Internal Medicine · San Antonio, TX
NPI
1255350427
Since 2006
Specialty
Internal Medicine
Code 207R00000X
Group practices
1
Medicare group memberships
Hospitals
0
Hospital affiliations
720 Pleasanton Rd
San Antonio, TX, 78214
Phone (210) 921-3800
Groups this clinician bills Medicare through
Medicare paid, 2024
$8,374
297 services
Medicare patients, 2024
36
Average age 77
Drug cost, 2024
$2.1M
12,513 prescriptions
Company payments, 2025
$855
From 9 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Melissa Martinez-Diaz was code 99214 (office e&m - established), 65 times for 29 patients. In total Melissa Martinez-Diaz billed 297 services in 35 codes, and Medicare paid $8,374.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2022-01-07.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99214 Office E&M - Established | Office | 65 | 29 | $81.36 | $5,289 |
| 82962 Clinical Chemistry | Office | 32 | 15 | $3.21 | $103 |
| G0008 Administration of influenza virus vaccine | Office | 11 | 11 | $31.03 | $341 |
By year: 2022 $12K for 483 services; 2023 $9,550 for 318 services; 2024 $8,374 for 297 services.
Lab tests billed to Medicare, 2024
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 82962 Clinical Chemistry | 32 | 15 | $3.21 | $103 |
Medicare prescription drug claims, 2024
In 2024, the drug Melissa Martinez-Diaz prescribed most often to Medicare patients was Rosuvastatin Calcium, with 665 prescriptions and refills. In total Melissa Martinez-Diaz wrote 12,513 Medicare prescriptions that cost $2.1M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Rosuvastatin Calcium Generic | 665 | 2,023 | 224 | $12K |
| Losartan Potassium Generic | 561 | 1,727 | 184 | $5,687 |
| Atorvastatin Calcium Generic | 557 | 1,647 | 180 | $5,311 |
| Metformin Hcl Generic | 459 | 1,296 | 140 | $3,109 |
| Lisinopril Generic | 390 | 1,174 | 121 | $3,325 |
| Gabapentin Generic | 361 | 929 | 145 | $7,370 |
| Amlodipine Besylate Generic | 355 | 1,104 | 114 | $2,273 |
| Levothyroxine Sodium Generic | 317 | 870 | 95 | $2,698 |
| Fluticasone Propionate Generic | 311 | 569 | 143 | $6,588 |
| Baclofen Generic | 298 | 414 | 126 | $3,748 |
| Omeprazole Generic | 264 | 761 | 91 | $7,001 |
| Sertraline Hcl Generic | 250 | 703 | 98 | $1,871 |
| Alendronate Sodium Generic | 243 | 616 | 82 | $1,552 |
| Duloxetine Hcl Generic | 227 | 632 | 81 | $12K |
| Vitamin D2 Ergocalciferol (Vitamin D2) | 222 | 636 | 93 | $2,339 |
Brand drugs: 2,087 claims; generic drugs: 10,287 claims; opioid claims: 47.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Melissa Martinez-Diaz $855 ($855 in general payments such as food, travel and fees) from 9 companies. The largest payer was Novo Nordisk Inc with $222.
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.