Katharine M. O'Brien, DO
NPI 1083720718ActiveIndividual· Family Medicine· Menifee, CA
Family Medicine (DO) with Kolli Medical Corporation, practicing in Menifee, California. Their prescriptions cost Medicare Part D more than their services did: $601,197 for 5,327 claims, against $12,363 paid for services in 2024. Glaxosmithkline, LLC. was the largest of 4 companies reporting payments in 2025, $280.55 in all, mostly food and beverage.
Overview
| NPI | 1083720718 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Aug 23, 2006 |
| Last updated in NPPES | Apr 18, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 20A7203 | CA |
| Family Medicine | 207Q00000X | K6898 | TX |
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 | 54 |
|---|---|
| Services billed | 186 across 13 procedure codes |
| Paid by Medicare | $12,363 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,327 · 12,055 30-day fills |
|---|---|
| Patients | 342 |
| Total drug cost | $601,197 |
| Generic share | 83% of claims |
Education and affiliations
| Graduation year | 1995 |
|---|---|
| Medicare specialty | Family Practice |
Medical group
- Kolli Medical CorporationHemet, CA · 5 clinicians
Industry payments (Open Payments)
- 2025$280.55 · 19 payments from 4 companies
- 2024$149.68 · 9 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Glaxosmithkline, LLC. | $136.47 | 13 |
| Novo Nordisk Inc | $71.62 | 3 |
| Neurocrine Biosciences, Inc. | $50.69 | 2 |
| Kowa Pharmaceuticals America, Inc. | $21.77 | 1 |
What the 2025 payments were for
- Food and Beverage$280.55 · 19 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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