Internal Medicine, Hematology & Oncology · Los Angeles, CA
NPI
1801067897
Since 2008
Specialty
Internal Medicine, Hematology & Oncology
Code 207RH0003X
Group practices
1
Medicare group memberships
Hospitals
2
Hospital affiliations
10945 Le Conte Ave, UCLA, Division of Hematology-Oncology, Pvub Suite 2333
Los Angeles, CA, 90095
Phone (310) 829-5471
Groups this clinician bills Medicare through
Medicare paid, 2024
$5.0M
131,355 services
Medicare patients, 2024
564
Average age 74
Drug cost, 2024
$2.4M
567 prescriptions
Company payments, 2025
$7,768
From 7 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Bartosz Chmielowski was code J9299 (injection, nivolumab, 1 mg), 36,680 times for 16 patients. In total Bartosz Chmielowski billed 131,355 services in 143 codes, and Medicare paid $5.0M.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2010-02-09.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| J9299 Injection, nivolumab, 1 mg | Office | 36,680 | 16 | $24.57 | $901K |
| J9271 Injection, pembrolizumab, 1 mg | Office | 27,200 | 29 | $44.67 | $1.2M |
| J1453 Injection, fosaprepitant, 1 mg | Office | 2,850 | 12 | $0.11 | $324 |
| J2405 Injection, ondansetron hydrochloride, per 1 mg | Office | 728 | 21 | $0.07 | $53.39 |
| 99214 Office E&M - Established | Office | 646 | 230 | $106.04 | $68K |
| J1100 Injection, dexamethasone sodium phosphate, 1 mg | Office | 447 | 21 | $0.09 | $40.27 |
| 96413 Chemotherapy Administration | Office | 421 | 101 | $106.00 | $45K |
| J7050 Infusion, normal saline solution, 250 cc | Office | 364 | 90 | $0.52 | $188 |
| J2469 Injection, palonosetron hcl, 25 mcg | Office | 320 | 18 | $0.74 | $237 |
| 99215 Office E&M - Established | Office | 243 | 125 | $150.05 | $36K |
| 85025 Blood Count | Office | 209 | 117 | $7.61 | $1,590 |
| 96367 Intravenous Infusion, Hydration | Office | 136 | 46 | $25.58 | $3,479 |
| 96375 Injection Administration | Office | 128 | 37 | $13.60 | $1,741 |
| 96361 Intravenous Infusion, Hydration | Office | 102 | 34 | $11.04 | $1,126 |
| J3475 Injection, magnesium sulfate, per 500 mg | Office | 96 | 13 | $0.43 | $41.22 |
By year: 2022 $3.7M for 88,035 services; 2023 $4.6M for 116,331 services; 2024 $5.0M for 131,355 services.
Lab tests billed to Medicare, 2024
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 85025 Blood Count | 209 | 117 | $7.61 | $1,590 |
| 80053 Clinical Chemistry | 60 | 31 | $10.35 | $621 |
| 36415 Venipuncture Blood Collection | 48 | 30 | $8.65 | $415 |
Medicare prescription drug claims, 2024
In 2024, the drug Bartosz Chmielowski prescribed most often to Medicare patients was Prednisone, with 53 prescriptions and refills. In total Bartosz Chmielowski wrote 567 Medicare prescriptions that cost $2.4M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Prednisone Generic | 53 | 59 | 19 | $325 |
| Mektovi Binimetinib | 36 | 36 | Under 11 | $484K |
| Braftovi Encorafenib | 36 | 36 | Under 11 | $539K |
| Levothyroxine Sodium Generic | 24 | 66 | Under 11 | $239 |
| Mekinist Trametinib Dimethyl Sulfoxide | 21 | 21 | Under 11 | $274K |
| Tafinlar Dabrafenib Mesylate | 21 | 21 | Under 11 | $278K |
| Ondansetron Hcl Generic | 21 | 21 | Under 11 | $151 |
| Imatinib Mesylate Generic | 15 | 23 | Under 11 | $8,829 |
| Atovaquone Generic | 14 | 14 | Under 11 | $3,296 |
| Eliquis Apixaban | 13 | 13 | Under 11 | $6,986 |
| Hydrocortisone Generic | 12 | 20 | Under 11 | $404 |
| Trazodone Hcl Generic | 12 | 12 | Under 11 | $64.8 |
| Erlotinib Hcl Generic | 12 | 12 | Under 11 | $6,391 |
| Tasigna Nilotinib Hcl | 11 | 11 | Under 11 | $217K |
| Gleevec Imatinib Mesylate | 11 | 11 | Under 11 | $110K |
Brand drugs: - claims; generic drugs: 378 claims; opioid claims: 19.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Bartosz Chmielowski $7,768 ($7,768 in general payments such as food, travel and fees) from 7 companies. The largest payer was Immunocore Limited with $7,493.
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.