Quick answers
- Where does Ralph E. Grinnell see patients?
- Medicare's clinician data lists 1 practice location in San Antonio, TX. Call before your visit to confirm the address.
- What is Ralph E. Grinnell's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Ralph E. Grinnell accept Medicare assignment?
- Yes. Medicare's clinician data says Ralph E. Grinnell 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 Ralph E. Grinnell?
- (210) 698-6617, as listed in official Medicare / NPI Registry data.
- What is Ralph E. Grinnell's NPI number?
- 1457666109. 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 Ralph E. Grinnell is enrolled with Medicare (CMS data updated 2026-10-02).
- 23611w Interstate 10San Antonio, TX 78257 (210) 698‑6617
Group practices
Medicare enrollment lists Ralph E. Grinnell as a member of this group (CMS data updated 2026-10-02).
- TMC Provider Group PLLC211 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in San Antonio
Clinicians with the same Medicare primary specialty in San Antonio, TX — not a recommendation.
Clinician information
| Medical school | University Of Texas Medical School At San Antonio |
|---|---|
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1457666109 |
| 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