Quick answers
- Where does Mariah A. Johnson see patients?
- Medicare's clinician data lists 1 practice location in Sigourney, IA. Call before your visit to confirm the address.
- What is Mariah A. Johnson's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Mariah A. Johnson accept Medicare assignment?
- Yes. Medicare's clinician data says Mariah A. Johnson 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 Mariah A. Johnson?
- (641) 622-2720, as listed in official Medicare / NPI Registry data.
- What is Mariah A. Johnson's NPI number?
- 1548977309. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Mariah A. Johnson is enrolled with Medicare (CMS data updated 2026-10-02).
- 23019 Hwy 149Sigourney, IA 52591 (641) 622‑2720
Group practices
Medicare enrollment lists Mariah A. Johnson as a member of this group (CMS data updated 2026-10-02).
- Keokuk County Health Center23 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Sigourney
Clinicians with the same Medicare primary specialty in Sigourney, IA — not a recommendation.
Clinician information
| Medical school | University Of Iowa, Rj & L Carver College Of Medicine |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548977309 |
| 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
- 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