Juan Carlos Armstrong, M.D.
NPI 1639259666ActiveIndividual· Internal Medicine, Pulmonary Disease· Acworth, GA
Internal Medicine, Pulmonary Disease (M.D.) in Acworth, Georgia, trained at University Central del Caribe Escuela de Medicina (class of 1994). Their prescriptions cost Medicare Part D more than their services did: $947,954 for 4,303 claims, against $98,557 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 12 companies reporting payments in 2025, $1,052 in all, mostly food and beverage.
Overview
| NPI | 1639259666 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 16, 2006 |
| Last updated in NPPES | Oct 22, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | 049848 | GA |
| Internal Medicine, Critical Care Medicine | 207RC0200X | 049848 | GA |
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 - Pulmonary Disease (GA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 399 |
|---|---|
| Services billed | 1,524 across 36 procedure codes |
| Paid by Medicare | $98,557 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,303 · 5,395 30-day fills |
|---|---|
| Patients | 568 |
| Total drug cost | $947,954 |
| Generic share | 66% of claims |
Education and affiliations
| Medical school | University Central del Caribe Escuela de Medicina |
|---|---|
| Graduation year | 1994 |
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Critical Care (Intensivists) |
| Telehealth | Offers telehealth |
Medical group
- Wellstar Medical Group LLCMarietta, GA · 3,093 clinicians
Hospital affiliations
- Wellstar Cobb Medical CenterAustell, GA
- Wellstar Kennestone Regional Medical CenterMarietta, GA
- Wellstar Paulding Medical CenterHiram, GA
Industry payments (Open Payments)
- 2025$1,052 · 49 payments from 12 companies
- 2024$1,121 · 59 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $286.22 | 18 |
| Glaxosmithkline, LLC. | $182.78 | 9 |
| Verona Pharma, Inc. | $139.99 | 6 |
| Sanofi-Aventis U.S. LLC | $99.99 | 1 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $87.53 | 3 |
What the 2025 payments were for
- Food and Beverage$952.43 · 48 payments
- Education$99.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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