Mary M. Koumas, D.O.
NPI 1306838909ActiveIndividual· Family Medicine· Lake Forest, CA
Family Medicine (D.O.) in Lake Forest, California, trained at At Still University of Health Sciences, College of Osteo Med, Kirksville (class of 1978). Their prescriptions cost Medicare Part D more than their services did: $112,563 for 1,566 claims, against $34,395 paid for services in 2024.
Overview
| NPI | 1306838909 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Aug 19, 2005 |
| Last updated in NPPES | Dec 9, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 20A4402 | 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 - Family Practice (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 99 |
|---|---|
| Services billed | 399 across 17 procedure codes |
| Paid by Medicare | $34,395 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,566 · 3,937 30-day fills |
|---|---|
| Patients | 138 |
| Total drug cost | $112,563 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | At Still University of Health Sciences, College of Osteo Med, Kirksville |
|---|---|
| Graduation year | 1978 |
| Medicare specialty | Family Practice |
| Secondary specialties | Osteopathic Manipulative Medicine |
| Telehealth | Offers telehealth |
Medical group
- Lake Forest Medical Group, Inc.Lake Forest, CA · 2 clinicians
Hospital affiliations
- Memorialcare Saddleback Medical CenterLaguna Hills, CA
- Providence Mission HospitalMission Viejo, CA
Other facilities
- Care Plus Home HealthHome health agency · Laguna Hills, 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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