Michael Steven Ritter, M.D.
NPI 1295769156ActiveIndividual· Emergency Medicine· Mission Viejo, CA
Emergency Medicine (M.D.) in Mission Viejo, California, trained at University of California, Irvine, California College of Medicine (class of 1991). Mostly services rather than prescriptions: Medicare paid $12,263 for 88 patients in 2024, with only 48 Part D claims.
Overview
| NPI | 1295769156 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jul 10, 2006 |
| Last updated in NPPES | Jun 27, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | G74723 | 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 - Emergency Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 88 |
|---|---|
| Services billed | 105 across 13 procedure codes |
| Paid by Medicare | $12,263 |
Part D prescriptions in 2024
| Prescriptions (claims) | 48 · 49 30-day fills |
|---|---|
| Patients | 31 |
| Total drug cost | $1,317 |
| Generic share | 94% of claims |
Education and affiliations
| Medical school | University of California, Irvine, California College of Medicine |
|---|---|
| Graduation year | 1991 |
| Medicare specialty | Emergency Medicine |
Medical group
- Mission Viejo Emergency Medical AssociatesMission Viejo, CA · 18 clinicians
Hospital affiliation
- Providence Mission HospitalMission Viejo, 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 24 emergency medicine physicians in Mission Viejo · All emergency medicine physicians in California