Quick answers
- Where does John C. McDonagh see patients?
- Medicare's clinician data lists 7 practice locations, including New Haven, CT and East Haven, CT. Call before your visit to confirm the address.
- What is John C. McDonagh's specialty?
- Medicare lists Addiction Medicine as the primary specialty, and also Emergency Medicine and Medical Toxicology.
- Does John C. McDonagh accept Medicare assignment?
- Yes. Medicare's clinician data says John C. McDonagh accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for John C. McDonagh?
- (203) 777-7411, as listed in official Medicare / NPI Registry data.
- What is John C. McDonagh's NPI number?
- 1265430193. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where John C. McDonagh is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.
- 100 James StNew Haven, CT 06513 (203) 777‑7411
- 164 Grand AveNew Haven, CT 06513 (203) 777‑7411
- 293 Clinton AveNew Haven, CT 06513 (203) 777‑7411
- 339 Eastern St, Bldg BNew Haven, CT 06513 (203) 777‑7411
- 35 Wheelbarrow LnEast Haven, CT 06513 (203) 777‑7411
Group practices
Medicare enrollment lists John C. McDonagh as a member of this group (CMS data updated 2026-10-02).
- Fair Haven Community Health Clinic Inc45 clinicians in the group
Specialties
- Addiction Medicineprimary
- Emergency Medicinealso
- Medical Toxicologyalso
Other addiction medicine doctors in New Haven
Clinicians with the same Medicare primary specialty in New Haven, CT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York At Stony Brook, School Of Medicine |
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1265430193 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians