Internal Medicine, Nephrology · Atlanta, GA
NPI
1427194257
Since 2007
Specialty
Internal Medicine, Nephrology
Code 207RN0300X
Group practices
1
Medicare group memberships
Hospitals
3
Hospital affiliations
1860 Peachtree Rd NE
Atlanta, GA, 30309
Phone (404) 355-7375
Groups this clinician bills Medicare through
Medicare paid, 2024
$173K
2,542 services
Medicare patients, 2024
575
Average age 74
Drug cost, 2024
$893K
3,576 prescriptions
Company payments, 2025
$372
From 7 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Gautham Viswanathan was code 81003 (clinical chemistry), 585 times for 342 patients. In total Gautham Viswanathan billed 2,542 services in 28 codes, and Medicare paid $173K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2026-09-09.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 81003 Clinical Chemistry | Office | 585 | 342 | $2.19 | $1,282 |
| 99214 Office E&M - Established | Office | 540 | 318 | $95.01 | $51K |
| 99213 Office E&M - Established | Office | 196 | 179 | $74.75 | $15K |
| 99458 E&M - Miscellaneous | Office | 175 | 20 | $33.37 | $5,840 |
| 99232 Hospital E&M - Subsequent | Facility | 137 | 85 | $63.91 | $8,756 |
| 99457 E&M - Miscellaneous | Office | 121 | 24 | $41.15 | $4,979 |
| 90970 ESRD Related Services (not dialysis) | Office | 118 | 15 | $7.88 | $930 |
| 90960 ESRD Related Services (not dialysis) | Office | 116 | 25 | $292.87 | $34K |
| G2211 Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's | Office | 100 | 85 | $13.74 | $1,374 |
| 99454 E&M - Miscellaneous | Office | 82 | 19 | $40.00 | $3,280 |
| 99204 Office E&M - New | Office | 74 | 74 | $119.55 | $8,847 |
| 99233 Hospital E&M - Subsequent | Facility | 62 | 51 | $94.96 | $5,887 |
| 99223 Hospital E&M - Initial | Facility | 47 | 43 | $137.41 | $6,458 |
| 90961 ESRD Related Services (not dialysis) | Office | 27 | 16 | $246.75 | $6,662 |
| 99203 Office E&M - New | Office | 26 | 26 | $80.40 | $2,090 |
By year: 2022 $177K for 2,500 services; 2023 $138K for 2,183 services; 2024 $173K for 2,542 services.
Lab tests billed to Medicare, 2024
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 81003 Clinical Chemistry | 585 | 342 | $2.19 | $1,282 |
| 36415 Venipuncture Blood Collection | 21 | 21 | $8.65 | $182 |
Medicare prescription drug claims, 2024
In 2024, the drug Gautham Viswanathan prescribed most often to Medicare patients was Amlodipine Besylate, with 272 prescriptions and refills. In total Gautham Viswanathan wrote 3,576 Medicare prescriptions that cost $893K.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Amlodipine Besylate Generic | 272 | 775 | 112 | $1,579 |
| Farxiga Dapagliflozin Propanediol | 183 | 340 | 44 | $184K |
| Jardiance Empagliflozin | 164 | 302 | 49 | $170K |
| Losartan Potassium Generic | 164 | 478 | 59 | $1,326 |
| Hydralazine Hcl Generic | 138 | 338 | 48 | $1,931 |
| Allopurinol Generic | 136 | 388 | 42 | $1,423 |
| Torsemide Generic | 131 | 302 | 46 | $2,047 |
| Spironolactone Generic | 129 | 356 | 47 | $1,311 |
| Furosemide Generic | 111 | 300 | 46 | $727 |
| Veltassa Patiromer Calcium Sorbitex | 111 | 172 | 26 | $164K |
| Doxazosin Mesylate Generic | 103 | 225 | 30 | $1,919 |
| Nifedipine Er Nifedipine | 87 | 205 | 30 | $3,101 |
| Lisinopril Generic | 87 | 261 | 34 | $767 |
| Kerendia Finerenone | 85 | 155 | 22 | $97K |
| Potassium Chloride Generic | 81 | 210 | 36 | $1,547 |
Brand drugs: 718 claims; generic drugs: 2,858 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Gautham Viswanathan $372 ($372 in general payments such as food, travel and fees) from 7 companies. The largest payer was Novartis Pharmaceuticals Corporation with $177.
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.