Essam A. Mostafa, M.D.
NPI 1316932270ActiveIndividual· Internal Medicine, Nephrology· Fountain Valley, CA
Internal Medicine, Nephrology (M.D.) with Premier Nephrology of Orange County Inc, practicing in Fountain Valley, California. In 2024 Medicare paid $587,715 for 491 patients, and Part D covered 480 of their prescriptions, 80% of them generic. Boehringer Ingelheim Pharmaceuticals, Inc. reported $57.20 in payments in 2025, mostly food and beverage. Lists Garden Grove Hospital & Medical Center and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1316932270 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 16, 2005 |
| Last updated in NPPES | Sep 16, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | C55143 | 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 - Nephrology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 491 |
|---|---|
| Services billed | 4,884 across 13 procedure codes |
| Paid by Medicare | $587,715 |
Part D prescriptions in 2024
| Prescriptions (claims) | 480 · 736 30-day fills |
|---|---|
| Patients | 80 |
| Total drug cost | $70,602 |
| Generic share | 80% of claims |
Education and affiliations
| Graduation year | 1992 |
|---|---|
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Medical group
- Premier Nephrology of Orange County IncFountain Valley, CA · 3 clinicians
Hospital affiliations
- Garden Grove Hospital & Medical CenterGarden Grove, CA
- Huntington Beach HospitalHuntington Beach, CA
- Memorialcare Orange Coast Medical CenterFountain Valley, CA
- Uci Health-OrangeOrange, CA
Other facilities
- Davita Costa Mesa DialysisDialysis facility · Costa Mesa, CA
- Davita Fountain Valley DialysisDialysis facility · Fountain Valley, CA
- Davita Garden Grove Harbor DialysisDialysis facility · Garden Grove, CA
- Rai - Garden Grove Blvd - Garden GroveDialysis facility · Garden Grove, CA
- Rai-Harbor Blvd - Garden GroveDialysis facility · Garden Grove, CA
Industry payments (Open Payments)
- 2025$57.20 · 3 payments from 1 company
- 2024$293.66 · 14 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. | $57.20 | 3 |
What the 2025 payments were for
- Food and Beverage$57.20 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 35 nephrologists in Fountain Valley · All nephrologists in California