Dale Joseph Ritzo, M.D.
NPI 1255499323ActiveIndividual· Internal Medicine· San Mateo, CA
Internal Medicine (M.D.) in San Mateo, California, trained at University of Southern California Keck School of Medicine (class of 1983). Their prescriptions cost Medicare Part D more than their services did: $287,777 for 3,598 claims, against $88,719 paid for services in 2024.
Overview
| NPI | 1255499323 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Dec 4, 2006 |
| Last updated in NPPES | Jun 28, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | G50169 | 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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 315 |
|---|---|
| Services billed | 10,584 across 29 procedure codes |
| Paid by Medicare | $88,719 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,598 · 8,356 30-day fills |
|---|---|
| Patients | 286 |
| Total drug cost | $287,777 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | University of Southern California Keck School of Medicine |
|---|---|
| Graduation year | 1983 |
| Medicare specialty | Internal Medicine |
Hospital affiliation
- Peninsula Medical CenterBurlingame, CA
Other facilities
- Home Health Bay Area Inc.Home health agency · Daly City, CA
- Pathways Home Health and HospiceHome health agency · Sunnyvale, CA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 55 internal medicine physicians in San Mateo · All internal medicine physicians in California