Quick answers
- Which hospitals does Ann M. Gessner work at?
- Medicare's official clinician data lists Ann M. Gessner at 2 hospitals: Mary Greeley Medical Center and UnityPoint Health - Marshalltown. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ann M. Gessner see patients?
- Medicare's clinician data lists 1 practice location in Ames, IA. Call before your visit to confirm the address.
- What is Ann M. Gessner's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Ann M. Gessner accept Medicare assignment?
- Yes. Medicare's clinician data says Ann M. Gessner 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 Ann M. Gessner's NPI number?
- 1598768269. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ann M. Gessner works
Medicare's Facility Affiliation Data lists Ann M. Gessner at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mary Greeley Medical CenterAmes, IA · Acute Care Hospital · CCN 160030
- UnityPoint Health - MarshalltownMarshalltown, IA · Acute Care Hospital · CCN 160001
Practice locations
Addresses where Ann M. Gessner is enrolled with Medicare (CMS data updated 2026-10-02).
- 1015 Duff Ave, Suite 100Ames, IA 50010
Group practices
Medicare enrollment lists Ann M. Gessner as a member of this group (CMS data updated 2026-10-02).
- Doran and Doran PC6 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Ames
Clinicians with the same Medicare primary specialty in Ames, IA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 1996 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1598768269 |
| 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