Internal Medicine · Pasadena, CA
NPI
1366627945
Since 2008
Specialty
Internal Medicine
Code 207R00000X
Group practices
1
Medicare group memberships
Hospitals
1
Hospital affiliations
1713 E Walnut St
Pasadena, CA, 91106
Phone (626) 696-3607
Groups this clinician bills Medicare through
Medicare paid, 2024
$517K
10,942 services
Medicare patients, 2024
737
Average age 75
Drug cost, 2024
$5.6M
46,817 prescriptions
Company payments, 2025
$3,266
From 32 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Gregor Paronian was code 99458 (e&m - miscellaneous), 2,606 times for 149 patients. In total Gregor Paronian billed 10,942 services in 35 codes, and Medicare paid $517K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2020-07-31.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99458 E&M - Miscellaneous | Office | 2,606 | 149 | $33.24 | $87K |
| 99214 Office E&M - Established | Office | 1,458 | 599 | $97.05 | $141K |
| 99457 E&M - Miscellaneous | Office | 1,450 | 161 | $40.98 | $59K |
| 99454 E&M - Miscellaneous | Office | 1,306 | 139 | $41.85 | $55K |
| 36415 Venipuncture Blood Collection | Office | 1,063 | 542 | $8.64 | $9,186 |
| 99439 Chronic, Principal, and Transitional Care Management | Office | 831 | 51 | $40.17 | $33K |
| 99213 Office E&M - Established | Office | 691 | 395 | $67.28 | $46K |
| 99490 Chronic, Principal, and Transitional Care Management | Office | 463 | 51 | $53.29 | $25K |
| 96372 Injection Administration | Office | 217 | 71 | $11.37 | $2,468 |
| J3420 Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg | Office | 146 | 48 | $0.87 | $128 |
| G0179 Physician or allowed practitioner re-certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians a | Office | 118 | 64 | $34.82 | $4,108 |
| G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and | Office | 101 | 73 | $43.10 | $4,353 |
| 99496 Chronic, Principal, and Transitional Care Management | Office | 88 | 68 | $236.07 | $21K |
| 99204 Office E&M - New | Office | 75 | 75 | $117.30 | $8,798 |
| 93000 Electrocardiogram | Office | 57 | 52 | $11.76 | $670 |
By year: 2022 $217K for 3,795 services; 2023 $433K for 8,557 services; 2024 $517K for 10,942 services.
Lab tests billed to Medicare, 2024
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 36415 Venipuncture Blood Collection | 1,063 | 542 | $8.64 | $9,186 |
Medicare prescription drug claims, 2024
In 2024, the drug Gregor Paronian prescribed most often to Medicare patients was Rosuvastatin Calcium, with 2,263 prescriptions and refills. In total Gregor Paronian wrote 46,817 Medicare prescriptions that cost $5.6M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Rosuvastatin Calcium Generic | 2,263 | 3,511 | 392 | $20K |
| Atorvastatin Calcium Generic | 1,415 | 2,301 | 254 | $8,412 |
| Levothyroxine Sodium Generic | 1,162 | 1,875 | 181 | $9,786 |
| Amlodipine Besylate Generic | 1,084 | 1,789 | 195 | $3,590 |
| Metformin Hcl Generic | 994 | 1,464 | 152 | $4,290 |
| Gabapentin Generic | 975 | 1,170 | 155 | $5,580 |
| Escitalopram Oxalate Generic | 814 | 1,075 | 118 | $4,989 |
| Furosemide Generic | 801 | 1,021 | 149 | $1,948 |
| Ibuprofen Generic | 769 | 815 | 137 | $4,089 |
| Azelastine Hcl Generic | 734 | 883 | 150 | $12K |
| Omeprazole Generic | 699 | 1,004 | 123 | $4,737 |
| Trazodone Hcl Generic | 689 | 851 | 126 | $2,259 |
| Tamsulosin Hcl Generic | 683 | 1,083 | 130 | $6,548 |
| Losartan Potassium Generic | 670 | 997 | 104 | $3,720 |
| Vascepa Icosapent Ethyl | 618 | 658 | 83 | $217K |
Brand drugs: 8,015 claims; generic drugs: 38,136 claims; opioid claims: 697.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Gregor Paronian $3,266 ($3,266 in general payments such as food, travel and fees) from 32 companies. The largest payer was AstraZeneca Pharmaceuticals LP with $537.
| Company | Payments | Amount |
|---|---|---|
| AstraZeneca Pharmaceuticals LP AZN | 17 | $537 |
| Abbvie Inc. ABBV | 23 | $446 |
| Amgen Inc. AMGN | 28 | $388 |
| Bayer Healthcare Pharmaceuticals Inc. BAYN.DE | 9 | $166 |
| Otsuka America Pharmaceutical, Inc. 4578.T | 9 | $165 |
| GlaxoSmithKline, LLC. GSK | 7 | $155 |
| Merck Sharp & Dohme LLC MRK | 5 | $126 |
| Novo Nordisk Inc NVO | 5 | $105 |
| ViiV Healthcare Company GSK | 3 | $94.39 |
| Exact Sciences Corporation EXAS | 3 | $91.35 |
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.