Hematology/Oncology · San Francisco, CA
NPI
1013086420
Since 2006
Specialty
Hematology/Oncology
Code 174400000X
Group practices
2
Medicare group memberships
Hospitals
5
Hospital affiliations
2100 Webster Street Suite 225
San Francisco, CA, 94115
Phone (415) 923-3012
Groups this clinician bills Medicare through
Medicare paid, 2024
$2.4M
143,015 services
Medicare patients, 2024
584
Average age 77
Drug cost, 2024
$16.4M
2,751 prescriptions
Company payments, 2025
$82K
From 41 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Ari D Baron was code J0881 (injection, darbepoetin alfa, 1 microgram (non-esrd use)), 20,228 times for 28 patients. In total Ari D Baron billed 143,015 services in 109 codes, and Medicare paid $2.4M.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2007-07-08.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| J0881 Injection, darbepoetin alfa, 1 microgram (non-esrd use) | Office | 20,228 | 28 | $2.33 | $47K |
| Q0138 Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use) | Office | 19,380 | 22 | $0.28 | $5,341 |
| J9263 Injection, oxaliplatin, 0.5 mg | Office | 9,501 | 12 | $0.06 | $533 |
| J0897 Injection, denosumab, 1 mg | Office | 9,163 | 50 | $20.50 | $188K |
| J9271 Injection, pembrolizumab, 1 mg | Office | 8,815 | 15 | $44.57 | $393K |
| J9299 Injection, nivolumab, 1 mg | Office | 7,902 | 11 | $24.47 | $193K |
| J1100 Injection, dexamethasone sodium phosphate, 1 mg | Office | 2,835 | 55 | $0.09 | $256 |
| J2469 Injection, palonosetron hcl, 25 mcg | Office | 2,098 | 54 | $0.72 | $1,506 |
| J0640 Injection, leucovorin calcium, per 50 mg | Office | 1,181 | 19 | $3.38 | $3,992 |
| J9190 Injection, fluorouracil, 500 mg | Office | 1,036 | 23 | $2.32 | $2,400 |
| 85025 Blood Count | Office | 975 | 200 | $7.56 | $7,374 |
| 99214 Office E&M - Established | Office | 917 | 434 | $111.05 | $102K |
| 96413 Chemotherapy Administration | Office | 456 | 85 | $135.77 | $62K |
| 96372 Injection Administration | Office | 454 | 109 | $13.25 | $6,015 |
| Q5111 Injection, pegfilgrastim-cbqv (udenyca), biosimilar, 0.5 mg | Office | 425 | 19 | $109.68 | $47K |
By year: 2022 $2.5M for 139,403 services; 2023 $2.4M for 132,238 services; 2024 $2.4M for 143,015 services.
Lab tests billed to Medicare, 2024
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 85025 Blood Count | 975 | 200 | $7.56 | $7,374 |
Medicare prescription drug claims, 2024
In 2024, the drug Ari D Baron prescribed most often to Medicare patients was Nubeqa (Darolutamide), with 398 prescriptions and refills. In total Ari D Baron wrote 2,751 Medicare prescriptions that cost $16.4M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Nubeqa Darolutamide | 398 | 399 | 50 | $5.3M |
| Eliquis Apixaban | 164 | 191 | 28 | $110K |
| Prednisone Generic | 138 | 148 | 19 | $655 |
| Lupron Depot Leuprolide Acetate | 133 | 382 | 45 | $810K |
| Abiraterone Acetate Generic | 113 | 117 | 14 | $185K |
| Xgeva Denosumab | 110 | 110 | 16 | $349K |
| Hydroxyurea Generic | 102 | 167 | 18 | $1,836 |
| Acyclovir Generic | 78 | 84 | 13 | $1,355 |
| Keytruda Pembrolizumab | 69 | 69 | 11 | $774K |
| Aranesp Darbepoetin Alfa In Polysorbat | 68 | 68 | 14 | $154K |
| Xtandi Enzalutamide | 54 | 54 | Under 11 | $600K |
| Neulasta Onpro Pegfilgrastim | 53 | 53 | Under 11 | $329K |
| Nplate Romiplostim | 51 | 51 | Under 11 | $143K |
| Leucovorin Calcium Generic | 43 | 43 | Under 11 | $5,600 |
| Palonosetron Hcl Generic | 41 | 41 | Under 11 | $1,237 |
Brand drugs: 1,745 claims; generic drugs: 1,006 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Ari D Baron $82K ($82K in general payments such as food, travel and fees) from 41 companies. The largest payer was E.R. Squibb & Sons, L.L.C. with $47K.
| Company | Payments | Amount |
|---|---|---|
| E.R. Squibb & Sons, L.L.C. BMY | 30 | $47K |
| Astellas Pharma US Inc 4503.T | 9 | $11K |
| Abbvie Inc. ABBV | 15 | $10K |
| Incyte Corporation INCY | 12 | $6,993 |
| Bayer Healthcare Pharmaceuticals Inc. BAYN.DE | 6 | $5,492 |
| Amgen Inc. AMGN | 4 | $199 |
| Celgene Corporation BMY | 6 | $149 |
| Merck Sharp & Dohme LLC MRK | 3 | $99.78 |
| Coherus Oncology, Inc. CHRS | 2 | $73.81 |
| Gilead Sciences, Inc. GILD | 3 | $70.88 |
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.