Doctor profile · Federal record
Dr. John Karagiannis, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Elkhart, IN
- NPI 1386647170
- Accepts Medicare
- MIPS 78.4 / 100 · 2023
- 39 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
303 S Nappanee St
Elkhart, IN 465142066
(574) 296-3341
fax (574) 296-3223 - Mailing address
-
Po Box 2968
Elkhart, IN 465152968
Credentials & registration
- NPI registered
- May 2005 — 21 yrs on file
- Profile last updated
- August 16, 2010
- Year of graduation
- 1987 — 39 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Indiana #01041123A
- Medicaid
- IN #100114240A
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1386647170. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
4,654
Distinct HCPCS
10
Medicare allowed
$134,742
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
Q9967 |
Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml | 1,600 | 19 | $0 | |
A9585 |
Injection, gadobutrol, 0.1 ml | 1,250 | 16 | $0 | |
93005 |
Routine electrocardiogram (ecg) using at least 12 leads with tracing | 307 | 303 | $6 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 237 | 205 | $120 | |
36415 |
Insertion of needle into vein for collection of blood sample | 192 | 137 | $8 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 126 | 119 | $91 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 121 | 119 | $235 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 95 | 94 | $123 | |
85025 |
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 78 | 67 | $8 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 75 | 75 | $170 |
In context: peer comparison
Among 2 peers in this city , average services per provider: 104. This provider delivers 45× the peer median.Open Payments
Industry payments received
All-time total
$402
Transactions
21
Manufacturers
8
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| ABBVIE INC. | 11 | $192.54 | |
| AIMMUNE THERAPEUTICS, INC. | 2 | $50.31 | |
| Takeda Pharmaceuticals U.S.A., Inc. | 2 | $39.81 | |
| Janssen Biotech, Inc. | 2 | $36.04 | |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | 1 | $24.67 | |
| Boston Scientific Corporation | 1 | $22.50 | |
| Ardelyx, Inc. | 1 | $18.72 | |
| Gilead Sciences, Inc. | 1 | $16.97 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,792
Patients
842
Total drug cost
$90,022
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 757 | 240 | $12,479 |
| Peg 3350-Electrolyte (Sodium Chloride/Nahco3/Kcl/Peg) | Brand | 385 | 370 | $8,815 |
| Famotidine | Generic | 265 | 103 | $5,251 |
| Omeprazole | Generic | 137 | 46 | $1,908 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,mag Sulfates) | Brand | 62 | 61 | $4,627 |
| Esomeprazole Magnesium | Generic | 31 | 0 | $1,321 |
| Mesalamine | Generic | 27 | 0 | $29,796 |
| Sutab (Sod Sulf/Pot Chloride/Mag Sulf) | Brand | 22 | 22 | $3,620 |
| Linzess (Linaclotide) | Brand | 20 | 0 | $18,116 |
| Balsalazide Disodium | Generic | 17 | 0 | $1,834 |
Hospital affiliations
Frequently asked questions
What is Dr. John Karagiannis's medical specialty?
Dr. John Karagiannis practices Gastroenterology Physician in Elkhart, IN.
Where does Dr. John Karagiannis practice?
Dr. John Karagiannis practices at 303 S Nappanee St, Elkhart, IN 465142066. Office phone: 5742963341.
What is Dr. John Karagiannis's NPI?
Dr. John Karagiannis's National Provider Identifier (NPI) is 1386647170, issued by NPPES.
Does Dr. John Karagiannis accept Medicare assignment?
Yes. Dr. John Karagiannis accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Karagiannis commonly perform?
Top Medicare-reported procedures in 2023: Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (HCPCS Q9967); Injection, gadobutrol, 0.1 ml (HCPCS A9585); Routine electrocardiogram (ecg) using at least 12 leads with tracing (HCPCS 93005). Source: CMS Medicare Physician & Other Practitioners file.