John Nick Chafos, MD
NPI 1871673830ActiveIndividual· Internal Medicine· Green Brook, NJ
Internal Medicine (MD) in Green Brook, New Jersey, trained at Tufts University School of Medicine (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $464,898 for 4,803 claims, against $132,197 paid for services in 2024.
Overview
| NPI | 1871673830 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 16, 2006 |
| Last updated in NPPES | Mar 29, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 25MA05399400 | NJ |
| Emergency Medicine | 207P00000X | 25MA05399400 | NJ |
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 - Family Practice (NJ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 497 |
|---|---|
| Services billed | 6,115 across 94 procedure codes |
| Paid by Medicare | $132,197 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,803 · 10,015 30-day fills |
|---|---|
| Patients | 720 |
| Total drug cost | $464,898 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | Tufts University School of Medicine |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Family Practice |
| Secondary specialties | Emergency Medicine |
Medical group
- Family Care PAGreen Brook, NJ · 10 clinicians
Hospital affiliation
- Robert Wood Johnson University Hospital - SomersetSomerville, NJ
Other facilities
- Hackensack Meridian Jfk at HomeHome health agency · Iselin, NJ
- Robert Wood Johnson Visiting Nurses, IncHome health agency · North Brunswick, NJ
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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