Marc K. Dao, MD
NPI 1467542175ActiveIndividual· Internal Medicine· Escondido, CA
Internal Medicine (MD) in Escondido, California, trained at Medical College of Wisconsin (class of 2002). Their prescriptions cost Medicare Part D more than their services did: $169,844 for 1,462 claims, against $62,782 paid for services in 2024. Dexcom, Inc. reported $68.11 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1467542175 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 13, 2006 |
| Last updated in NPPES | Nov 1, 2022 |
| Certified by provider | Nov 1, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | C142559 | CA |
| Internal Medicine | 207R00000X | 48006 | WI |
| Internal Medicine | 207R00000X | N6851 | TX |
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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 376 |
|---|---|
| Services billed | 854 across 7 procedure codes |
| Paid by Medicare | $62,782 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,462 · 2,943 30-day fills |
|---|---|
| Patients | 308 |
| Total drug cost | $169,844 |
| Generic share | 82% of claims |
Education and affiliations
| Medical school | Medical College of Wisconsin |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Internal Medicine |
Medical groups
- 24 on Physicians of California PCEl Centro, CA · 57 clinicians
- Vista Community ClinicVista, CA · 44 clinicians
Hospital affiliations
- El Centro Regional Medical CenterEl Centro, CA
- Pioneers Memorial Healthcare DistrictBrawley, CA
- Uc San Diego Health Hillcrest - Hillcrest Med CtrSan Diego, CA
Industry payments (Open Payments)
- 2025$68.11 · 4 payments from 1 company
- 2024$120.56 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Dexcom, Inc. | $68.11 | 4 |
What the 2025 payments were for
- Food and Beverage$68.11 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 66 internal medicine physicians in Escondido · All internal medicine physicians in California