Doctor profile · Federal record
Dr. Karthik Ragunathan, MD
Gastroenterology Physician (CMS: Gastroenterology) · Student in an Organized Health Care Education/Training Program · Denison, TX
- NPI 1497195457
- Accepts Medicare
- 15 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
5012 S US Highway 75 Ste 250
Denison, TX 750204587
(903) 416-6255
fax (903) 416-6257
Credentials & registration
- NPI registered
- July 2013 — 13 yrs on file
- Profile last updated
- March 6, 2025
- Year of graduation
- 2011 — 15 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Kansas #04-41687
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1497195457. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,207
Distinct HCPCS
10
Medicare allowed
$130,017
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 237 | 234 | $230 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 213 | 196 | $43 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 187 | 184 | $29 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 152 | 86 | $75 | |
43249 |
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm | 90 | 79 | $99 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 80 | 79 | $124 | |
43251 |
Removal of polyps or growths of esophagus, stomach, and/or upper small bowel using an endoscope with mechanical snare | 73 | 73 | $145 | |
45381 |
Injection beneath lining of large bowel using a flexible endoscope | 35 | 33 | $17 | |
43235 |
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 30 | 30 | $104 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 29 | 22 | $114 |
In context: peer comparison
Among 4 peers in Denison Gastroenterology Physician, average services per provider: 115. This provider delivers 10× the peer median.Open Payments
Industry payments received
All-time total
$250
Transactions
9
Manufacturers
4
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 6 | $169.59 | |
| Novo Nordisk INC | 1 | $34.08 | |
| Phathom Pharmaceuticals, INC. | 1 | $27.58 | |
| Pfizer INC. | 1 | $18.27 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
559
Patients
411
Total drug cost
$12,059
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 209 | 95 | $3,123 |
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 186 | 183 | $2,987 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,Mag Sulfates) | Brand | 47 | 46 | $3,814 |
| Pantoprazole Sodium | Generic | 44 | 16 | $605 |
| Peg 3350-Electrolyte (Sodium Chloride/Nahco3/Kcl/Peg) | Brand | 32 | 31 | $809 |
| Peg-3350 and Electrolytes (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 30 | 29 | $517 |
| Gavilyte-C (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 11 | 11 | $204 |
Frequently asked questions
What is Dr. Karthik Ragunathan's medical specialty?
Dr. Karthik Ragunathan practices Gastroenterology Physician in Denison, TX.
Where does Dr. Karthik Ragunathan practice?
Dr. Karthik Ragunathan practices at 5012 S US Highway 75 Ste 250, Denison, TX 750204587. Office phone: 9034166255.
What is Dr. Karthik Ragunathan's NPI?
Dr. Karthik Ragunathan's National Provider Identifier (NPI) is 1497195457, issued by NPPES.
Does Dr. Karthik Ragunathan accept Medicare assignment?
Yes. Dr. Karthik Ragunathan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Karthik Ragunathan commonly perform?
Top Medicare-reported procedures in 2023: Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239); Biopsy of large bowel using a flexible endoscope (HCPCS 45380). Source: CMS Medicare Physician & Other Practitioners file.