Internal Medicine, Gastroenterology · Gaithersburg, MD
NPI
1083723878
Since 2006
Specialty
Internal Medicine, Gastroenterology
Code 207RG0100X
Group practices
2
Medicare group memberships
Hospitals
1
Hospital affiliations
9057 Shady Grove Ct
Gaithersburg, MD, 20877
Phone (301) 721-1614
Groups this clinician bills Medicare through
Medicare paid, 2024
$103K
1,166 services
Medicare patients, 2024
386
Average age 75
Drug cost, 2024
$277K
2,442 prescriptions
Company payments, 2025
$537
From 4 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Tuanh Tonnu was code 99213 (office e&m - established), 337 times for 193 patients. In total Tuanh Tonnu billed 1,166 services in 27 codes, and Medicare paid $103K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2016-08-02.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99213 Office E&M - Established | Office | 337 | 193 | $61.84 | $21K |
| 99214 Office E&M - Established | Office | 167 | 121 | $87.28 | $15K |
| 43239 Upper GI Endoscopy | Facility | 115 | 113 | $76.77 | $8,829 |
| G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Office | 93 | 93 | $140.87 | $13K |
| 99203 Office E&M - New | Office | 88 | 88 | $71.29 | $6,273 |
| 45380 Lower GI Endoscopy - Other | Facility | 76 | 75 | $113.24 | $8,606 |
| 93000 Electrocardiogram | Office | 66 | 66 | $6.76 | $446 |
| 99204 Office E&M - New | Office | 59 | 59 | $124.48 | $7,344 |
| 45385 Colonoscopy - Lesion Removal | Facility | 42 | 42 | $200.14 | $8,406 |
| G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | Facility | 30 | 30 | $184.95 | $5,548 |
| 45378 Lower GI Endoscopy - Other | Facility | 16 | 16 | $128.04 | $2,049 |
| 99215 Office E&M - Established | Office | 13 | 13 | $113.45 | $1,475 |
By year: 2022 $119K for 1,306 services; 2023 $106K for 1,186 services; 2024 $103K for 1,166 services.
Medicare prescription drug claims, 2024
In 2024, the drug Tuanh Tonnu prescribed most often to Medicare patients was Amlodipine Besylate, with 273 prescriptions and refills. In total Tuanh Tonnu wrote 2,442 Medicare prescriptions that cost $277K.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Amlodipine Besylate Generic | 273 | 787 | 76 | $2,163 |
| Omeprazole Generic | 187 | 394 | 62 | $1,885 |
| Atorvastatin Calcium Generic | 143 | 414 | 40 | $1,594 |
| Metformin Hcl Generic | 109 | 317 | 30 | $1,036 |
| Losartan Potassium Generic | 102 | 300 | 28 | $1,001 |
| Simvastatin Generic | 80 | 240 | 24 | $626 |
| Famotidine Generic | 76 | 168 | 27 | $986 |
| Clenpiq Sod Picosulf/Mag Ox/Citric Ac | 74 | 74 | 69 | $13K |
| Entecavir Generic | 62 | 84 | Under 11 | $23K |
| Sod Sulf-Potass Sulf-Mag Sulf Sodium, Potassium,mag Sulfates | 61 | 61 | 59 | $3,728 |
| Lisinopril Generic | 55 | 165 | 14 | $455 |
| Alendronate Sodium Generic | 52 | 147 | 17 | $561 |
| Lovastatin Generic | 45 | 125 | 12 | $333 |
| Metoprolol Succinate Generic | 40 | 102 | 13 | $619 |
| Pioglitazone Hcl Generic | 40 | 120 | 12 | $726 |
Brand drugs: - claims; generic drugs: 2,181 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Tuanh Tonnu $537 ($537 in general payments such as food, travel and fees) from 4 companies. The largest payer was Gilead Sciences, Inc. with $310.
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.