Karl Tq Mersich, MD
NPI 1275633737ActiveIndividual· Internal Medicine, Gastroenterology· Orange City, FL
Internal Medicine, Gastroenterology (MD) with Gastroenterology Associates of Southwest Florida LLC and 1 other group, practicing in Orange City, Florida. Their prescriptions cost Medicare Part D more than their services did: $100,473 for 549 claims, against $40,737 paid for services in 2024. Capsovision, Inc. was the largest of 3 companies reporting payments in 2025, $198.86 in all, mostly food and beverage. Lists Adventhealth Fish Memorial as a hospital affiliation.
Overview
| NPI | 1275633737 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 25, 2006 |
| Last updated in NPPES | Feb 23, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 134072 | FL |
| Internal Medicine, Gastroenterology | 207RG0100X | 177994-1 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (FL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 136 |
|---|---|
| Services billed | 555 across 25 procedure codes |
| Paid by Medicare | $40,737 |
Part D prescriptions in 2024
| Prescriptions (claims) | 549 · 945 30-day fills |
|---|---|
| Patients | 201 |
| Total drug cost | $100,473 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 1997 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical groups
- Gastroenterology Associates of Southwest Florida LLCCape Coral, FL · 66 clinicians
- Gastro MD Florida, LLCOrange City, FL · 34 clinicians
Hospital affiliation
- Adventhealth Fish MemorialOrange City, FL
Industry payments (Open Payments)
- 2025$198.86 · 4 payments from 3 companies
- 2024$286.36 · 9 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Capsovision, Inc. | $104.82 | 1 |
| Phathom Pharmaceuticals, Inc. | $78.07 | 2 |
| Amgen Inc. | $15.97 | 1 |
What the 2025 payments were for
- Food and Beverage$198.86 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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