | $3,759 |
| Losartan Potassium | Generic | 253 | 76 | $7,790 |
| Simvastatin | Generic | 131 | 37 | $2,684 |
| Metformin Hcl | Generic | 124 | 40 | $1,895 |
| Levothyroxine Sodium | Generic | 120 | 34 | $1,772 |
| Telmisartan | Generic | 120 | 37 | $5,699 |
| Lisinopril | Generic | 105 | 35 | $1,005 |
| Farxiga (Dapagliflozin Propanediol) | Brand | 89 | 29 | $136,101 |
Hospital affiliations
Frequently asked questions
What is Dr. Stephen Oishi's medical specialty?
Dr. Stephen Oishi practices Internal Medicine Physician in Honolulu, HI.
Where does Dr. Stephen Oishi practice?
Dr. Stephen Oishi practices at 321 N Kuakini St, Honolulu, HI 968172364. Office phone: 8085238611.
What is Dr. Stephen Oishi's NPI?
Dr. Stephen Oishi's National Provider Identifier (NPI) is 1194813832, issued by NPPES.
Does Dr. Stephen Oishi accept Medicare assignment?
Yes. Dr. Stephen Oishi accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Stephen Oishi commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439); Advance care planning (HCPCS 99497). Source: CMS Medicare Physician & Other Practitioners file.