Quick answers
- Which hospitals does John E. Postley Jr. work at?
- Medicare's official clinician data lists John E. Postley Jr. at 1 hospital: Suny/Stony Brook University Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John E. Postley Jr. see patients?
- Medicare's clinician data lists 2 practice locations, including Fairfield, CT and New York, NY. Call before your visit to confirm the address.
- What is John E. Postley Jr.'s specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does John E. Postley Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says John E. Postley Jr. 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.
- Does John E. Postley Jr. offer telehealth?
- Medicare's clinician data says John E. Postley Jr. offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John E. Postley Jr.?
- (203) 384-8681, as listed in official Medicare / NPI Registry data.
- What is John E. Postley Jr.'s NPI number?
- 1558367631. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John E. Postley Jr. works
Medicare's Facility Affiliation Data lists John E. Postley Jr. at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Suny/Stony Brook University HospitalStony Brook, NY · Acute Care Hospital · CCN 330393
Practice locations
Addresses where John E. Postley Jr. is enrolled with Medicare (CMS data updated 2026-10-02).
- 1931 Black Rock TpkeFairfield, CT 06825 (203) 384‑8681
- 575 Madison Ave, Suite 1501New York, NY 10022 (212) 857‑4522
Group practices
Medicare enrollment lists John E. Postley Jr. as a member of these groups (CMS data updated 2026-10-02).
- Rehabilitation Associates Inc529 clinicians in the group
- The Madison Physicians, LLP6 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Fairfield
Clinicians with the same Medicare primary specialty in Fairfield, CT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Columbia University College Of Physicians And Surgeons |
| Graduation year | 1968 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1558367631 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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