Internal Medicine, Medical Oncology · Saint Louis, MO
NPI
1720492192
Since 2014
Specialty
Internal Medicine, Medical Oncology
Code 207RX0202X
Group practices
2
Medicare group memberships
Hospitals
5
Hospital affiliations
10 Barnes West Dr, Div Im Medical Oncology, Mob #2
Saint Louis, MO, 63141
Phone (800) 647-2098
Groups this clinician bills Medicare through
Medicare paid, 2024
$350K
27,594 services
Medicare patients, 2024
250
Average age 72
Drug cost, 2024
$644K
1,386 prescriptions
Company payments, 2025
$137
From 5 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Patrick Grierson was code J1453 (injection, fosaprepitant, 1 mg), 3,750 times for 17 patients. In total Patrick Grierson billed 27,594 services in 96 codes, and Medicare paid $350K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2025-04-17.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| J1453 Injection, fosaprepitant, 1 mg | Office | 3,750 | 17 | $0.10 | $384 |
| J1100 Injection, dexamethasone sodium phosphate, 1 mg | Office | 590 | 34 | $0.09 | $52.71 |
| J2469 Injection, palonosetron hcl, 25 mcg | Office | 350 | 23 | $0.71 | $250 |
| J0640 Injection, leucovorin calcium, per 50 mg | Office | 286 | 13 | $3.49 | $998 |
| J9190 Injection, fluorouracil, 500 mg | Office | 229 | 17 | $2.23 | $511 |
| 99214 Office E&M - Established | Office | 225 | 95 | $96.19 | $22K |
| J1626 Injection, granisetron hydrochloride, 100 mcg | Office | 180 | 11 | $0.26 | $46.21 |
| 99213 Office E&M - Established | Office | 109 | 59 | $65.92 | $7,185 |
| 96413 Chemotherapy Administration | Office | 91 | 56 | $87.68 | $7,979 |
| 96367 Intravenous Infusion, Hydration | Office | 81 | 33 | $19.39 | $1,570 |
| 96375 Injection Administration | Office | 77 | 37 | $11.24 | $865 |
| 36415 Venipuncture Blood Collection | Office | 43 | 21 | $8.65 | $372 |
| 96372 Injection Administration | Office | 28 | 22 | $10.48 | $293 |
| 99222 Hospital E&M - Initial | Facility | 27 | 27 | $100.12 | $2,703 |
| 96415 Chemotherapy Administration | Office | 26 | 15 | $19.98 | $519 |
By year: 2022 $1.9M for 110,380 services; 2023 $996K for 72,838 services; 2024 $350K for 27,594 services.
Lab tests billed to Medicare, 2024
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 36415 Venipuncture Blood Collection | 43 | 21 | $8.65 | $372 |
Medicare prescription drug claims, 2024
In 2024, the drug Patrick Grierson prescribed most often to Medicare patients was Prochlorperazine Maleate, with 139 prescriptions and refills. In total Patrick Grierson wrote 1,386 Medicare prescriptions that cost $644K.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Prochlorperazine Maleate Generic | 139 | 139 | 81 | $4,758 |
| Dexamethasone Generic | 134 | 159 | 62 | $1,542 |
| Ondansetron Hcl Generic | 110 | 110 | 70 | $7,969 |
| Gabapentin Generic | 84 | 98 | 16 | $1,574 |
| Loperamide Loperamide Hcl | 67 | 67 | 36 | $939 |
| Eliquis Apixaban | 62 | 65 | 14 | $37K |
| Oxycodone Hcl Generic | 60 | 60 | 31 | $1,161 |
| Potassium Chloride Generic | 51 | 53 | 18 | $717 |
| Lidocaine-Prilocaine Lidocaine/Prilocaine | 42 | 44 | 33 | $611 |
| Prednisone Generic | 38 | 39 | 14 | $177 |
| Famotidine Generic | 34 | 51 | Under 11 | $1,391 |
| Zarxio Filgrastim-Sndz | 33 | 33 | Under 11 | $44K |
| Creon Lipase/Protease/Amylase | 29 | 40 | Under 11 | $82K |
| Duloxetine Hcl Generic | 28 | 36 | Under 11 | $417 |
| Omeprazole Generic | 26 | 54 | Under 11 | $263 |
Brand drugs: - claims; generic drugs: 1,193 claims; opioid claims: 117.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Patrick Grierson $137 ($137 in general payments such as food, travel and fees) from 5 companies. The largest payer was Exelixis Inc. with $121.
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.