Mark Patrick Lewis, MD
NPI 1891985800ActiveIndividual· Internal Medicine· Mountain View, CA
Internal Medicine (MD) in Mountain View, California, trained at University of Southern California Keck School of Medicine (class of 2005). Their prescriptions cost Medicare Part D more than their services did: $523,364 for 5,377 claims, against $136,813 paid for services in 2024. Atricure, Inc. reported $23.79 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1891985800 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jul 26, 2007 |
| Last updated in NPPES | Dec 15, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A96667 | CA |
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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 443 |
|---|---|
| Services billed | 1,843 across 24 procedure codes |
| Paid by Medicare | $136,813 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,377 · 12,612 30-day fills |
|---|---|
| Patients | 409 |
| Total drug cost | $523,364 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | University of Southern California Keck School of Medicine |
|---|---|
| Graduation year | 2005 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Hospital affiliations
- El Camino HealthMountain View, CA
- Good Samaritan HospitalSan Jose, CA
- Stanford Health CareStanford, CA
Other facilities
- Best Home Health Providers, IncHome health agency · Hayward, CA
- Intouch Home Care, Inc.Home health agency · Santa Clara, CA
- Pathways Home Health and HospiceHome health agency · Sunnyvale, CA
- Sequoia Home HealthHome health agency · Milpitas, CA
- Sutter Care at HomeHome health agency · Saratoga, CA
Industry payments (Open Payments)
- 2025$23.79 · 1 payment from 1 company
- 2024$265.70 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Atricure, Inc. | $23.79 | 1 |
What the 2025 payments were for
- Food and Beverage$23.79 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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