Christopher Robert Entwisle, M.D.
NPI 1841256963ActiveIndividual· Internal Medicine, Gastroenterology· Livermore, CA
Internal Medicine, Gastroenterology (M.D.) in Livermore, California, trained at New York Medical College (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $324,077 for 1,891 claims, against $163,336 paid for services in 2024. Mauna Kea Technologies, Inc. reported $29.45 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1841256963 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 26, 2006 |
| Last updated in NPPES | Apr 8, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A95045 | CA |
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 (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 710 |
|---|---|
| Services billed | 1,173 across 24 procedure codes |
| Paid by Medicare | $163,336 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,891 · 4,086 30-day fills |
|---|---|
| Patients | 609 |
| Total drug cost | $324,077 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | New York Medical College |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Stanford Health CareStanford, CA · 3,122 clinicians
Hospital affiliations
- Stanford Health CareStanford, CA
- Stanford Health Care Tri-ValleyPleasanton, CA
Industry payments (Open Payments)
- 2025$29.45 · 1 payment from 1 company
- 2024$283.95 · 25 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Mauna Kea Technologies, Inc. | $29.45 | 1 |
What the 2025 payments were for
- Food and Beverage$29.45 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other gastroenterologists in Livermore
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- 1760915771