Quick answers
- Which hospitals does William A. Barry work at?
- Medicare's official clinician data lists William A. Barry at 5 hospitals: Boone County Hospital, Greene County Medical Center, Mary Greeley Medical Center, Story County Hospital and UnityPoint Health - Marshalltown. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William A. Barry see patients?
- Medicare's clinician data lists 2 practice locations, including Ames, IA. Call before your visit to confirm the address.
- What is William A. Barry's specialty?
- Medicare lists Hospitalist as the primary specialty, and also Internal Medicine.
- Does William A. Barry accept Medicare assignment?
- Yes. Medicare's clinician data says William A. Barry 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. Barry?
- (515) 239-4400, as listed in official Medicare / NPI Registry data.
- What is William A. Barry's NPI number?
- 1558358440. 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. Barry works
Medicare's Facility Affiliation Data lists William A. Barry at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Boone County HospitalBoone, IA · Critical Access Hospital · CCN 161372
- Greene County Medical CenterJefferson, IA · Critical Access Hospital · CCN 161325
- Mary Greeley Medical CenterAmes, IA · Acute Care Hospital · CCN 160030
- Story County HospitalNevada, IA · Critical Access Hospital · CCN 161333
- UnityPoint Health - MarshalltownMarshalltown, IA · Acute Care Hospital · CCN 160001
Practice locations
Addresses where William A. Barry is enrolled with Medicare (CMS data updated 2026-10-02).
- 1111 Duff AveAmes, IA 50010
- 1215 Duff AveAmes, IA 50010 (515) 239‑4400
Group practices
Medicare enrollment lists William A. Barry as a member of this group (CMS data updated 2026-10-02).
- McFarland Clinic PC363 clinicians in the group
Specialties
- Hospitalistprimary
- Internal Medicinealso
Other hospitalists in Ames
Clinicians with the same Medicare primary specialty in Ames, IA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Iowa, Rj & L Carver College Of Medicine |
| Graduation year | 1996 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1558358440 |
| 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