Corey Warner, M.D.
NPI 1801998968ActiveIndividual· Internal Medicine· Hidden Valley Lake, CA
Internal Medicine (M.D.) in Hidden Valley Lake, California, trained at Oregon Health Sciences University School of Medicine (class of 1997). Part D covered 12,334 prescriptions written in 2024, 87% of them generic. Novo Nordisk Inc was the largest of 9 companies reporting payments in 2025, $775.18 in all, mostly food and beverage.
Overview
| NPI | 1801998968 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 1, 2006 |
| Last updated in NPPES | Jun 25, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | C53422 | CA |
| Internal Medicine | 207R00000X | 036103245 | IL |
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) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 12,334 · 19,303 30-day fills |
|---|---|
| Patients | 1,030 |
| Total drug cost | $1,278,321 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | Oregon Health Sciences University School of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Internal Medicine |
Medical group
- Adventist Health Clearlake Hospital Inc.Clearlake, CA · 87 clinicians
Hospital affiliations
- Adventist Health ClearlakeClearlake, CA
- Adventist Health St HelenaSaint Helena, CA
- Adventist Health Ukiah ValleyUkiah, CA
- Sutter Lakeside HospitalLakeport, CA
Other facilities
- Adventist Health Home Care ServicesHome health agency · Lower Lake, CA
- Silverline Staff Home HealthHome health agency · Fremont, CA
- Sutter Care at HomeHome health agency · Lakeport, CA
Industry payments (Open Payments)
- 2025$775.18 · 29 payments from 9 companies
- 2024$428.10 · 22 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $229.12 | 7 |
| Abbvie Inc. | $196.27 | 7 |
| Neurocrine Biosciences, Inc. | $93.67 | 3 |
| Lilly USA, LLC | $63.77 | 3 |
| Astrazeneca Pharmaceuticals LP | $57.68 | 3 |
What the 2025 payments were for
- Food and Beverage$775.18 · 29 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other internal medicine physicians in Hidden Valley Lake
- 1336428390
- 1578860722
- 1699054650