Internal Medicine, Nephrology · Creve Coeur, MO
NPI
1588820096
Since 2008
Specialty
Internal Medicine, Nephrology
Code 207RN0300X
Group practices
2
Medicare group memberships
Hospitals
5
Hospital affiliations
456 N New Ballas Rd Ste 348
Creve Coeur, MO, 63141
Phone (314) 548-0265
Groups this clinician bills Medicare through
Medicare paid, 2024
$160K
1,454 services
Medicare patients, 2024
581
Average age 74
Drug cost, 2024
$121K
934 prescriptions
Company payments, 2025
$45K
From 11 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Derek S Larson was code 99233 (hospital e&m - subsequent), 402 times for 142 patients. In total Derek S Larson billed 1,454 services in 19 codes, and Medicare paid $160K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2023-10-16.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99233 Hospital E&M - Subsequent | Facility | 402 | 142 | $88.39 | $36K |
| 99213 Office E&M - Established | Office | 240 | 221 | $58.98 | $14K |
| 90960 ESRD Related Services (not dialysis) | Office | 188 | 34 | $253.86 | $48K |
| 99214 Office E&M - Established | Office | 130 | 110 | $87.33 | $11K |
| 99232 Hospital E&M - Subsequent | Facility | 91 | 64 | $59.54 | $5,418 |
| 99223 Hospital E&M - Initial | Facility | 78 | 73 | $130.13 | $10K |
| G2211 Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's | Office | 73 | 73 | $12.37 | $903 |
| 90935 Hemodialysis | Facility | 58 | 31 | $52.69 | $3,056 |
| 90966 ESRD Related Services (not dialysis) | Office | 57 | 12 | $213.04 | $12K |
| 90961 ESRD Related Services (not dialysis) | Office | 44 | 25 | $211.27 | $9,296 |
| 99222 Hospital E&M - Initial | Facility | 25 | 24 | $99.55 | $2,489 |
| 99212 Office E&M - Established | Office | 23 | 23 | $35.06 | $806 |
| 99215 Office E&M - Established | Office | 15 | 11 | $129.11 | $1,937 |
By year: 2022 $187K for 1,449 services; 2023 $188K for 1,540 services; 2024 $160K for 1,454 services.
Medicare prescription drug claims, 2024
In 2024, the drug Derek S Larson prescribed most often to Medicare patients was Amlodipine Besylate, with 105 prescriptions and refills. In total Derek S Larson wrote 934 Medicare prescriptions that cost $121K.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Amlodipine Besylate Generic | 105 | 225 | 35 | $608 |
| Farxiga Dapagliflozin Propanediol | 90 | 112 | 24 | $62K |
| Losartan Potassium Generic | 70 | 160 | 22 | $373 |
| Lisinopril Generic | 54 | 88 | 16 | $231 |
| Torsemide Generic | 48 | 94 | 15 | $1,125 |
| Sodium Bicarbonate Generic | 36 | 36 | Under 11 | $3,097 |
| Calcitriol Generic | 35 | 78 | 12 | $614 |
| Nifedipine Er Nifedipine | 28 | 40 | Under 11 | $721 |
| Allopurinol Generic | 27 | 47 | Under 11 | $167 |
| Gabapentin Generic | 26 | 28 | Under 11 | $121 |
| Sevelamer Carbonate Generic | 25 | 43 | Under 11 | $5,053 |
| Potassium Chloride Generic | 24 | 44 | Under 11 | $488 |
| Labetalol Hcl Generic | 22 | 24 | Under 11 | $747 |
| Furosemide Generic | 20 | 32 | Under 11 | $48.76 |
| Potassium Citrate Er Potassium Citrate | 20 | 50 | Under 11 | $2,568 |
Brand drugs: 149 claims; generic drugs: 785 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Derek S Larson $45K ($45K in general payments such as food, travel and fees) from 11 companies. The largest payer was Travere Therapeutics, Inc. with $34K.
| Company | Payments | Amount |
|---|---|---|
| Travere Therapeutics, Inc. TVTX | 50 | $34K |
| AstraZeneca Pharmaceuticals LP AZN | 13 | $7,465 |
| Fresenius USA Marketing, Inc. | 6 | $3,798 |
| Alexion Pharmaceuticals, Inc. AZN | 1 | $175 |
| Otsuka America Pharmaceutical, Inc. 4578.T | 6 | $121 |
| Calliditas Therapeutics US Inc. | 2 | $59.22 |
| Vifor Pharma, Inc. | 2 | $38.27 |
| Amgen Inc. AMGN | 1 | $28.4 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | 1 | $20.9 |
| Aurinia Pharma U.S., Inc. AUPH | 1 | $14.49 |
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.