Walter Moon Jo, MD
NPI 1043250004ActiveIndividual· Internal Medicine, Cardiovascular Disease· N Chelmsford, MA
Internal Medicine, Cardiovascular Disease (MD) in N Chelmsford, Massachusetts, trained at Tufts University School of Medicine (class of 1993). Their prescriptions cost Medicare Part D more than their services did: $1,184,575 for 6,831 claims, against $235,282 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 2 companies reporting payments in 2025, $120.32 in all, mostly food and beverage.
Overview
| NPI | 1043250004 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 7, 2006 |
| Last updated in NPPES | Mar 29, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 150611 | MA |
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 - Cardiovascular Disease (Cardiology) (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 2,730 |
|---|---|
| Services billed | 5,454 across 82 procedure codes |
| Paid by Medicare | $235,282 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,831 · 18,483 30-day fills |
|---|---|
| Patients | 953 |
| Total drug cost | $1,184,575 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | Tufts University School of Medicine |
|---|---|
| Graduation year | 1993 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
| Secondary specialties | Internal Medicine |
Medical groups
- Atrius Health IncBraintree, MA · 1,222 clinicians
- Lgh Merrimack Valley Cardiology Associates, LLCNorth Chelmsford, MA · 22 clinicians
Hospital affiliations
- Lowell General HospitalLowell, MA
- Tufts Medical CenterBoston, MA
Industry payments (Open Payments)
- 2025$120.32 · 4 payments from 2 companies
- 2024$184.87 · 7 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $102.67 | 3 |
| Pfizer Inc. | $17.65 | 1 |
What the 2025 payments were for
- Food and Beverage$120.32 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Internal Medicine, Cardiovascular Disease providers in Massachusetts →