Catharina Armstrong, MD
NPI 1538295217ActiveIndividual· Internal Medicine· Worcester, MA
Internal Medicine (MD) with Mass General Brigham Medical Group Suburban Massachusetts Inc, practicing in Worcester, Massachusetts. Their prescriptions cost Medicare Part D more than their services did: $12,454 for 108 claims, against $6,309 paid for services in 2024. Braeburn Inc. was the largest of 2 companies reporting payments in 2025, $485.49 in all, mostly food and beverage. Lists Massachusetts General Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1538295217 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Feb 26, 2007 |
| Last updated in NPPES | Mar 25, 2021 |
| Certified by provider | Mar 25, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | L-221067 | 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 - Infectious Disease (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 18 |
|---|---|
| Services billed | 70 across 5 procedure codes |
| Paid by Medicare | $6,309 |
Part D prescriptions in 2024
| Prescriptions (claims) | 108 · 120 30-day fills |
|---|---|
| Patients | 25 |
| Total drug cost | $12,454 |
| Generic share | 95% of claims |
Education and affiliations
| Graduation year | 2003 |
|---|---|
| Medicare specialty | Infectious Disease |
| Telehealth | Offers telehealth |
Medical group
- Mass General Brigham Medical Group Suburban Massachusetts IncPembroke, MA · 602 clinicians
Hospital affiliations
- Massachusetts General HospitalBoston, MA
- Newton-Wellesley HospitalNewton, MA
Industry payments (Open Payments)
- 2025$485.49 · 9 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Braeburn Inc. | $468.34 | 8 |
| Alkermes, Inc. | $17.15 | 1 |
What the 2025 payments were for
- Food and Beverage$485.49 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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