John Gilbert, M.D.
NPI 1588650667ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Fullerton, CA
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) in Fullerton, California, trained at State University of New York Downstate Medical Center (class of 1983). Their prescriptions cost Medicare Part D more than their services did: $3,670,560 for 11,752 claims, against $133,743 paid for services in 2024. Abbott Laboratories was the largest of 19 companies reporting payments in 2025, $78,619 in all, mostly compensation for serving as faculty or as a speaker for a me.
Overview
| NPI | 1588650667 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 23, 2005 |
| Last updated in NPPES | Oct 19, 2020 |
| Certified by provider | Oct 19, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | G53352 | CA |
| Internal Medicine | 207R00000X | G53352 | 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 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 - Endocrinology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 620 |
|---|---|
| Services billed | 10,792 across 45 procedure codes |
| Paid by Medicare | $133,743 |
Part D prescriptions in 2024
| Prescriptions (claims) | 11,752 · 29,747 30-day fills |
|---|---|
| Patients | 1,100 |
| Total drug cost | $3,670,560 |
| Generic share | 64% of claims |
Education and affiliations
| Medical school | State University of New York Downstate Medical Center |
|---|---|
| Graduation year | 1983 |
| Medicare specialty | Endocrinology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Providence Medical FoundationVictorville, CA · 1,466 clinicians
Hospital affiliations
- Providence St. Jude Medical CenterFullerton, CA
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$78,619 · 148 payments from 19 companies
- 2024$38,683 · 113 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbott Laboratories | $48,771 | 64 |
| Novo Nordisk Inc | $27,618 | 28 |
| Lilly USA, LLC | $997.72 | 7 |
| Recordati_rare_diseases_inc. | $222.16 | 4 |
| Corcept Therapeutics | $140.96 | 5 |
What the 2025 payments were for
- Compensation for serving as faculty or as a speaker for a medical education program$31,813 · 25 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$26,382 · 12 payments
- Travel and Lodging$9,122 · 18 payments
- Consulting Fee$7,500 · 1 payment
- Food and Beverage$3,760 · 91 payments
- Education$42.50 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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