Mariana Zacharias Andre Chemaly, MD
NPI 1811183056ActiveIndividual· Internal Medicine· Lowell, MA
Internal Medicine (MD) with Mill City Medical Group Ltd, practicing in Lowell, Massachusetts. Their prescriptions cost Medicare Part D more than their services did: $431,120 for 5,329 claims, against $134,350 paid for services in 2024. Astellas Pharma US Inc was the largest of 3 companies reporting payments in 2025, $126.74 in all, mostly food and beverage. Lists Lahey Hospital & Medical Center, Burlington and 1 other hospital as hospital affiliations.
Overview
| NPI | 1811183056 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 21, 2007 |
| Last updated in NPPES | Jan 18, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 238062 | MA |
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 - Internal Medicine (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 535 |
|---|---|
| Services billed | 1,863 across 40 procedure codes |
| Paid by Medicare | $134,350 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,329 · 13,248 30-day fills |
|---|---|
| Patients | 640 |
| Total drug cost | $431,120 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2001 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Mill City Medical Group LtdLowell, MA · 20 clinicians
Hospital affiliations
- Lahey Hospital & Medical Center, BurlingtonBurlington, MA
- Lowell General HospitalLowell, MA
Other facilities
- Amedisys Home Health CareHome health agency · Wakefield, MA
- Pathways HealthcareHome health agency · Westwood, MA
- Tufts Medicine Care at HomeHome health agency · Lowell, MA
- Tufts Medicine Care at Home - Home Health NhHome health agency · North Hampton, NH
- Northeast Rehabilitation HospitalInpatient rehabilitation facility · Salem, NH
Industry payments (Open Payments)
- 2025$126.74 · 6 payments from 3 companies
- 2024$145.60 · 5 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astellas Pharma US Inc | $53.86 | 2 |
| Inspire Medical Systems, Inc. | $53.58 | 3 |
| Lilly USA, LLC | $19.30 | 1 |
What the 2025 payments were for
- Food and Beverage$126.74 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 76 internal medicine physicians in Lowell · All internal medicine physicians in Massachusetts