Quick answers
- Which hospitals does Gregory K. Harter work at?
- Medicare's official clinician data lists Gregory K. Harter at 3 hospitals: Allen Hospital, MercyOne Waterloo Medical Center and Sartori Memorial Hospital, Inc. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory K. Harter see patients?
- Medicare's clinician data lists 5 practice locations, including Waterloo, IA and Dubuque, IA. Call before your visit to confirm the address.
- What is Gregory K. Harter's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Gregory K. Harter accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory K. Harter 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.
- Does Gregory K. Harter offer telehealth?
- Medicare's clinician data says Gregory K. Harter offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Gregory K. Harter?
- (319) 234-5990, as listed in official Medicare / NPI Registry data.
- What is Gregory K. Harter's NPI number?
- 1134157415. 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 K. Harter works
Medicare's Facility Affiliation Data lists Gregory K. Harter at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Allen HospitalWaterloo, IA · Acute Care Hospital · CCN 160110
- MercyOne Waterloo Medical CenterWaterloo, IA · Acute Care Hospital · CCN 160067
- Sartori Memorial Hospital, IncCedar Falls, IA · Acute Care Hospital · CCN 160040
Practice locations
Addresses where Gregory K. Harter is enrolled with Medicare (CMS data updated 2026-10-02).
- 125 E Tower Park DrWaterloo, IA 50701 (319) 234‑5990
- 1753 W Ridgeway Ave, Suite 105Waterloo, IA 50701 (319) 833‑5940
- 1825 Logan AveWaterloo, IA 50703 (319) 235‑3941
- 4135 Pennsylvania AveDubuque, IA 52002
- 4150 Kimball AveWaterloo, IA 50701
Group practices
Medicare enrollment lists Gregory K. Harter as a member of these groups (CMS data updated 2026-10-02).
- Unified Therapy Services, Inc120 clinicians in the group
- Cedar Valley Medical Specialists PC43 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Waterloo
Clinicians with the same Medicare primary specialty in Waterloo, IA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Iowa, Rj & L Carver College Of Medicine |
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1134157415 |
| 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