Internal Medicine, Cardiovascular Disease · Pasadena, CA
NPI
1477518454
Since 2006
Specialty
Internal Medicine, Cardiovascular Disease
Code 207RC0000X
Group practices
1
Medicare group memberships
Hospitals
4
Hospital affiliations
55 E California Blvd, 3rd Floor
Pasadena, CA, 91105
Phone (626) 793-1227
Groups this clinician bills Medicare through
Medicare paid, 2024
$986K
24,764 services
Medicare patients, 2024
2,229
Average age 78
Drug cost, 2024
$2.3M
8,413 prescriptions
Company payments, 2025
$2,425
From 21 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Gregory M Giesler was code J0153 (injection, adenosine, 1 mg (not to be used to report any adenosine phosphate compounds)), 14,040 times for 155 patients. In total Gregory M Giesler billed 24,764 services in 70 codes, and Medicare paid $986K.
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2011-04-12.
| Code | Setting | Services | Patients | Paid per service | Medicare paid |
|---|
| J0153 Injection, adenosine, 1 mg (not to be used to report any adenosine phosphate compounds) | Office | 14,040 | 155 | $0.40 | $5,652 |
| 99457 E&M - Miscellaneous | Office | 2,074 | 311 | $43.15 | $89K |
| 99454 E&M - Miscellaneous | Office | 1,951 | 335 | $42.93 | $84K |
| 99214 Office E&M - Established | Office | 1,635 | 874 | $107.02 | $175K |
| 93306 Echocardiography (TTE/TEE) | Office | 672 | 645 | $162.23 | $109K |
| 99233 Hospital E&M - Subsequent | Facility | 636 | 200 | $102.33 | $65K |
| 93000 Electrocardiogram | Office | 433 | 392 | $11.97 | $5,183 |
| 93010 Electrocardiogram | Facility | 356 | 310 | $7.09 | $2,523 |
| 93880 Duplex Scan - Extracranial Arteries | Office | 318 | 313 | $174.74 | $56K |
| 78452 Myocardial Perfusion Scan | Office | 283 | 282 | $398.70 | $113K |
| A9502 Technetium tc-99m tetrofosmin, diagnostic, per study dose | Office | 283 | 282 | $76.26 | $22K |
| 96374 Injection Administration | Office | 279 | 278 | $35.15 | $9,807 |
| 93015 Electrocardiogram | Office | 275 | 274 | $57.92 | $16K |
| 99215 Office E&M - Established | Office | 160 | 114 | $160.69 | $26K |
| 99213 Office E&M - Established | Office | 135 | 127 | $65.61 | $8,857 |
By year: 2022 $908K for 20,874 services; 2023 $930K for 21,000 services; 2024 $986K for 24,764 services.
Medicare prescription drug claims, 2024
In 2024, the drug Gregory M Giesler prescribed most often to Medicare patients was Olmesartan Medoxomil, with 916 prescriptions and refills. In total Gregory M Giesler wrote 8,413 Medicare prescriptions that cost $2.3M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Olmesartan Medoxomil Generic | 916 | 2,063 | 229 | $24K |
| Atorvastatin Calcium Generic | 908 | 2,473 | 242 | $8,586 |
| Amlodipine Besylate Generic | 729 | 1,685 | 200 | $4,513 |
| Eliquis Apixaban | 634 | 1,047 | 120 | $596K |
| Metoprolol Succinate Generic | 631 | 1,517 | 166 | $9,745 |
| Carvedilol Generic | 594 | 1,455 | 146 | $6,324 |
| Rosuvastatin Calcium Generic | 383 | 992 | 103 | $5,587 |
| Hydralazine Hcl Generic | 274 | 593 | 71 | $4,682 |
| Repatha Sureclick Evolocumab | 222 | 329 | 35 | $181K |
| Irbesartan Generic | 187 | 451 | 43 | $4,186 |
| Entresto Sacubitril/Valsartan | 179 | 251 | 29 | $159K |
| Clopidogrel Clopidogrel Bisulfate | 177 | 414 | 60 | $1,919 |
| Losartan Potassium Generic | 176 | 426 | 53 | $1,640 |
| Furosemide Generic | 169 | 352 | 55 | $1,185 |
| Olmesartan-Hydrochlorothiazide Olmesartan/Hydrochlorothiazide | 164 | 382 | 46 | $7,574 |
Brand drugs: 1,622 claims; generic drugs: 6,791 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Gregory M Giesler $2,425 ($2,425 in general payments such as food, travel and fees) from 21 companies. The largest payer was BridgeBio Pharma, Inc. with $365.
| Company | Payments | Amount |
|---|---|---|
| BridgeBio Pharma, Inc. BBIO | 8 | $365 |
| Merck Sharp & Dohme LLC MRK | 11 | $312 |
| Pfizer Inc. PFE | 16 | $304 |
| AstraZeneca Pharmaceuticals LP AZN | 12 | $241 |
| Novartis Pharmaceuticals Corporation NVS | 11 | $219 |
| Abbott Laboratories ABT | 6 | $194 |
| Amgen Inc. AMGN | 6 | $126 |
| Alnylam Pharmaceuticals Inc. ALNY | 3 | $100 |
| Kestra Medical Technology Services, Inc. | 3 | $85.63 |
| Cardiva Medical, Inc. | 4 | $77.73 |
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.