Quick answers
- Does Mario A. Aguilar accept Medicare assignment?
- Yes. Medicare's clinician data says Mario A. Aguilar 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 Mario A. Aguilar's NPI number?
- 1457959702. 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 Mario A. Aguilar is enrolled with Medicare (CMS data updated October 2, 2026).
- 1310 Hrc Plaza DrLake St Louis, MO 63367 (636) 339‑4475
- 400 N 5th St, 201 Ellie Mental HealthSaint Charles, MO 63301 (636) 238‑2615
Group practices
Medicare enrollment lists Mario A. Aguilar as a member of this group (CMS data updated October 2, 2026).
- A W Stevenson LLC20 clinicians in the group
Specialties
- Mental Health Counselorprimary
Other mental health counselors in Lake St Louis
Clinicians with the same Medicare primary specialty in Lake St Louis, MO — not a recommendation.
Other clinicians in A W Stevenson LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2018 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1457959702 |
| 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