Doctor profile · Federal record
Dr. John Karesh, MD
Internal Medicine Physician (CMS: Internal Medicine) · Oswego, IL
- NPI 1932127917
- Accepts Medicare
- 49 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
80 Templeton Dr
Oswego, IL 605437000
(630) 554-3456 - Mailing address
-
2357 Sequoia Dr
Aurora, IL 605066222
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- November 18, 2021
- Year of graduation
- 1977 — 49 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Illinois #036-057128
- Medicaid
- IL #036057128
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1932127917. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
3,838
Distinct HCPCS
10
Medicare allowed
$180,964
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
85610 |
Blood test, clotting time | 786 | 74 | $4 | |
93793 |
Anticoagulant management of patient taking warfarin | 768 | 67 | $11 | |
36415 |
Insertion of needle into vein for collection of blood sample | 624 | 370 | $8 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 427 | 276 | $122 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 370 | 278 | $86 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 337 | 337 | $123 | |
96372 |
Injection of drug or substance under skin or into muscle | 94 | 24 | $13 | |
93000 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 73 | 63 | $14 | |
G0008 |
Administration of influenza virus vaccine | 67 | 64 | $32 | |
90662 |
Influenza vaccine split virus, preservative free | 66 | 64 | $72 |
In context: peer comparison
Among 4 peers in Oswego Internal Medicine Physician, average services per provider: 220. This provider delivers 17× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
4,249
Patients
1,210
Total drug cost
$49,722
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 527 | 152 | $7,240 |
| Lisinopril | Generic | 450 | 124 | $4,177 |
| Levothyroxine Sodium | Generic | 370 | 85 | $5,194 |
| Amlodipine Besylate | Generic | 361 | 99 | $2,701 |
| Losartan Potassium | Generic | 332 | 94 | $4,081 |
| Metformin Hcl | Generic | 329 | 99 | $2,691 |
| Metoprolol Succinate | Generic | 257 | 73 | $3,909 |
| Pantoprazole Sodium | Generic | 223 | 72 | $4,420 |
| Omeprazole | Generic | 222 | 66 | $2,634 |
| Furosemide | Generic | 213 | 60 | $958 |
Hospital affiliations
Frequently asked questions
What is Dr. John Karesh's medical specialty?
Dr. John Karesh practices Internal Medicine Physician in Oswego, IL.
Where does Dr. John Karesh practice?
Dr. John Karesh practices at 80 Templeton Dr, Oswego, IL 605437000. Office phone: 6305543456.
What is Dr. John Karesh's NPI?
Dr. John Karesh's National Provider Identifier (NPI) is 1932127917, issued by NPPES.
Does Dr. John Karesh accept Medicare assignment?
Yes. Dr. John Karesh accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Karesh commonly perform?
Top Medicare-reported procedures in 2023: Blood test, clotting time (HCPCS 85610); Anticoagulant management of patient taking warfarin (HCPCS 93793); Insertion of needle into vein for collection of blood sample (HCPCS 36415). Source: CMS Medicare Physician & Other Practitioners file.