Quick answers
- Which hospitals does William A. Greisner Iii work at?
- Medicare's official clinician data lists William A. Greisner Iii at 1 hospital: Saint Joseph East. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William A. Greisner Iii see patients?
- Medicare's clinician data lists 1 practice location in Lexington, KY. Call before your visit to confirm the address.
- What is William A. Greisner Iii's specialty?
- Medicare lists Allergy/Immunology as the primary specialty.
- Does William A. Greisner Iii accept Medicare assignment?
- Yes. Medicare's clinician data says William A. Greisner Iii 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 William A. Greisner Iii?
- (859) 277-9112, as listed in official Medicare / NPI Registry data.
- What is William A. Greisner Iii's NPI number?
- 1720095334. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William A. Greisner Iii works
Medicare's Facility Affiliation Data lists William A. Greisner Iii at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Saint Joseph EastLexington, KY · Acute Care Hospital · CCN 180143
Practice locations
Addresses where William A. Greisner Iii is enrolled with Medicare (CMS data updated 2026-10-02).
- 171 N Eagle Creek Dr, Suite 106Lexington, KY 40509 (859) 277‑9112
Group practices
Medicare enrollment lists William A. Greisner Iii as a member of this group (CMS data updated 2026-10-02).
- Allergy and Asthma Associates, P. S. C2 clinicians in the group
Specialties
- Allergy/Immunologyprimary
Other allergist and immunologists in Lexington
Clinicians with the same Medicare primary specialty in Lexington, KY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Eastern Virginia Medical School |
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1720095334 |
| 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