Nereida Diaz-Johnson, M.D.
NPI 1013939917ActiveIndividual· Internal Medicine· Union, NJ
Internal Medicine (M.D.) with Union Medical Group, LLC, practicing in Union, New Jersey. Their prescriptions cost Medicare Part D more than their services did: $1,101,100 for 7,441 claims, against $69,034 paid for services in 2024. Novo Nordisk Inc was the largest of 18 companies reporting payments in 2025, $1,125 in all, mostly food and beverage. Lists Morristown Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1013939917 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 23, 2006 |
| Last updated in NPPES | Mar 31, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | MA49304 | NJ |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (NJ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 156 |
|---|---|
| Services billed | 1,326 across 38 procedure codes |
| Paid by Medicare | $69,034 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,441 · 16,906 30-day fills |
|---|---|
| Patients | 537 |
| Total drug cost | $1,101,100 |
| Generic share | 83% of claims |
Education and affiliations
| Graduation year | 1985 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Union Medical Group, LLCUnion, NJ · 2 clinicians
Hospital affiliations
- Morristown Medical CenterMorristown, NJ
- Overlook Medical CenterSummit, NJ
Other facilities
- Atlantic Visiting NurseHome health agency · Morristown, NJ
Industry payments (Open Payments)
- 2025$1,125 · 52 payments from 18 companies
- 2024$736.97 · 42 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $289.94 | 11 |
| Kowa Pharmaceuticals America, Inc. | $172.66 | 5 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $108.12 | 7 |
| Dexcom, Inc. | $95.02 | 4 |
| Lilly USA, LLC | $87.24 | 5 |
What the 2025 payments were for
- Food and Beverage$1,125 · 52 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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