Internal Medicine, Pulmonary Disease · San Antonio, TX
NPI
1821016023
Since 2006
Specialty
Internal Medicine, Pulmonary Disease
Code 207RP1001X
Group practices
3
Medicare group memberships
Hospitals
3
Hospital affiliations
115 Gallery Cir, 102
San Antonio, TX, 78258
Phone (210) 494-4220
Groups this clinician bills Medicare through
Medicare paid, 2024
$286K
4,699 services
Medicare patients, 2024
1,124
Average age 76
Drug cost, 2024
$2.1M
4,456 prescriptions
Company payments, 2025
$107K
From 27 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by David A Marks was code 99214 (office e&m - established), 726 times for 474 patients. In total David A Marks billed 4,699 services in 72 codes, and Medicare paid $286K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2026-05-14.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99214 Office E&M - Established | Office | 726 | 474 | $89.46 | $65K |
| 99448 E&M - Miscellaneous | Office | 641 | 262 | $39.69 | $25K |
| 99349 Home E&M - New and Established | Office | 479 | 218 | $91.80 | $44K |
| 94729 Pulmonary Function Testing | Office | 395 | 377 | $38.58 | $15K |
| 94726 Pulmonary Function Testing | Office | 393 | 373 | $38.32 | $15K |
| 99449 E&M - Miscellaneous | Office | 318 | 169 | $52.51 | $17K |
| 94010 Pulmonary Function Testing | Office | 313 | 297 | $19.21 | $6,013 |
| 99348 Home E&M - New and Established | Office | 195 | 131 | $50.12 | $9,773 |
| 99204 Office E&M - New | Office | 176 | 176 | $117.23 | $21K |
| 81002 Clinical Chemistry | Office | 103 | 93 | $3.41 | $351 |
| 36415 Venipuncture Blood Collection | Office | 101 | 94 | $8.65 | $874 |
| 99347 Home E&M - New and Established | Office | 97 | 58 | $31.22 | $3,029 |
| 99344 Home E&M - New and Established | Office | 94 | 94 | $104.68 | $9,840 |
| 94060 Pulmonary Function Testing | Office | 90 | 89 | $26.51 | $2,386 |
| 99291 Critical Care E&M | Facility | 83 | 43 | $161.85 | $13K |
By year: 2022 $449K for 5,942 services; 2023 $368K for 5,215 services; 2024 $286K for 4,699 services.
Lab tests billed to Medicare, 2024
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 81002 Clinical Chemistry | 103 | 93 | $3.41 | $351 |
| 36415 Venipuncture Blood Collection | 101 | 94 | $8.65 | $874 |
Medicare prescription drug claims, 2024
In 2024, the drug David A Marks prescribed most often to Medicare patients was Trelegy Ellipta (Fluticasone/Umeclidin/Vilanter), with 338 prescriptions and refills. In total David A Marks wrote 4,456 Medicare prescriptions that cost $2.1M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 338 | 504 | 84 | $318K |
| Montelukast Sodium Generic | 254 | 540 | 82 | $2,934 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 205 | 264 | 89 | $6,383 |
| Prednisone Generic | 156 | 188 | 74 | $463 |
| Breztri Aerosphere Budesonide/Glycopyr/Formoterol | 142 | 247 | 41 | $149K |
| Azithromycin Generic | 134 | 188 | 93 | $1,110 |
| Breo Ellipta Fluticasone/Vilanterol | 84 | 122 | 19 | $47K |
| Trazodone Hcl Generic | 82 | 105 | 24 | $359 |
| Atorvastatin Calcium Generic | 80 | 132 | 25 | $631 |
| Sertraline Hcl Generic | 69 | 94 | 16 | $659 |
| Omeprazole Generic | 67 | 89 | 14 | $368 |
| Ciprofloxacin Hcl Generic | 64 | 68 | 39 | $338 |
| Levothyroxine Sodium Generic | 62 | 119 | 23 | $733 |
| Alprazolam Generic | 61 | 61 | Under 11 | $149 |
| Methylprednisolone Generic | 60 | 60 | 55 | $411 |
Brand drugs: 1,284 claims; generic drugs: 3,148 claims; opioid claims: 77.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid David A Marks $107K ($107K in general payments such as food, travel and fees) from 27 companies. The largest payer was AstraZeneca Pharmaceuticals LP with $104K.
| Company | Payments | Amount |
|---|---|---|
| AstraZeneca Pharmaceuticals LP AZN | 101 | $104K |
| Inspire Medical Systems, Inc. INSP | 39 | $1,630 |
| GlaxoSmithKline, LLC. GSK | 18 | $277 |
| Regeneron Healthcare Solutions, Inc. REGN | 3 | $173 |
| Verona Pharma, Inc. VRNA | 1 | $125 |
| Intuitive Surgical, Inc. ISRG | 1 | $118 |
| Axsome Therapeutics, Inc. AXSM | 5 | $108 |
| Harmony Biosciences LLC HRMY | 5 | $103 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | 4 | $87.34 |
| Phadia US Inc. | 3 | $68.3 |
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.