Quick answers
- Does Matthew Z. Santiago accept Medicare assignment?
- Yes. Medicare's clinician data says Matthew Z. Santiago 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 Matthew Z. Santiago's NPI number?
- 1427787555. 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 Matthew Z. Santiago is enrolled with Medicare (CMS data updated October 2, 2026).
- 2225 W Southern Ave, Suite AMesa, AZ 85202 (623) 888‑3502
- 3048 E Baseline Rd, Suite 120Mesa, AZ 85204 (702) 480‑2550
Group practices
Medicare enrollment lists Matthew Z. Santiago as a member of these groups (CMS data updated October 2, 2026).
- BHSM Rehabilitation LLC456 clinicians in the group
- Greater Phoenix Collaborative Care PC107 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Mesa
Clinicians with the same Medicare primary specialty in Mesa, AZ — not a recommendation.
Other clinicians in BHSM Rehabilitation LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2022 (4 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1427787555 |
| 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 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