John Chronakos, M.D.
NPI 1609801273ActiveIndividual· Internal Medicine, Pulmonary Disease· Danbury, CT
Internal Medicine, Pulmonary Disease (M.D.) in Danbury, Connecticut, trained at New York University School of Medicine (class of 1998). Their prescriptions cost Medicare Part D more than their services did: $509,383 for 1,734 claims, against $148,519 paid for services in 2024. Glaxosmithkline, LLC. reported $40.54 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1609801273 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 12, 2006 |
| Last updated in NPPES | Jul 31, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | 042126 | CT |
| Internal Medicine, Critical Care Medicine | 207RC0200X | 042126 | CT |
| Internal Medicine, Sleep Medicine | 207RS0012X | 042126 | CT |
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 - Pulmonary Disease (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 740 |
|---|---|
| Services billed | 1,637 across 58 procedure codes |
| Paid by Medicare | $148,519 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,734 · 2,681 30-day fills |
|---|---|
| Patients | 445 |
| Total drug cost | $509,383 |
| Generic share | 62% of claims |
Education and affiliations
| Medical school | New York University School of Medicine |
|---|---|
| Graduation year | 1998 |
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Critical Care (Intensivists) |
| Telehealth | Offers telehealth |
Medical group
- Nuvance Health Medical Practice CT IncDanbury, CT · 747 clinicians
Hospital affiliations
- Danbury HospitalDanbury, CT
- Griffin HospitalDerby, CT
- Putnam Hospital CenterCarmel, NY
Other facilities
- Western Connecticut Home Care IncHome health agency · Danbury, CT
- Regional HospiceHospice · Danbury, CT
Industry payments (Open Payments)
- 2025$40.54 · 2 payments from 1 company
- 2024$18.15 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Glaxosmithkline, LLC. | $40.54 | 2 |
What the 2025 payments were for
- Food and Beverage$40.54 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 17 pulmonologists in Danbury · All pulmonologists in Connecticut