Lyndon V. Hernandez, MD
NPI 1831166503ActiveIndividual· Internal Medicine, Gastroenterology· Milwaukee, WI
Internal Medicine, Gastroenterology (MD) with Ascension Medical Group-Southeast Wisconsin Inc and 1 other group, practicing in Milwaukee, Wisconsin. Their prescriptions cost Medicare Part D more than their services did: $882,343 for 1,868 claims, against $82,566 paid for services in 2024. Olympus Corporation of the Americas reported $639.78 in payments in 2025, mostly travel and lodging. Lists Ascension All Saints Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1831166503 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 2, 2006 |
| Last updated in NPPES | Jan 26, 2026 |
| Certified by provider | Jan 26, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 34928-20 | WI |
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 - Gastroenterology (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 447 |
|---|---|
| Services billed | 839 across 57 procedure codes |
| Paid by Medicare | $82,566 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,868 · 2,947 30-day fills |
|---|---|
| Patients | 842 |
| Total drug cost | $882,343 |
| Generic share | 77% of claims |
Education and affiliations
| Graduation year | 1990 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical groups
- Ascension Medical Group-Southeast Wisconsin IncBrookfield, WI · 545 clinicians
- Gi Associates LLCMilwaukee, WI · 55 clinicians
Hospital affiliations
- Ascension All Saints HospitalRacine, WI
- Ascension Se Wisconsin HospitalMilwaukee, WI
- Aurora Medical Center KenoshaKenosha, WI
Industry payments (Open Payments)
- 2025$639.78 · 2 payments from 1 company
- 2024$158.60 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Olympus Corporation of the Americas | $639.78 | 2 |
What the 2025 payments were for
- Travel and Lodging$639.78 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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