Quick answers
- Which hospitals does Gregory Keller work at?
- Medicare's official clinician data lists Gregory Keller at 2 hospitals: Cass County Memorial Hospital and Clarinda Regional Health Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory Keller see patients?
- Medicare's clinician data lists 5 practice locations, including Atlantic, IA, Clarinda, IA and Blair, NE. Call before your visit to confirm the address.
- What is Gregory Keller's specialty?
- Medicare lists Psychiatry as the primary specialty.
- Does Gregory Keller accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory Keller 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 Gregory Keller?
- (712) 243-3250, as listed in official Medicare / NPI Registry data.
- What is Gregory Keller's NPI number?
- 1649385287. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregory Keller works
Medicare's Facility Affiliation Data lists Gregory Keller at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cass County Memorial HospitalAtlantic, IA · Critical Access Hospital · CCN 161376
- Clarinda Regional Health CenterClarinda, IA · Critical Access Hospital · CCN 161352
Practice locations
Addresses where Gregory Keller is enrolled with Medicare (CMS data updated 2026-10-02).
- 1501 E 10th StAtlantic, IA 50022 (712) 243‑3250
- 220 Essie Davison DrClarinda, IA 51632 (712) 542‑2176
- 220 Essie Davison Dr, PO Box 217Clarinda, IA 51632
- 810 N 22nd StBlair, NE 68008 (402) 426‑2182
- 812 N 22nd StBlair, NE 68008 (402) 426‑4611
Group practices
Medicare enrollment lists Gregory Keller as a member of these groups (CMS data updated 2026-10-02).
- Cass County Memorial Hospital68 clinicians in the group
- Clarinda Regional Health Center51 clinicians in the group
- Memorial Community Hospital Corporation26 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Iowa
Clinicians with the same Medicare primary specialty in Iowa — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | University Of Kansas School Of Med (kc/wich/sal) |
| Graduation year | 2004 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1649385287 |
| 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