Quick answers
- Where does Jack P. Rheiner see patients?
- Medicare's clinician data lists 2 practice locations, including Mercedes, TX and Harlingen, TX. Call before your visit to confirm the address.
- What is Jack P. Rheiner's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Jack P. Rheiner accept Medicare assignment?
- Yes. Medicare's clinician data says Jack P. Rheiner 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 Jack P. Rheiner?
- (956) 825-3749, as listed in official Medicare / NPI Registry data.
- What is Jack P. Rheiner's NPI number?
- 1376635987. 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 Jack P. Rheiner is enrolled with Medicare (CMS data updated 2026-10-02).
- 2810 W Expressway, 83 Mid Valley Urgent CareMercedes, TX 78570 (956) 825‑3749
- 5501 S Expressway, Suite 77Harlingen, TX 78550 (956) 365‑1000
Group practices
Medicare enrollment lists Jack P. Rheiner as a member of this group (CMS data updated 2026-10-02).
- Knapp Medical Group14 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Mercedes
Clinicians with the same Medicare primary specialty in Mercedes, TX — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2006 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1376635987 |
| 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