Quick answers
- Which hospitals does Christopher J. Johnson work at?
- Medicare's official clinician data lists Christopher J. Johnson at 5 hospitals: Boone County Hospital, Mary Greeley Medical Center, Mercy Hospital Northwest Arkansas, UnityPoint Health - Marshalltown and Van Diest Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Christopher J. Johnson see patients?
- Medicare's clinician data lists 3 practice locations, including Ames, IA. Call before your visit to confirm the address.
- What is Christopher J. Johnson's specialty?
- Medicare lists Pathology as the primary specialty.
- Does Christopher J. Johnson accept Medicare assignment?
- Yes. Medicare's clinician data says Christopher J. 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 Christopher J. Johnson?
- (515) 239-4400, as listed in official Medicare / NPI Registry data.
- What is Christopher J. Johnson's NPI number?
- 1316987878. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Christopher J. Johnson works
Medicare's Facility Affiliation Data lists Christopher J. Johnson 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
- Mary Greeley Medical CenterAmes, IA · Acute Care Hospital · CCN 160030
- Mercy Hospital Northwest ArkansasRogers, AR · Acute Care Hospital · CCN 040010
- UnityPoint Health - MarshalltownMarshalltown, IA · Acute Care Hospital · CCN 160001
- Van Diest Medical CenterWebster City, IA · Critical Access Hospital · CCN 161361
Practice locations
Addresses where Christopher J. Johnson is enrolled with Medicare (CMS data updated 2026-10-02).
- 1111 Duff AveAmes, IA 50010
- 1215 Duff AveAmes, IA 50010 (515) 239‑4400
- 3500 University Blvd, Suite 1001Ames, IA 50010 (515) 239‑3040
Group practices
Medicare enrollment lists Christopher J. Johnson as a member of this group (CMS data updated 2026-10-02).
- McFarland Clinic PC363 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Iowa
Clinicians with the same Medicare primary specialty in Iowa — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Iowa, Rj & L Carver College Of Medicine |
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1316987878 |
| 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