Lisa K. Mathew, M.D.
NPI 1639331200ActiveIndividual· Internal Medicine, Gastroenterology· Castle Rock, CO
Internal Medicine, Gastroenterology (M.D.) in Castle Rock, Colorado, trained at Duke University School of Medicine (class of 2008). Their prescriptions cost Medicare Part D more than their services did: $110,798 for 418 claims, against $46,743 paid for services in 2024. Abbvie Inc. was the largest of 21 companies reporting payments in 2025, $3,356 in all, mostly food and beverage.
Overview
| NPI | 1639331200 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 25, 2008 |
| Last updated in NPPES | Aug 23, 2023 |
| Certified by provider | Aug 23, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | DR.0054046 | CO |
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 (CO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 206 |
|---|---|
| Services billed | 418 across 33 procedure codes |
| Paid by Medicare | $46,743 |
Part D prescriptions in 2024
| Prescriptions (claims) | 418 · 724 30-day fills |
|---|---|
| Patients | 185 |
| Total drug cost | $110,798 |
| Generic share | 70% of claims |
Education and affiliations
| Medical school | Duke University School of Medicine |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- South Denver Gastroenterology, P.CLone Tree, CO · 54 clinicians
Hospital affiliations
- Adventhealth Castle RockCastle Rock, CO
- Sky Ridge Medical CenterLone Tree, CO
Industry payments (Open Payments)
- 2025$3,356 · 132 payments from 21 companies
- 2024$3,017 · 135 payments from 20 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $702.64 | 23 |
| Takeda Pharmaceuticals U.S.A., Inc. | $427.48 | 16 |
| Janssen Biotech, Inc. | $396.41 | 16 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $313.29 | 14 |
| Genzyme Corporation | $173.39 | 9 |
What the 2025 payments were for
- Food and Beverage$3,345 · 131 payments
- Education$10.48 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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