Steven Loy-Ngan Eng, M.D.
NPI 1881798189ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Long Beach, CA
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) in Long Beach, California, trained at Rutgers New Jersey Medical School (class of 1999). Their prescriptions cost Medicare Part D more than their services did: $2,928,422 for 8,395 claims, against $193,763 paid for services in 2024. Amgen Inc. was the largest of 24 companies reporting payments in 2025, $1,677 in all, mostly food and beverage.
Overview
| NPI | 1881798189 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 8, 2006 |
| Last updated in NPPES | Aug 12, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | A74358 | 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 - Endocrinology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 765 |
|---|---|
| Services billed | 3,580 across 11 procedure codes |
| Paid by Medicare | $193,763 |
Part D prescriptions in 2024
| Prescriptions (claims) | 8,395 · 20,304 30-day fills |
|---|---|
| Patients | 1,027 |
| Total drug cost | $2,928,422 |
| Generic share | 47% of claims |
Education and affiliations
| Medical school | Rutgers New Jersey Medical School |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Endocrinology |
| Secondary specialties | Internal Medicine |
Medical group
- Steven L Eng MD IncLakewood, CA · 2 clinicians
Hospital affiliations
- Memorialcare Long Beach Medical CenterLong Beach, CA
- Uci Health-LakewoodLakewood, CA
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$1,677 · 80 payments from 24 companies
- 2024$1,390 · 66 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $270.34 | 17 |
| Abbott Laboratories | $197.20 | 12 |
| Dexcom, Inc. | $173.82 | 12 |
| Novo Nordisk Inc | $166.33 | 9 |
| Biotissue Holdings Inc. | $102.19 | 1 |
What the 2025 payments were for
- Food and Beverage$1,629 · 78 payments
- Education$48.52 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 25 endocrinologists in Long Beach · All endocrinologists in California