John Loh
NPI 1306852827ActiveIndividual· Internal Medicine· Baltimore, MD
Internal Medicine in Baltimore, Maryland, trained at Michigan State University College of Human Medicine (class of 1984). Their prescriptions cost Medicare Part D more than their services did: $550,492 for 6,780 claims, against $139,403 paid for services in 2024. Amgen Inc. was the largest of 26 companies reporting payments in 2025, $1,959 in all, mostly food and beverage.
Overview
| NPI | 1306852827 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | Yes |
| NPI issued | Aug 1, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | H0035593 | MD |
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 - Internal Medicine (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 366 |
|---|---|
| Services billed | 2,285 across 54 procedure codes |
| Paid by Medicare | $139,403 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,780 · 16,231 30-day fills |
|---|---|
| Patients | 400 |
| Total drug cost | $550,492 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | Michigan State University College of Human Medicine |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Mace Medical LLCBaltimore, MD · 14 clinicians
Other facilities
- Home CallHome health agency · Westminster, MD
- Medstar Health Home CareHome health agency · Baltimore, MD
- The Johns Hopkins Home Health Services, IncHome health agency · Baltimore, MD
Industry payments (Open Payments)
- 2025$1,959 · 106 payments from 26 companies
- 2024$1,725 · 91 payments from 21 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $232.51 | 15 |
| Lilly USA, LLC | $190.61 | 11 |
| E.R. Squibb & Sons, L.L.C. | $169.11 | 10 |
| Astrazeneca Pharmaceuticals LP | $167.36 | 10 |
| Exact Sciences Corporation | $141.08 | 10 |
What the 2025 payments were for
- Food and Beverage$1,959 · 106 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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