Quick answers
- Does Martin A. Chacon Portillo accept Medicare assignment?
- Yes. Medicare's clinician data says Martin A. Chacon Portillo accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Martin A. Chacon Portillo's NPI number?
- 1649769993. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Martin A. Chacon Portillo works
Medicare's Facility Affiliation Data lists Martin A. Chacon Portillo at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Memorial Hermann - Texas Medical CenterHouston, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · CCN 450068
Practice locations
Addresses where Martin A. Chacon Portillo is enrolled with Medicare (CMS data updated October 2, 2026).
- 1333 Moursund St, Memorial Hermann TirrHouston, TX 77030 (713) 797‑5929
- 6411 Fannin StHouston, TX 77030 (713) 704‑4000
Group practices
Medicare enrollment lists Martin A. Chacon Portillo as a member of this group (CMS data updated October 2, 2026).
- UT Physicians1,765 clinicians in the group
Specialties
- Hospitalistprimary
Other hospitalists in Houston
Clinicians with the same Medicare primary specialty in Houston, TX — not a recommendation.
Other clinicians in UT Physicians
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2016 (10 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1649769993 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- 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