Internal Medicine · Dallas, TX
NPI
1538239173
Since 2006
Specialty
Internal Medicine
Code 207R00000X
Group practices
1
Medicare group memberships
Hospitals
3
Hospital affiliations
7777 Forest Ln, Building B, Suite416
Dallas, TX, 75230
Phone (972) 566-6764
Groups this clinician bills Medicare through
Medicare paid, 2024
$256K
7,090 services
Medicare patients, 2024
356
Average age 73
Drug cost, 2024
$4.0M
34,251 prescriptions
Company payments, 2025
$5,181
From 38 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Gustavo H Day was code J1100 (injection, dexamethasone sodium phosphate, 1 mg), 1,147 times for 91 patients. In total Gustavo H Day billed 7,090 services in 129 codes, and Medicare paid $256K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2026-05-18.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| J1100 Injection, dexamethasone sodium phosphate, 1 mg | Office | 1,147 | 91 | $0.07 | $84.36 |
| J0696 Injection, ceftriaxone sodium, per 250 mg | Office | 838 | 100 | $0.30 | $252 |
| 99214 Office E&M - Established | Office | 705 | 275 | $85.28 | $60K |
| 96372 Injection Administration | Office | 596 | 143 | $9.75 | $5,809 |
| 99213 Office E&M - Established | Office | 531 | 244 | $54.05 | $29K |
| 36415 Venipuncture Blood Collection | Office | 277 | 224 | $8.65 | $2,396 |
| 99490 Chronic, Principal, and Transitional Care Management | Office | 171 | 17 | $43.40 | $7,422 |
| 96127 Behavioral Health Services | Office | 154 | 51 | $3.20 | $492 |
| G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Office | 123 | 123 | $121.50 | $15K |
| J1885 Injection, ketorolac tromethamine, per 15 mg | Office | 115 | 44 | $0.39 | $44.64 |
| G0444 Annual depression screening, 5 to 15 minutes | Office | 112 | 112 | $17.76 | $1,989 |
| 99497 Care Management/Coordination | Office | 110 | 109 | $67.68 | $7,445 |
| J3420 Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg | Office | 108 | 43 | $0.85 | $91.28 |
| 95923 Electrical Nerve Conductivity | Office | 87 | 87 | $88.82 | $7,727 |
| 93880 Duplex Scan - Extracranial Arteries | Office | 83 | 83 | $133.01 | $11K |
By year: 2022 $444K for 14,172 services; 2023 $326K for 11,232 services; 2024 $256K for 7,090 services.
Lab tests billed to Medicare, 2024
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 36415 Venipuncture Blood Collection | 277 | 224 | $8.65 | $2,396 |
| 82962 Clinical Chemistry | 27 | 21 | $3.21 | $86.67 |
| 80053 Clinical Chemistry | 11 | 11 | $10.35 | $114 |
| 85025 Blood Count | 11 | 11 | $7.61 | $83.71 |
Medicare prescription drug claims, 2024
In 2024, the drug Gustavo H Day prescribed most often to Medicare patients was Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen), with 1,944 prescriptions and refills. In total Gustavo H Day wrote 34,251 Medicare prescriptions that cost $4.0M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 1,944 | 1,944 | 249 | $57K |
| Atorvastatin Calcium Generic | 1,756 | 5,027 | 566 | $12K |
| Losartan Potassium Generic | 1,361 | 3,794 | 437 | $10K |
| Alprazolam Generic | 1,033 | 1,039 | 168 | $5,226 |
| Gabapentin Generic | 860 | 1,489 | 241 | $18K |
| Hydralazine Hcl Generic | 804 | 1,601 | 245 | $6,427 |
| Levothyroxine Sodium Generic | 704 | 1,937 | 210 | $5,772 |
| Azithromycin Generic | 656 | 656 | 356 | $1,716 |
| Omeprazole Generic | 621 | 1,340 | 179 | $13K |
| Ozempic Semaglutide | 604 | 695 | 119 | $648K |
| Amlodipine Besylate Generic | 594 | 1,613 | 190 | $2,951 |
| Prednisone Generic | 555 | 563 | 275 | $1,433 |
| Metformin Hcl Generic | 485 | 1,409 | 150 | $2,352 |
| Methylprednisolone Generic | 475 | 476 | 289 | $3,742 |
| Bisoprolol Fumarate Generic | 471 | 1,128 | 154 | $12K |
Brand drugs: 4,233 claims; generic drugs: 29,765 claims; opioid claims: 2,365.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Gustavo H Day $5,181 ($5,181 in general payments such as food, travel and fees) from 38 companies. The largest payer was Novo Nordisk Inc with $512.
| Company | Payments | Amount |
|---|---|---|
| Novo Nordisk Inc NVO | 22 | $512 |
| AstraZeneca Pharmaceuticals LP AZN | 17 | $454 |
| Scilex Pharmaceuticals Inc. | 5 | $429 |
| Abbvie Inc. ABBV | 31 | $398 |
| Abbott Laboratories ABT | 8 | $353 |
| Amgen Inc. AMGN | 25 | $335 |
| Pfizer Inc. PFE | 11 | $276 |
| Otsuka America Pharmaceutical, Inc. 4578.T | 13 | $264 |
| GlaxoSmithKline, LLC. GSK | 14 | $259 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | 11 | $239 |
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.