Conor McColgan Stack, M.D.
NPI 1083976807ActiveIndividual· Internal Medicine, Infectious Disease· Boston, MA
Internal Medicine, Infectious Disease (M.D.) in Boston, Massachusetts, trained at State University of Ny Upstate Medical University (class of 2012). Their prescriptions cost Medicare Part D more than their services did: $525,342 for 359 claims, against $40,934 paid for services in 2024. Sanofi Pasteur Inc. reported $2,655 in payments in 2025, mostly consulting fees.
Overview
| NPI | 1083976807 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 8, 2012 |
| Last updated in NPPES | Aug 15, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | 266559 | MA |
| Internal Medicine | 207R00000X | 252843 | 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 | 254 |
|---|---|
| Services billed | 482 across 14 procedure codes |
| Paid by Medicare | $40,934 |
Part D prescriptions in 2024
| Prescriptions (claims) | 359 · 450 30-day fills |
|---|---|
| Patients | 82 |
| Total drug cost | $525,342 |
| Generic share | 70% of claims |
Education and affiliations
| Medical school | State University of Ny Upstate Medical University |
|---|---|
| Graduation year | 2012 |
| Medicare specialty | Infectious Disease |
| Telehealth | Offers telehealth |
Medical group
- Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr IncBoston, MA · 1,740 clinicians
Hospital affiliations
- Beth Israel Deaconess Hospital - MiltonMilton, MA
- Beth Israel Deaconess Hospital - NeedhamNeedham, MA
- Beth Israel Deaconess Medical CenterBoston, MA
Industry payments (Open Payments)
- 2025$2,655 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Sanofi Pasteur Inc. | $2,655 | 1 |
What the 2025 payments were for
- Consulting Fee$2,655 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Infectious Disease providers in Boston
- 1447574132
- 1659691442
- 1891280954
- 1598922742
- 1700907151
- 1528472644
- 1386737856
- 1457361933
- 1841336039
- 1740592443
- 1285016881
- 1770075863
All Internal Medicine, Infectious Disease providers in Massachusetts →