Christopher Mark Mathews, M.D.
NPI 1134166291ActiveIndividual· Internal Medicine, Gastroenterology· Kingsport, TN
Internal Medicine, Gastroenterology (M.D.) in Kingsport, Tennessee, trained at University of Miami, Lm Miller School of Medicine (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $1,224,427 for 1,676 claims, against $206,533 paid for services in 2024. Abbvie Inc. was the largest of 18 companies reporting payments in 2025, $1,371 in all, mostly food and beverage.
Overview
| NPI | 1134166291 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 31, 2006 |
| Last updated in NPPES | Mar 13, 2024 |
| Certified by provider | Mar 13, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 37787 | TN |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 506 |
|---|---|
| Services billed | 3,850 across 33 procedure codes |
| Paid by Medicare | $206,533 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,676 · 3,212 30-day fills |
|---|---|
| Patients | 650 |
| Total drug cost | $1,224,427 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | University of Miami, Lm Miller School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Gastroenterology |
Medical group
- Gastroenterology AssociatesKingsport, TN · 25 clinicians
Hospital affiliations
- Indian Path Community HospitalKingsport, TN
- Wellmont Holston Valley Medical CenterKingsport, TN
Industry payments (Open Payments)
- 2025$1,371 · 79 payments from 18 companies
- 2024$929.35 · 62 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $224.83 | 14 |
| Janssen Biotech, Inc. | $172.99 | 9 |
| Ardelyx, Inc. | $167.83 | 10 |
| Madrigal Pharmaceuticals | $145.01 | 6 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $135.88 | 10 |
What the 2025 payments were for
- Food and Beverage$1,371 · 79 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 22 gastroenterologists in Kingsport · All gastroenterologists in Tennessee