Quick answers
- Where does Alonso Marron see patients?
- Medicare's clinician data lists 2 practice locations, including Corpus Christi, TX and Brownsville, TX. Call before your visit to confirm the address.
- What is Alonso Marron's specialty?
- Medicare lists Critical Care (Intensivists) as the primary specialty, and also Pediatric Medicine.
- Does Alonso Marron accept Medicare assignment?
- Yes. Medicare's clinician data says Alonso Marron 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 Alonso Marron?
- (956) 698-8600, as listed in official Medicare / NPI Registry data.
- What is Alonso Marron's NPI number?
- 1073010633. 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 Alonso Marron is enrolled with Medicare (CMS data updated 2026-10-02).
- 3533 S Alameda StCorpus Christi, TX 78411
- 5500 N Expressway, 77 Suite 201Brownsville, TX 78411 (956) 698‑8600
Group practices
Medicare enrollment lists Alonso Marron as a member of this group (CMS data updated 2026-10-02).
- Children's Physician Services of South Texas63 clinicians in the group
Specialties
Other critical care doctors in Corpus Christi
Clinicians with the same Medicare primary specialty in Corpus Christi, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1073010633 |
| 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