Internal Medicine, Nephrology · Chicago, IL
NPI
1508801093
Since 2006
Specialty
Internal Medicine, Nephrology
Code 207RN0300X
Group practices
1
Medicare group memberships
Hospitals
4
Hospital affiliations
675 N Saint Clair St, Galter 17-200
Chicago, IL, 60611
Phone (312) 695-8900
Groups this clinician bills Medicare through
Medicare paid, 2024
$55K
866 services
Medicare patients, 2024
252
Average age 62
Drug cost, 2024
$170K
1,334 prescriptions
Company payments, 2025
$11K
From 6 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by John Friedewald was code 99232 (hospital e&m - subsequent), 337 times for 96 patients. In total John Friedewald billed 866 services in 18 codes, and Medicare paid $55K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2009-07-06.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99232 Hospital E&M - Subsequent | Facility | 337 | 96 | $65.68 | $22K |
| 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 | Facility | 159 | 121 | $13.62 | $2,165 |
| 99214 Office E&M - Established | Facility | 145 | 113 | $78.30 | $11K |
| 99222 Hospital E&M - Initial | Facility | 50 | 46 | $112.90 | $5,645 |
| 90935 Hemodialysis | Facility | 32 | 17 | $60.09 | $1,923 |
| 99215 Office E&M - Established | Facility | 24 | 22 | $118.67 | $2,848 |
| 99233 Hospital E&M - Subsequent | Facility | 22 | 15 | $101.55 | $2,234 |
By year: 2022 $49K for 731 services; 2023 $32K for 456 services; 2024 $55K for 866 services.
Lab tests billed to Medicare, 2023
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 36415 Venipuncture Blood Collection | 56 | 17 | $7.25 | $406 |
Medicare prescription drug claims, 2024
In 2024, the drug John Friedewald prescribed most often to Medicare patients was Sulfamethoxazole-Trimethoprim (Sulfamethoxazole/Trimethoprim), with 447 prescriptions and refills. In total John Friedewald wrote 1,334 Medicare prescriptions that cost $170K.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 447 | 1,014 | 118 | $2,713 |
| Prednisone Generic | 157 | 290 | 38 | $1,168 |
| Carvedilol Generic | 72 | 176 | 25 | $601 |
| Amlodipine Besylate Generic | 59 | 132 | 22 | $376 |
| Tacrolimus Generic | 58 | 109 | 14 | $9,792 |
| Famotidine Generic | 55 | 123 | 17 | $688 |
| Nifedipine Er Nifedipine | 35 | 98 | 16 | $1,928 |
| Losartan Potassium Generic | 30 | 69 | Under 11 | $361 |
| Mycophenolate Mofetil Generic | 29 | 51 | Under 11 | $9,657 |
| Valganciclovir Hcl Generic | 27 | 34 | 12 | $12K |
| Envarsus Xr Tacrolimus | 26 | 30 | Under 11 | $44K |
| Atorvastatin Calcium Generic | 25 | 69 | 11 | $232 |
| Cinacalcet Hcl Generic | 19 | 34 | Under 11 | $2,266 |
| Cellcept Mycophenolate Mofetil | 18 | 24 | Under 11 | $29K |
| Entecavir Generic | 16 | 22 | Under 11 | $3,196 |
Brand drugs: - claims; generic drugs: 1,257 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid John Friedewald $11K ($11K in general payments such as food, travel and fees) from 6 companies. The largest payer was Vertex Pharmaceuticals Incorporated with $5,081.
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.