Internal Medicine, Gastroenterology · Kailua, HI
NPI
1245214618
Since 2005
Specialty
Internal Medicine, Gastroenterology
Code 207RG0100X
Group practices
3
Medicare group memberships
Hospitals
4
Hospital affiliations
642 Ulukahiki St, Ste 103
Kailua, HI, 96734
Phone (808) 263-5174
Groups this clinician bills Medicare through
Medicare paid, 2024
$40K
417 services
Medicare patients, 2024
202
Average age 74
Drug cost, 2024
$679K
595 prescriptions
Company payments, 2025
$210K
From 18 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Naoky C Tsai was code 99214 (office e&m - established), 135 times for 102 patients. In total Naoky C Tsai billed 417 services in 16 codes, and Medicare paid $40K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2007-10-30.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99214 Office E&M - Established | Office | 135 | 102 | $89.22 | $12K |
| 99214 Office E&M - Established | Facility | 44 | 40 | $74.08 | $3,260 |
| 45380 Lower GI Endoscopy - Other | Facility | 40 | 40 | $78.87 | $3,155 |
| 99204 Office E&M - New | Facility | 40 | 40 | $105.25 | $4,210 |
| 99204 Office E&M - New | Office | 40 | 40 | $118.84 | $4,754 |
| 45385 Colonoscopy - Lesion Removal | Facility | 21 | 21 | $198.42 | $4,167 |
| 43239 Upper GI Endoscopy | Facility | 19 | 19 | $76.67 | $1,457 |
| 99215 Office E&M - Established | Office | 15 | 15 | $136.09 | $2,041 |
| 99203 Office E&M - New | Facility | 11 | 11 | $64.49 | $709 |
By year: 2022 $35K for 300 services; 2023 $40K for 339 services; 2024 $40K for 417 services.
Medicare prescription drug claims, 2024
In 2024, the drug Naoky C Tsai prescribed most often to Medicare patients was Entecavir, with 139 prescriptions and refills. In total Naoky C Tsai wrote 595 Medicare prescriptions that cost $679K.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Entecavir Generic | 139 | 404 | 35 | $147K |
| Vemlidy Tenofovir Alafenamide | 86 | 98 | Under 11 | $146K |
| Ursodiol Generic | 73 | 212 | 22 | $14K |
| Omeprazole Generic | 50 | 142 | 20 | $1,423 |
| Prednisone Generic | 27 | 54 | Under 11 | $103 |
| Tenofovir Disoproxil Fumarate Generic | 25 | 73 | Under 11 | $8,791 |
| Rezdiffra Resmetirom | 17 | 17 | Under 11 | $68K |
| Sucralfate Generic | 15 | 41 | Under 11 | $1,077 |
| Xifaxan Rifaximin | 15 | 17 | Under 11 | $54K |
Brand drugs: 151 claims; generic drugs: 444 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Naoky C Tsai $210K ($155K in general payments such as food, travel and fees and $55K for research) from 18 companies. The largest payer was Madrigal Pharmaceuticals with $98K.
| Company | Payments | Amount |
|---|---|---|
| Madrigal Pharmaceuticals MDGL | 83 | $98K |
| Bausch Health US, LLC BHC | 5 | $55K |
| Ipsen Biopharmaceuticals, Inc IPN.PA | 17 | $29K |
| Gilead Sciences, Inc. GILD | 43 | $24K |
| Echosens North America, Inc. | 2 | $1,512 |
| Abbvie Inc. ABBV | 14 | $830 |
| Janssen Biotech, Inc. JNJ | 20 | $738 |
| Mirum Pharmaceuticals, Inc. MIRM | 5 | $240 |
| AstraZeneca Pharmaceuticals LP AZN | 5 | $208 |
| Novo Nordisk Inc NVO | 5 | $203 |
Official US government data on Original Medicare services, Medicare prescription drug plans and the payments drug and device companies must report. Services with fewer than 11 patients and drugs with fewer than 11 claims are not published. Procedure codes are shown by number with their public category.