Greg A. Brown, M.D.
NPI 1720135346ActiveIndividual· Internal Medicine· San Clemente, CA
Internal Medicine (M.D.) in San Clemente, California, licensed in CA, with an NPI issued in January 2007. Their prescriptions cost Medicare Part D more than their services did: $997,785 for 9,663 claims, against $47,764 paid for services in 2024. Boehringer Ingelheim Pharmaceuticals, Inc. was the largest of 2 companies reporting payments in 2025, $599.12 in all, mostly food and beverage. Lists Memorialcare Saddleback Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1720135346 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jan 4, 2007 |
| Last updated in NPPES | Dec 16, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A40335 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 167 |
|---|---|
| Services billed | 1,154 across 31 procedure codes |
| Paid by Medicare | $47,764 |
Part D prescriptions in 2024
| Prescriptions (claims) | 9,663 · 21,283 30-day fills |
|---|---|
| Patients | 583 |
| Total drug cost | $997,785 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 1983 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Addiction Medicine |
Hospital affiliations
- Memorialcare Saddleback Medical CenterLaguna Hills, CA
- Providence Mission HospitalMission Viejo, CA
Other facilities
- Acacia Hh&p of Southern California, LLCHome health agency · Irvine, CA
Industry payments (Open Payments)
- 2025$599.12 · 13 payments from 2 companies
- 2024$777.62 · 32 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. | $308.56 | 8 |
| Novo Nordisk Inc | $290.56 | 5 |
What the 2025 payments were for
- Food and Beverage$599.12 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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