Quick answers
- Which hospitals does Alexander M. Johnston work at?
- Medicare's official clinician data lists Alexander M. Johnston at 4 hospitals: Cayuga Medical Center at Ithaca, Corning Hospital, Our Lady of Lourdes Memorial Hospital, Inc and Robert Packer Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Alexander M. Johnston see patients?
- Medicare's clinician data lists 2 practice locations, including Corning, NY and Sayre, PA. Call before your visit to confirm the address.
- What is Alexander M. Johnston's specialty?
- Medicare lists General Surgery as the primary specialty, and also Critical Care (Intensivists).
- Does Alexander M. Johnston accept Medicare assignment?
- Yes. Medicare's clinician data says Alexander M. Johnston 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 Alexander M. Johnston?
- (607) 973-7200, as listed in official Medicare / NPI Registry data.
- What is Alexander M. Johnston's NPI number?
- 1356785604. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Alexander M. Johnston works
Medicare's Facility Affiliation Data lists Alexander M. Johnston at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cayuga Medical Center at IthacaIthaca, NY · Acute Care Hospital · CCN 330307
- Corning HospitalCorning, NY · Acute Care Hospital · CCN 330277
- Our Lady of Lourdes Memorial Hospital, IncBinghamton, NY · Acute Care Hospital · CCN 330011
- Robert Packer HospitalSayre, PA · Acute Care Hospital · CCN 390079
Practice locations
Addresses where Alexander M. Johnston is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Guthrie DrCorning, NY 14830 (607) 973‑7200
- 1 Guthrie SqSayre, PA 18840 (570) 887‑3192
Group practices
Medicare enrollment lists Alexander M. Johnston as a member of this group (CMS data updated 2026-10-02).
- Guthrie Medical Group PC795 clinicians in the group
Specialties
- General Surgeryprimary
- Critical Care (Intensivists)also
Other general surgeons in Corning
Clinicians with the same Medicare primary specialty in Corning, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2013 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1356785604 |
| 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