Quick answers
- Which hospitals does John R. Martinez work at?
- Medicare's official clinician data lists John R. Martinez at 4 hospitals: Cox Medical Center Branson, Cox Medical Centers, North Arkansas Regional Medical Center and University of Kansas Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John R. Martinez see patients?
- Medicare's clinician data lists 2 practice locations, including Branson, MO and Harrison, AR. Call before your visit to confirm the address.
- What is John R. Martinez's specialty?
- Medicare lists Nephrology as the primary specialty.
- Does John R. Martinez accept Medicare assignment?
- Yes. Medicare's clinician data says John R. Martinez 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 John R. Martinez?
- (417) 334-8288, as listed in official Medicare / NPI Registry data.
- What is John R. Martinez's NPI number?
- 1154352417. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John R. Martinez works
Medicare's Facility Affiliation Data lists John R. Martinez at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cox Medical Center BransonBranson, MO · Acute Care Hospital · CCN 260094
- Cox Medical CentersSpringfield, MO · Acute Care Hospital · CCN 260040
- North Arkansas Regional Medical CenterHarrison, AR · Acute Care Hospital · CCN 040017
- University of Kansas HospitalKansas City, KS · Acute Care Hospital · CCN 170040
Practice locations
Addresses where John R. Martinez is enrolled with Medicare (CMS data updated 2026-10-02).
- 101 Skaggs Rd, Suite 302Branson, MO 65616 (417) 334‑8288
- 1409 Gladden StHarrison, AR 72601 (870) 204‑6686
Group practices
Medicare enrollment lists John R. Martinez as a member of this group (CMS data updated 2026-10-02).
- Branson Nephrology LLC6 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in Missouri
Clinicians with the same Medicare primary specialty in Missouri — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Kansas School Of Med (kc/wich/sal) |
| Graduation year | 1985 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1154352417 |
| 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