Internal Medicine, Hematology & Oncology · Vallejo, CA
NPI
1053341784
Since 2006
Specialty
Internal Medicine, Hematology & Oncology
Code 207RH0003X
Group practices
1
Medicare group memberships
Hospitals
2
Hospital affiliations
100 Hospital Dr, Suite # 110
Vallejo, CA, 94589
Phone (707) 551-3300
Groups this clinician bills Medicare through
Medicare paid, 2024
$3.0M
179,200 services
Medicare patients, 2024
370
Average age 73
Drug cost, 2024
$6.2M
3,492 prescriptions
Company payments, 2025
$4,852
From 52 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Chainarong Limvarapuss was code J1439 (injection, ferric carboxymaltose, 1 mg), 18,750 times for 19 patients. In total Chainarong Limvarapuss billed 179,200 services in 164 codes, and Medicare paid $3.0M.
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2011-03-04.
| Code |
|---|
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| J1439 Injection, ferric carboxymaltose, 1 mg | Office | 18,750 | 19 | $0.87 | $16K |
| J9271 Injection, pembrolizumab, 1 mg | Office | 10,800 | 12 | $44.81 | $484K |
| Q0138 Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use) | Office | 10,200 | 13 | $0.28 | $2,886 |
| J0897 Injection, denosumab, 1 mg | Office | 8,402 | 48 | $20.42 | $172K |
| J1456 Injection, fosaprepitant (teva), not therapeutically equivalent to j1453, 1 mg | Office | 6,300 | 11 | $1.41 | $8,890 |
| J1642 Injection, heparin sodium, (heparin lock flush), per 10 units | Office | 5,201 | 27 | $0.01 | $66.36 |
| J0885 Injection, epoetin alfa, (for non-esrd use), 1000 units | Office | 3,250 | 14 | $6.40 | $21K |
| Q5106 Injection, epoetin alfa-epbx, biosimilar, (retacrit) (for non-esrd use), 1000 units | Office | 2,890 | 16 | $5.73 | $17K |
| J1626 Injection, granisetron hydrochloride, 100 mcg | Office | 2,660 | 57 | $0.26 | $682 |
| J3475 Injection, magnesium sulfate, per 500 mg | Office | 2,262 | 48 | $0.44 | $988 |
| 36415 Venipuncture Blood Collection | Office | 1,569 | 278 | $8.65 | $14K |
| 99214 Office E&M - Established | Office | 1,564 | 302 | $107.59 | $168K |
| 85025 Blood Count | Office | 1,507 | 272 | $7.60 | $11K |
| 96375 Injection Administration | Office | 1,495 | 101 | $14.89 | $22K |
| J3480 Injection, potassium chloride, per 2 meq | Office | 1,370 | 29 | $0.08 | $116 |
By year: 2022 $4.8M for 281,095 services; 2023 $4.7M for 266,612 services; 2024 $3.0M for 179,200 services.
Lab tests billed to Medicare, 2024
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 36415 Venipuncture Blood Collection | 1,569 | 278 | $8.65 | $14K |
| 85025 Blood Count | 1,507 | 272 | $7.60 | $11K |
| 80048 Clinical Chemistry | 752 | 222 | $8.27 | $6,220 |
| 83615 Clinical Chemistry | 699 | 224 | $5.90 | $4,123 |
| 80053 Clinical Chemistry | 545 | 210 | $10.33 | $5,632 |
| 83735 Clinical Chemistry | 450 | 81 | $6.57 | $2,956 |
| 82728 Clinical Chemistry | 444 | 194 | $13.36 | $5,932 |
| 82378 Clinical Chemistry | 340 | 109 | $18.58 | $6,317 |
| 80076 Clinical Chemistry | 329 | 182 | $7.97 | $2,621 |
| 86140 Clinical Chemistry | 326 | 148 | $5.05 | $1,647 |
Medicare prescription drug claims, 2024
In 2024, the drug Chainarong Limvarapuss prescribed most often to Medicare patients was Levothyroxine Sodium, with 161 prescriptions and refills. In total Chainarong Limvarapuss wrote 3,492 Medicare prescriptions that cost $6.2M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Levothyroxine Sodium Generic | 161 | 360 | 36 | $3,386 |
| Eliquis Apixaban | 126 | 232 | 28 | $135K |
| Letrozole Generic | 100 | 192 | 20 | $2,017 |
| Atorvastatin Calcium Generic | 99 | 247 | 29 | $539 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 99 | 99 | 19 | $2,032 |
| Gabapentin Generic | 87 | 117 | Under 11 | $1,456 |
| Hydrochlorothiazide Generic | 79 | 195 | 21 | $295 |
| Tamsulosin Hcl Generic | 69 | 114 | 14 | $658 |
| Metoprolol Tartrate Generic | 68 | 122 | 15 | $328 |
| Metformin Hcl Generic | 66 | 155 | 23 | $242 |
| Prednisone Generic | 63 | 90 | 20 | $260 |
| Losartan Potassium Generic | 60 | 158 | 15 | $809 |
| Amlodipine Besylate Generic | 59 | 127 | 18 | $253 |
| Warfarin Sodium Generic | 57 | 153 | 12 | $634 |
| Levofloxacin Generic | 54 | 54 | 43 | $466 |
Brand drugs: - claims; generic drugs: 2,673 claims; opioid claims: 238.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Chainarong Limvarapuss $4,852 ($4,852 in general payments such as food, travel and fees) from 52 companies. The largest payer was AstraZeneca Pharmaceuticals LP with $475.
| Company | Payments | Amount |
|---|---|---|
| AstraZeneca Pharmaceuticals LP AZN | 18 | $475 |
| Novartis Pharmaceuticals Corporation NVS | 16 | $360 |
| Karyopharm Therapeutics Inc. KPTI | 16 | $292 |
| Celgene Corporation BMY | 14 | $264 |
| Daiichi Sankyo Inc. 4568.T | 13 | $263 |
| Pfizer Inc. PFE | 13 | $250 |
| US Oncology Corporate, Inc. | 4 | $220 |
| GlaxoSmithKline, LLC. GSK | 9 | $202 |
| Merck Sharp & Dohme LLC MRK | 6 | $178 |
| E.R. Squibb & Sons, L.L.C. BMY | 9 | $162 |
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.